/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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-sorted-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:10:14,120 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:10:14,125 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:10:14,191 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:10:14,192 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:10:14,200 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:10:14,203 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:10:14,208 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:10:14,212 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:10:14,219 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:10:14,221 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:10:14,224 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:10:14,225 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:10:14,229 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:10:14,232 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:10:14,235 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:10:14,236 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:10:14,241 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:10:14,250 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:10:14,259 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:10:14,261 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:10:14,263 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:10:14,265 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:10:14,268 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:10:14,278 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:10:14,278 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:10:14,279 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:10:14,280 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:10:14,281 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:10:14,282 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:10:14,282 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:10:14,283 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:10:14,284 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:10:14,285 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:10:14,286 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:10:14,287 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:10:14,287 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:10:14,288 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:10:14,288 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:10:14,289 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:10:14,290 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:10:14,291 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 [2020-10-29 09:10:14,318 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:10:14,318 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:10:14,320 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:10:14,320 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:10:14,321 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:10:14,321 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:10:14,321 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:10:14,321 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:10:14,322 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:10:14,322 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:10:14,322 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:10:14,322 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:10:14,322 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:10:14,322 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:10:14,323 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:10:14,323 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:10:14,323 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:10:14,323 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:10:14,324 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:10:14,324 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:10:14,324 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:10:14,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:10:14,324 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:10:14,325 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:10:14,325 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:10:14,325 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:10:14,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:10:14,325 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:10:14,325 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:10:14,326 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:10:14,742 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:10:14,790 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:10:14,793 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:10:14,794 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:10:14,795 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:10:14,796 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-sorted-2.i [2020-10-29 09:10:14,872 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/413007385/672314169b354e75812b80834069125d/FLAG36e6ba0dc [2020-10-29 09:10:15,552 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:10:15,553 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-sorted-2.i [2020-10-29 09:10:15,576 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/413007385/672314169b354e75812b80834069125d/FLAG36e6ba0dc [2020-10-29 09:10:15,861 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/413007385/672314169b354e75812b80834069125d [2020-10-29 09:10:15,866 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:10:15,875 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:10:15,879 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:10:15,880 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:10:15,884 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:10:15,886 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:10:15" (1/1) ... [2020-10-29 09:10:15,894 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15e118aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:15, skipping insertion in model container [2020-10-29 09:10:15,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:10:15" (1/1) ... [2020-10-29 09:10:15,904 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:10:15,980 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:10:16,308 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:10:16,319 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:10:16,416 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:10:16,511 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:10:16,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:16 WrapperNode [2020-10-29 09:10:16,513 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:10:16,514 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:10:16,515 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:10:16,515 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:10:16,528 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:16" (1/1) ... [2020-10-29 09:10:16,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:16" (1/1) ... [2020-10-29 09:10:16,573 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:16" (1/1) ... [2020-10-29 09:10:16,573 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:16" (1/1) ... [2020-10-29 09:10:16,618 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:16" (1/1) ... [2020-10-29 09:10:16,631 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:16" (1/1) ... [2020-10-29 09:10:16,642 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:16" (1/1) ... [2020-10-29 09:10:16,651 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:10:16,652 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:10:16,652 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:10:16,652 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:10:16,653 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:16" (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 [2020-10-29 09:10:16,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:10:16,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:10:16,736 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:10:16,737 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:10:16,737 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-29 09:10:16,738 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-29 09:10:16,738 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-29 09:10:16,738 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-29 09:10:16,738 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-29 09:10:16,739 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-29 09:10:16,740 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-29 09:10:16,741 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-29 09:10:16,741 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-29 09:10:16,741 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-29 09:10:16,742 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-29 09:10:16,742 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-29 09:10:16,743 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-29 09:10:16,743 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-29 09:10:16,743 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-29 09:10:16,743 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-29 09:10:16,744 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-29 09:10:16,744 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-29 09:10:16,744 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-29 09:10:16,744 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-29 09:10:16,750 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-29 09:10:16,750 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-29 09:10:16,751 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-29 09:10:16,751 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-29 09:10:16,752 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-29 09:10:16,752 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-29 09:10:16,752 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-29 09:10:16,753 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-29 09:10:16,753 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-29 09:10:16,753 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-29 09:10:16,753 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-29 09:10:16,753 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-29 09:10:16,753 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-29 09:10:16,754 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-29 09:10:16,754 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-29 09:10:16,754 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-29 09:10:16,754 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-29 09:10:16,754 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-29 09:10:16,754 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-29 09:10:16,754 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-29 09:10:16,755 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-29 09:10:16,755 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-29 09:10:16,755 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-29 09:10:16,755 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-29 09:10:16,755 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-29 09:10:16,755 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-29 09:10:16,755 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-29 09:10:16,756 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-29 09:10:16,756 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-29 09:10:16,757 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-29 09:10:16,757 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-29 09:10:16,758 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-29 09:10:16,758 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-29 09:10:16,758 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-29 09:10:16,758 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-29 09:10:16,759 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-29 09:10:16,759 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-29 09:10:16,759 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-29 09:10:16,760 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-29 09:10:16,760 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:10:16,760 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-29 09:10:16,760 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-29 09:10:16,760 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-29 09:10:16,760 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 09:10:16,760 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-29 09:10:16,760 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-29 09:10:16,761 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-29 09:10:16,761 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-29 09:10:16,763 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-29 09:10:16,763 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-29 09:10:16,764 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-29 09:10:16,764 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-29 09:10:16,764 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-29 09:10:16,764 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-29 09:10:16,764 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-29 09:10:16,764 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-29 09:10:16,765 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-29 09:10:16,797 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-29 09:10:16,797 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-29 09:10:16,798 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-29 09:10:16,798 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-29 09:10:16,798 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-29 09:10:16,798 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-29 09:10:16,798 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-29 09:10:16,798 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-29 09:10:16,798 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-29 09:10:16,799 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-29 09:10:16,799 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-29 09:10:16,799 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-29 09:10:16,799 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-29 09:10:16,799 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-29 09:10:16,799 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-29 09:10:16,799 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-29 09:10:16,799 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-29 09:10:16,800 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-29 09:10:16,800 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-29 09:10:16,800 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-29 09:10:16,800 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-29 09:10:16,800 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-29 09:10:16,800 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-29 09:10:16,800 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-29 09:10:16,800 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-29 09:10:16,801 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-29 09:10:16,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 09:10:16,801 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:10:16,801 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 09:10:16,801 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 09:10:16,801 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:10:16,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:10:16,801 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:10:16,802 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-29 09:10:16,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-29 09:10:16,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:10:16,807 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-29 09:10:16,808 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:10:16,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:10:16,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:10:16,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:10:16,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:10:17,534 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:10:17,535 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-10-29 09:10:17,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:10:17 BoogieIcfgContainer [2020-10-29 09:10:17,541 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:10:17,546 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:10:17,547 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:10:17,550 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:10:17,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:10:15" (1/3) ... [2020-10-29 09:10:17,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e15ac8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:10:17, skipping insertion in model container [2020-10-29 09:10:17,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:10:16" (2/3) ... [2020-10-29 09:10:17,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e15ac8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:10:17, skipping insertion in model container [2020-10-29 09:10:17,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:10:17" (3/3) ... [2020-10-29 09:10:17,554 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-sorted-2.i [2020-10-29 09:10:17,567 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:10:17,574 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:10:17,589 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:10:17,617 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:10:17,617 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:10:17,617 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:10:17,617 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:10:17,618 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:10:17,618 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:10:17,618 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:10:17,618 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:10:17,638 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2020-10-29 09:10:17,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-29 09:10:17,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:17,645 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:17,645 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:17,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:17,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1889217750, now seen corresponding path program 1 times [2020-10-29 09:10:17,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:17,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668880553] [2020-10-29 09:10:17,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:17,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:17,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:17,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:18,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:18,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-29 09:10:18,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:18,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 403 [2020-10-29 09:10:18,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:18,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:18,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:10:18,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:18,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-29 09:10:18,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:10:18,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:18,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:18,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:18,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:18,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:18,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:18,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-29 09:10:18,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:18,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:18,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:18,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:18,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:18,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:18,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:18,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668880553] [2020-10-29 09:10:18,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:18,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 09:10:18,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192348712] [2020-10-29 09:10:18,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:10:18,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:18,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:10:18,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:10:18,483 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 5 states. [2020-10-29 09:10:18,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:18,892 INFO L93 Difference]: Finished difference Result 147 states and 257 transitions. [2020-10-29 09:10:18,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:10:18,894 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-10-29 09:10:18,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:18,905 INFO L225 Difference]: With dead ends: 147 [2020-10-29 09:10:18,905 INFO L226 Difference]: Without dead ends: 79 [2020-10-29 09:10:18,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:10:18,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-29 09:10:18,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 50. [2020-10-29 09:10:18,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-29 09:10:18,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2020-10-29 09:10:18,963 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 12 [2020-10-29 09:10:18,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:18,964 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2020-10-29 09:10:18,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:10:18,964 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2020-10-29 09:10:18,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:10:18,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:18,965 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:18,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:10:18,966 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:18,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:18,967 INFO L82 PathProgramCache]: Analyzing trace with hash -825144030, now seen corresponding path program 1 times [2020-10-29 09:10:18,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:18,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484690121] [2020-10-29 09:10:18,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:18,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:19,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:19,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:19,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:19,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:19,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:10:19,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:10:19,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 723 [2020-10-29 09:10:19,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:19,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:19,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:10:19,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:19,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:10:19,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:19,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:19,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:19,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:19,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:19,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:19,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:19,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:10:19,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:19,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:19,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:19,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:19,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:19,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:19,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:19,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484690121] [2020-10-29 09:10:19,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:19,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:10:19,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590135734] [2020-10-29 09:10:19,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:10:19,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:19,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:10:19,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:10:19,880 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand 6 states. [2020-10-29 09:10:20,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:20,204 INFO L93 Difference]: Finished difference Result 109 states and 144 transitions. [2020-10-29 09:10:20,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:10:20,204 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-29 09:10:20,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:20,206 INFO L225 Difference]: With dead ends: 109 [2020-10-29 09:10:20,206 INFO L226 Difference]: Without dead ends: 76 [2020-10-29 09:10:20,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:10:20,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-29 09:10:20,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2020-10-29 09:10:20,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-29 09:10:20,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2020-10-29 09:10:20,222 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 23 [2020-10-29 09:10:20,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:20,223 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2020-10-29 09:10:20,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:10:20,223 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2020-10-29 09:10:20,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:10:20,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:20,225 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] [2020-10-29 09:10:20,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:10:20,225 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:20,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:20,226 INFO L82 PathProgramCache]: Analyzing trace with hash 945720343, now seen corresponding path program 1 times [2020-10-29 09:10:20,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:20,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482459337] [2020-10-29 09:10:20,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:20,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:20,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:20,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:20,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:10:20,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:20,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 223 [2020-10-29 09:10:20,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:20,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:20,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:10:20,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:20,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:10:20,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:20,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:20,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:20,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:20,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:20,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:20,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:20,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:10:20,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:20,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:20,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:20,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:20,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:20,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 09:10:20,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482459337] [2020-10-29 09:10:20,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:20,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:10:20,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873966053] [2020-10-29 09:10:20,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:10:20,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:20,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:10:20,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:10:20,575 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand 6 states. [2020-10-29 09:10:20,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:20,907 INFO L93 Difference]: Finished difference Result 105 states and 135 transitions. [2020-10-29 09:10:20,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:10:20,908 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-29 09:10:20,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:20,909 INFO L225 Difference]: With dead ends: 105 [2020-10-29 09:10:20,928 INFO L226 Difference]: Without dead ends: 65 [2020-10-29 09:10:20,930 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 [2020-10-29 09:10:20,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-29 09:10:20,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2020-10-29 09:10:20,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-29 09:10:20,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2020-10-29 09:10:20,940 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 26 [2020-10-29 09:10:20,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:20,941 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2020-10-29 09:10:20,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:10:20,941 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2020-10-29 09:10:20,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:10:20,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:20,942 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] [2020-10-29 09:10:20,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:10:20,943 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:20,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:20,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1389327989, now seen corresponding path program 1 times [2020-10-29 09:10:20,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:20,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478295528] [2020-10-29 09:10:20,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:20,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:20,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:20,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:21,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:21,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:21,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:10:21,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:10:21,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 689 [2020-10-29 09:10:21,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:21,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:21,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:10:21,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:21,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:10:21,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:21,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:21,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:21,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:21,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:21,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:21,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:21,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 09:10:21,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:21,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:21,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:21,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:21,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:21,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:21,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:21,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478295528] [2020-10-29 09:10:21,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:21,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:10:21,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185841996] [2020-10-29 09:10:21,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:10:21,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:21,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:10:21,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:10:21,866 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand 8 states. [2020-10-29 09:10:22,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:22,474 INFO L93 Difference]: Finished difference Result 154 states and 198 transitions. [2020-10-29 09:10:22,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:10:22,475 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-29 09:10:22,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:22,481 INFO L225 Difference]: With dead ends: 154 [2020-10-29 09:10:22,481 INFO L226 Difference]: Without dead ends: 120 [2020-10-29 09:10:22,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:10:22,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-29 09:10:22,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 74. [2020-10-29 09:10:22,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-29 09:10:22,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 93 transitions. [2020-10-29 09:10:22,507 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 93 transitions. Word has length 27 [2020-10-29 09:10:22,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:22,507 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 93 transitions. [2020-10-29 09:10:22,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:10:22,507 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 93 transitions. [2020-10-29 09:10:22,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:10:22,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:22,512 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] [2020-10-29 09:10:22,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:10:22,513 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:22,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:22,514 INFO L82 PathProgramCache]: Analyzing trace with hash 996300979, now seen corresponding path program 1 times [2020-10-29 09:10:22,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:22,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666517719] [2020-10-29 09:10:22,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:22,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:22,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:22,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:22,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:22,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:23,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:23,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:23,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:10:23,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:10:23,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1322 [2020-10-29 09:10:23,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:23,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:23,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:10:23,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:23,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:10:23,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:23,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:23,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:23,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:23,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:23,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:23,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:23,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:10:23,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:23,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:23,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:23,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:23,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:23,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:23,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:23,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666517719] [2020-10-29 09:10:23,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:23,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:10:23,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880669770] [2020-10-29 09:10:23,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:10:23,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:24,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:10:24,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:10:24,010 INFO L87 Difference]: Start difference. First operand 74 states and 93 transitions. Second operand 8 states. [2020-10-29 09:10:24,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:24,541 INFO L93 Difference]: Finished difference Result 160 states and 205 transitions. [2020-10-29 09:10:24,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:10:24,542 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-29 09:10:24,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:24,544 INFO L225 Difference]: With dead ends: 160 [2020-10-29 09:10:24,544 INFO L226 Difference]: Without dead ends: 125 [2020-10-29 09:10:24,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:10:24,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-29 09:10:24,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 82. [2020-10-29 09:10:24,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-29 09:10:24,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2020-10-29 09:10:24,576 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 27 [2020-10-29 09:10:24,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:24,576 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2020-10-29 09:10:24,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:10:24,576 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2020-10-29 09:10:24,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:10:24,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:24,578 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] [2020-10-29 09:10:24,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:10:24,579 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:24,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:24,579 INFO L82 PathProgramCache]: Analyzing trace with hash -911494601, now seen corresponding path program 1 times [2020-10-29 09:10:24,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:24,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338947170] [2020-10-29 09:10:24,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:24,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:24,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:24,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:24,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:10:24,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:24,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 270 [2020-10-29 09:10:24,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:24,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:24,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:10:24,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:24,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:10:24,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:25,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:25,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:25,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:25,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:25,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:25,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:25,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:10:25,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:25,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:25,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:25,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:25,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:25,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:25,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:25,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338947170] [2020-10-29 09:10:25,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:25,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:10:25,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373261294] [2020-10-29 09:10:25,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:10:25,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:25,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:10:25,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:10:25,164 INFO L87 Difference]: Start difference. First operand 82 states and 101 transitions. Second operand 9 states. [2020-10-29 09:10:26,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:26,064 INFO L93 Difference]: Finished difference Result 143 states and 182 transitions. [2020-10-29 09:10:26,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:10:26,064 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-29 09:10:26,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:26,067 INFO L225 Difference]: With dead ends: 143 [2020-10-29 09:10:26,067 INFO L226 Difference]: Without dead ends: 139 [2020-10-29 09:10:26,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:10:26,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-29 09:10:26,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 88. [2020-10-29 09:10:26,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-29 09:10:26,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 110 transitions. [2020-10-29 09:10:26,081 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 110 transitions. Word has length 27 [2020-10-29 09:10:26,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:26,082 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 110 transitions. [2020-10-29 09:10:26,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:10:26,082 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 110 transitions. [2020-10-29 09:10:26,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:10:26,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:26,083 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:26,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:10:26,084 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:26,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:26,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1034314442, now seen corresponding path program 1 times [2020-10-29 09:10:26,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:26,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440111547] [2020-10-29 09:10:26,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:26,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:26,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:26,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:26,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:26,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:10:26,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:26,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 299 [2020-10-29 09:10:26,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:26,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:26,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:10:26,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:26,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:10:26,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:26,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:26,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:26,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:26,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:26,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:26,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:26,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:10:26,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:26,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:26,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:26,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:26,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:26,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:26,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:26,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440111547] [2020-10-29 09:10:26,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:26,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 09:10:26,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758458543] [2020-10-29 09:10:26,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:10:26,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:26,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:10:26,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:10:26,669 INFO L87 Difference]: Start difference. First operand 88 states and 110 transitions. Second operand 9 states. [2020-10-29 09:10:27,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:27,405 INFO L93 Difference]: Finished difference Result 152 states and 193 transitions. [2020-10-29 09:10:27,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:10:27,406 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-10-29 09:10:27,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:27,408 INFO L225 Difference]: With dead ends: 152 [2020-10-29 09:10:27,408 INFO L226 Difference]: Without dead ends: 148 [2020-10-29 09:10:27,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:10:27,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-29 09:10:27,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 97. [2020-10-29 09:10:27,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-29 09:10:27,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 122 transitions. [2020-10-29 09:10:27,430 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 122 transitions. Word has length 29 [2020-10-29 09:10:27,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:27,430 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 122 transitions. [2020-10-29 09:10:27,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:10:27,431 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 122 transitions. [2020-10-29 09:10:27,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:10:27,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:27,436 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:27,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:10:27,438 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:27,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:27,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1427341452, now seen corresponding path program 1 times [2020-10-29 09:10:27,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:27,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727652989] [2020-10-29 09:10:27,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:27,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:27,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:27,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:27,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:27,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:10:27,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:27,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 294 [2020-10-29 09:10:27,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:27,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:27,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:10:27,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:27,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 09:10:27,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:27,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:27,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:27,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:27,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:27,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:27,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:27,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:27,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:27,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:27,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:27,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:27,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:27,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:27,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:27,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727652989] [2020-10-29 09:10:27,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:27,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:10:27,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343868048] [2020-10-29 09:10:27,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:10:27,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:27,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:10:27,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:10:27,867 INFO L87 Difference]: Start difference. First operand 97 states and 122 transitions. Second operand 6 states. [2020-10-29 09:10:28,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:28,172 INFO L93 Difference]: Finished difference Result 121 states and 151 transitions. [2020-10-29 09:10:28,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:10:28,173 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-29 09:10:28,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:28,174 INFO L225 Difference]: With dead ends: 121 [2020-10-29 09:10:28,174 INFO L226 Difference]: Without dead ends: 97 [2020-10-29 09:10:28,176 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 [2020-10-29 09:10:28,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-29 09:10:28,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-10-29 09:10:28,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-29 09:10:28,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 121 transitions. [2020-10-29 09:10:28,197 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 121 transitions. Word has length 29 [2020-10-29 09:10:28,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:28,198 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 121 transitions. [2020-10-29 09:10:28,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:10:28,198 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 121 transitions. [2020-10-29 09:10:28,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:10:28,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:28,204 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:28,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:10:28,205 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:28,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:28,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1820793438, now seen corresponding path program 1 times [2020-10-29 09:10:28,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:28,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1732668614] [2020-10-29 09:10:28,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:28,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:28,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:28,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:28,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:28,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:28,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:10:28,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:10:28,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 627 [2020-10-29 09:10:28,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:28,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:28,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:10:28,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:28,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:10:28,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:29,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:29,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:29,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:29,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:29,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:29,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:29,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:10:29,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:29,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:29,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:29,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:29,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:29,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:29,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:29,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1732668614] [2020-10-29 09:10:29,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:29,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 09:10:29,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513905531] [2020-10-29 09:10:29,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:10:29,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:29,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:10:29,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:10:29,097 INFO L87 Difference]: Start difference. First operand 97 states and 121 transitions. Second operand 9 states. [2020-10-29 09:10:29,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:29,833 INFO L93 Difference]: Finished difference Result 161 states and 203 transitions. [2020-10-29 09:10:29,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:10:29,834 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-10-29 09:10:29,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:29,835 INFO L225 Difference]: With dead ends: 161 [2020-10-29 09:10:29,836 INFO L226 Difference]: Without dead ends: 149 [2020-10-29 09:10:29,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:10:29,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-29 09:10:29,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 98. [2020-10-29 09:10:29,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-29 09:10:29,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 122 transitions. [2020-10-29 09:10:29,853 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 122 transitions. Word has length 30 [2020-10-29 09:10:29,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:29,853 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 122 transitions. [2020-10-29 09:10:29,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:10:29,853 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 122 transitions. [2020-10-29 09:10:29,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:10:29,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:29,858 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:29,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:10:29,859 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:29,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:29,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1011446812, now seen corresponding path program 1 times [2020-10-29 09:10:29,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:29,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678788808] [2020-10-29 09:10:29,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:29,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:29,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:29,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:29,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:30,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:30,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:30,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:30,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:30,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:30,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:10:30,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:10:30,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 735 [2020-10-29 09:10:30,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:30,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:30,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:10:30,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:30,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:10:30,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:30,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:30,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:30,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:30,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:30,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:30,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:30,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:10:30,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:30,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:30,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:30,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:30,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:30,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:30,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:30,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678788808] [2020-10-29 09:10:30,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:30,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:10:30,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133086667] [2020-10-29 09:10:30,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:10:30,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:30,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:10:30,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:10:30,745 INFO L87 Difference]: Start difference. First operand 98 states and 122 transitions. Second operand 6 states. [2020-10-29 09:10:31,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:31,245 INFO L93 Difference]: Finished difference Result 154 states and 194 transitions. [2020-10-29 09:10:31,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:10:31,245 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-10-29 09:10:31,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:31,247 INFO L225 Difference]: With dead ends: 154 [2020-10-29 09:10:31,247 INFO L226 Difference]: Without dead ends: 128 [2020-10-29 09:10:31,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:10:31,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-29 09:10:31,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2020-10-29 09:10:31,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-29 09:10:31,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 121 transitions. [2020-10-29 09:10:31,271 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 121 transitions. Word has length 30 [2020-10-29 09:10:31,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:31,274 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 121 transitions. [2020-10-29 09:10:31,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:10:31,274 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 121 transitions. [2020-10-29 09:10:31,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:10:31,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:31,275 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:31,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:10:31,276 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:31,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:31,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1583971812, now seen corresponding path program 1 times [2020-10-29 09:10:31,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:31,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292084639] [2020-10-29 09:10:31,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:31,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:31,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:31,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:31,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:31,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:32,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:32,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:10:32,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:10:32,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1613 [2020-10-29 09:10:32,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:32,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:32,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:10:32,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:32,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:10:32,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:33,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:33,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:33,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:33,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:33,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:33,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:33,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:10:33,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:33,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:33,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:33,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:33,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:33,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:33,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:33,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292084639] [2020-10-29 09:10:33,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:33,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:10:33,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156610664] [2020-10-29 09:10:33,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:10:33,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:33,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:10:33,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:10:33,070 INFO L87 Difference]: Start difference. First operand 99 states and 121 transitions. Second operand 9 states. [2020-10-29 09:10:33,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:33,776 INFO L93 Difference]: Finished difference Result 164 states and 204 transitions. [2020-10-29 09:10:33,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:10:33,777 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-10-29 09:10:33,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:33,778 INFO L225 Difference]: With dead ends: 164 [2020-10-29 09:10:33,779 INFO L226 Difference]: Without dead ends: 124 [2020-10-29 09:10:33,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:10:33,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-29 09:10:33,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 101. [2020-10-29 09:10:33,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-29 09:10:33,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 123 transitions. [2020-10-29 09:10:33,791 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 123 transitions. Word has length 30 [2020-10-29 09:10:33,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:33,791 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 123 transitions. [2020-10-29 09:10:33,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:10:33,791 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 123 transitions. [2020-10-29 09:10:33,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:10:33,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:33,792 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] [2020-10-29 09:10:33,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:10:33,793 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:33,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:33,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1190944802, now seen corresponding path program 1 times [2020-10-29 09:10:33,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:33,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659887164] [2020-10-29 09:10:33,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:33,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:33,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:33,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:33,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:33,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:33,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:34,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:34,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:10:34,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:10:34,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1110 [2020-10-29 09:10:34,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:34,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:34,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:10:34,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:34,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:10:34,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:35,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:35,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:35,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:35,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:35,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:35,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:35,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 09:10:35,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:35,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:35,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:35,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:35,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:35,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:35,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659887164] [2020-10-29 09:10:35,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:35,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:10:35,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776052991] [2020-10-29 09:10:35,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:10:35,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:35,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:10:35,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:10:35,077 INFO L87 Difference]: Start difference. First operand 101 states and 123 transitions. Second operand 9 states. [2020-10-29 09:10:35,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:35,787 INFO L93 Difference]: Finished difference Result 150 states and 183 transitions. [2020-10-29 09:10:35,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:10:35,787 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-10-29 09:10:35,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:35,789 INFO L225 Difference]: With dead ends: 150 [2020-10-29 09:10:35,789 INFO L226 Difference]: Without dead ends: 114 [2020-10-29 09:10:35,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:10:35,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-29 09:10:35,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 105. [2020-10-29 09:10:35,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-29 09:10:35,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 127 transitions. [2020-10-29 09:10:35,805 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 127 transitions. Word has length 30 [2020-10-29 09:10:35,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:35,806 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 127 transitions. [2020-10-29 09:10:35,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:10:35,806 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 127 transitions. [2020-10-29 09:10:35,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:10:35,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:35,807 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:35,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:10:35,807 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:35,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:35,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1807992789, now seen corresponding path program 1 times [2020-10-29 09:10:35,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:35,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74215706] [2020-10-29 09:10:35,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:35,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:35,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:35,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:35,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:36,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:36,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:10:36,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:10:36,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 637 [2020-10-29 09:10:36,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:36,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:36,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:10:36,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:36,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 09:10:36,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:36,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:36,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:36,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:36,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:36,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:36,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:36,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:36,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:36,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:36,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:36,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:36,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:36,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:36,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:36,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74215706] [2020-10-29 09:10:36,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:10:36,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 09:10:36,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085720857] [2020-10-29 09:10:36,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:10:36,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:36,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:10:36,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:10:36,720 INFO L87 Difference]: Start difference. First operand 105 states and 127 transitions. Second operand 9 states. [2020-10-29 09:10:37,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:37,109 INFO L93 Difference]: Finished difference Result 179 states and 223 transitions. [2020-10-29 09:10:37,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:10:37,110 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-29 09:10:37,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:37,111 INFO L225 Difference]: With dead ends: 179 [2020-10-29 09:10:37,111 INFO L226 Difference]: Without dead ends: 86 [2020-10-29 09:10:37,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:10:37,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-29 09:10:37,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2020-10-29 09:10:37,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-29 09:10:37,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 103 transitions. [2020-10-29 09:10:37,122 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 103 transitions. Word has length 31 [2020-10-29 09:10:37,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:37,122 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 103 transitions. [2020-10-29 09:10:37,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:10:37,123 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 103 transitions. [2020-10-29 09:10:37,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:10:37,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:37,123 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:37,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:10:37,124 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:37,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:37,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1694431754, now seen corresponding path program 1 times [2020-10-29 09:10:37,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:37,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77119089] [2020-10-29 09:10:37,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:37,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:37,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:37,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:37,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:37,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:10:37,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:37,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 564 [2020-10-29 09:10:37,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:37,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:37,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:10:37,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:37,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:10:37,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:37,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:37,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:37,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:37,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:37,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:37,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:37,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:37,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:37,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:37,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:37,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:37,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:37,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:37,899 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:37,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77119089] [2020-10-29 09:10:37,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:37,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:10:37,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662145862] [2020-10-29 09:10:37,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:10:37,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:37,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:10:37,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:10:37,901 INFO L87 Difference]: Start difference. First operand 82 states and 103 transitions. Second operand 10 states. [2020-10-29 09:10:38,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:38,693 INFO L93 Difference]: Finished difference Result 178 states and 226 transitions. [2020-10-29 09:10:38,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:10:38,694 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-29 09:10:38,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:38,695 INFO L225 Difference]: With dead ends: 178 [2020-10-29 09:10:38,695 INFO L226 Difference]: Without dead ends: 142 [2020-10-29 09:10:38,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:10:38,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-29 09:10:38,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 96. [2020-10-29 09:10:38,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-29 09:10:38,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 121 transitions. [2020-10-29 09:10:38,708 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 121 transitions. Word has length 31 [2020-10-29 09:10:38,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:38,709 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 121 transitions. [2020-10-29 09:10:38,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:10:38,709 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 121 transitions. [2020-10-29 09:10:38,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:10:38,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:38,710 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:38,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:10:38,710 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:38,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:38,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1301404744, now seen corresponding path program 1 times [2020-10-29 09:10:38,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:38,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970857435] [2020-10-29 09:10:38,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:38,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:38,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:38,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:38,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:39,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:39,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:39,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:39,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:10:39,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 09:10:39,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1242 [2020-10-29 09:10:39,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:39,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:39,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:10:39,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:39,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:10:39,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:40,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:40,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:40,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:40,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:40,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:40,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:40,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:40,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:40,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:40,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:40,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:40,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:40,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:40,144 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:40,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970857435] [2020-10-29 09:10:40,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:40,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:10:40,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702013732] [2020-10-29 09:10:40,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:10:40,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:40,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:10:40,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:10:40,148 INFO L87 Difference]: Start difference. First operand 96 states and 121 transitions. Second operand 9 states. [2020-10-29 09:10:40,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:40,529 INFO L93 Difference]: Finished difference Result 141 states and 179 transitions. [2020-10-29 09:10:40,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:10:40,530 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-29 09:10:40,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:40,531 INFO L225 Difference]: With dead ends: 141 [2020-10-29 09:10:40,531 INFO L226 Difference]: Without dead ends: 104 [2020-10-29 09:10:40,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:10:40,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-29 09:10:40,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2020-10-29 09:10:40,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-29 09:10:40,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 122 transitions. [2020-10-29 09:10:40,542 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 122 transitions. Word has length 31 [2020-10-29 09:10:40,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:40,542 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 122 transitions. [2020-10-29 09:10:40,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:10:40,543 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 122 transitions. [2020-10-29 09:10:40,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:10:40,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:40,543 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:40,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:10:40,544 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:40,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:40,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1475577036, now seen corresponding path program 2 times [2020-10-29 09:10:40,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:40,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771703661] [2020-10-29 09:10:40,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:40,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:40,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:41,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:41,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:10:41,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:41,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 480 [2020-10-29 09:10:41,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:41,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:41,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:10:41,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:41,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 09:10:41,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:41,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:41,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:41,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:41,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:41,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:41,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:41,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:41,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:41,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:41,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:41,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:41,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:41,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:41,237 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:41,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771703661] [2020-10-29 09:10:41,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:41,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:10:41,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794315307] [2020-10-29 09:10:41,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:10:41,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:41,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:10:41,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:10:41,240 INFO L87 Difference]: Start difference. First operand 98 states and 122 transitions. Second operand 11 states. [2020-10-29 09:10:42,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:42,204 INFO L93 Difference]: Finished difference Result 169 states and 214 transitions. [2020-10-29 09:10:42,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:10:42,204 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-29 09:10:42,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:42,206 INFO L225 Difference]: With dead ends: 169 [2020-10-29 09:10:42,206 INFO L226 Difference]: Without dead ends: 165 [2020-10-29 09:10:42,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:10:42,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-29 09:10:42,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 114. [2020-10-29 09:10:42,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-29 09:10:42,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 144 transitions. [2020-10-29 09:10:42,221 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 144 transitions. Word has length 31 [2020-10-29 09:10:42,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:42,221 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 144 transitions. [2020-10-29 09:10:42,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:10:42,222 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 144 transitions. [2020-10-29 09:10:42,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 09:10:42,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:42,223 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:42,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:10:42,223 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:42,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:42,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1036867019, now seen corresponding path program 1 times [2020-10-29 09:10:42,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:42,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153650057] [2020-10-29 09:10:42,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:42,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:42,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:42,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:42,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:42,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:43,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:43,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:43,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:46,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:46,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:10:46,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:10:46,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3932 [2020-10-29 09:10:46,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:46,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:46,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:10:46,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:46,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:10:46,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:46,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:46,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:46,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:46,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:46,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:46,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:46,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:10:46,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:46,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:46,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:46,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:46,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:46,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:46,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:46,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153650057] [2020-10-29 09:10:46,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:46,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:10:46,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341425274] [2020-10-29 09:10:46,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:10:46,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:46,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:10:46,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:10:46,312 INFO L87 Difference]: Start difference. First operand 114 states and 144 transitions. Second operand 8 states. [2020-10-29 09:10:46,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:46,794 INFO L93 Difference]: Finished difference Result 168 states and 212 transitions. [2020-10-29 09:10:46,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:10:46,795 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-29 09:10:46,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:46,796 INFO L225 Difference]: With dead ends: 168 [2020-10-29 09:10:46,796 INFO L226 Difference]: Without dead ends: 142 [2020-10-29 09:10:46,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:10:46,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-29 09:10:46,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 121. [2020-10-29 09:10:46,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-29 09:10:46,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 154 transitions. [2020-10-29 09:10:46,810 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 154 transitions. Word has length 33 [2020-10-29 09:10:46,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:46,811 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 154 transitions. [2020-10-29 09:10:46,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:10:46,811 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 154 transitions. [2020-10-29 09:10:46,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 09:10:46,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:46,812 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:46,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:10:46,812 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:46,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:46,813 INFO L82 PathProgramCache]: Analyzing trace with hash 643840009, now seen corresponding path program 1 times [2020-10-29 09:10:46,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:46,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670187572] [2020-10-29 09:10:46,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:46,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:46,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:47,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:47,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:10:47,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:47,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 672 [2020-10-29 09:10:47,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:47,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:47,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:10:47,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:47,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 09:10:47,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:47,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:47,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:47,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:47,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:47,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:47,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:47,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:10:47,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:47,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:47,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:47,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:47,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:47,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:47,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:47,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670187572] [2020-10-29 09:10:47,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:47,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:10:47,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943576187] [2020-10-29 09:10:47,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:10:47,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:47,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:10:47,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:10:47,909 INFO L87 Difference]: Start difference. First operand 121 states and 154 transitions. Second operand 11 states. [2020-10-29 09:10:49,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:49,045 INFO L93 Difference]: Finished difference Result 219 states and 279 transitions. [2020-10-29 09:10:49,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:10:49,046 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-29 09:10:49,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:49,048 INFO L225 Difference]: With dead ends: 219 [2020-10-29 09:10:49,048 INFO L226 Difference]: Without dead ends: 215 [2020-10-29 09:10:49,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:10:49,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-29 09:10:49,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 140. [2020-10-29 09:10:49,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-29 09:10:49,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 180 transitions. [2020-10-29 09:10:49,066 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 180 transitions. Word has length 33 [2020-10-29 09:10:49,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:49,067 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 180 transitions. [2020-10-29 09:10:49,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:10:49,067 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 180 transitions. [2020-10-29 09:10:49,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 09:10:49,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:49,068 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:49,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:10:49,068 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:49,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:49,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1515530705, now seen corresponding path program 1 times [2020-10-29 09:10:49,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:49,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393638585] [2020-10-29 09:10:49,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:49,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:49,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:49,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:49,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:49,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 09:10:49,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:49,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 718 [2020-10-29 09:10:49,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:49,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:49,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:10:49,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:49,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:10:49,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:50,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:50,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:50,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:50,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:50,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:50,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:50,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:10:50,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:50,052 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:50,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:50,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:50,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:50,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:50,063 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:50,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393638585] [2020-10-29 09:10:50,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:50,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:10:50,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106832471] [2020-10-29 09:10:50,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:10:50,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:50,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:10:50,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:10:50,066 INFO L87 Difference]: Start difference. First operand 140 states and 180 transitions. Second operand 11 states. [2020-10-29 09:10:51,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:51,331 INFO L93 Difference]: Finished difference Result 188 states and 241 transitions. [2020-10-29 09:10:51,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:10:51,331 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-10-29 09:10:51,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:51,333 INFO L225 Difference]: With dead ends: 188 [2020-10-29 09:10:51,333 INFO L226 Difference]: Without dead ends: 184 [2020-10-29 09:10:51,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:10:51,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-29 09:10:51,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 150. [2020-10-29 09:10:51,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-29 09:10:51,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 194 transitions. [2020-10-29 09:10:51,353 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 194 transitions. Word has length 34 [2020-10-29 09:10:51,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:51,353 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 194 transitions. [2020-10-29 09:10:51,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:10:51,353 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 194 transitions. [2020-10-29 09:10:51,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 09:10:51,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:51,354 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] [2020-10-29 09:10:51,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:10:51,355 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:51,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:51,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1990993429, now seen corresponding path program 1 times [2020-10-29 09:10:51,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:51,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136675363] [2020-10-29 09:10:51,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:51,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:51,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:51,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:52,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:52,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 09:10:52,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:52,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1425 [2020-10-29 09:10:52,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:52,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:52,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:10:52,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:52,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 09:10:52,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:53,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:53,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:53,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:53,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:53,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:53,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:53,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:53,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:53,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:53,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:53,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:53,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:53,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:53,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:53,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136675363] [2020-10-29 09:10:53,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:53,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:10:53,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944291603] [2020-10-29 09:10:53,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:10:53,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:53,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:10:53,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:10:53,311 INFO L87 Difference]: Start difference. First operand 150 states and 194 transitions. Second operand 11 states. [2020-10-29 09:10:54,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:54,205 INFO L93 Difference]: Finished difference Result 193 states and 246 transitions. [2020-10-29 09:10:54,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:10:54,205 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-10-29 09:10:54,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:54,209 INFO L225 Difference]: With dead ends: 193 [2020-10-29 09:10:54,209 INFO L226 Difference]: Without dead ends: 181 [2020-10-29 09:10:54,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:10:54,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-29 09:10:54,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 154. [2020-10-29 09:10:54,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-29 09:10:54,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 198 transitions. [2020-10-29 09:10:54,235 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 198 transitions. Word has length 34 [2020-10-29 09:10:54,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:54,235 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 198 transitions. [2020-10-29 09:10:54,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:10:54,235 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 198 transitions. [2020-10-29 09:10:54,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:10:54,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:54,236 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] [2020-10-29 09:10:54,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:10:54,236 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:54,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:54,237 INFO L82 PathProgramCache]: Analyzing trace with hash 317988957, now seen corresponding path program 2 times [2020-10-29 09:10:54,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:54,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343814456] [2020-10-29 09:10:54,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:54,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:54,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:54,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:54,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:55,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:55,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:10:55,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:10:55,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1223 [2020-10-29 09:10:55,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:55,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:55,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:10:55,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:55,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 09:10:55,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:10:55,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:55,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:55,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:55,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:55,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:55,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:55,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:10:55,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:55,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:55,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:55,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:55,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:55,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:55,869 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:55,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343814456] [2020-10-29 09:10:55,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:55,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:10:55,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234543270] [2020-10-29 09:10:55,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:10:55,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:55,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:10:55,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:10:55,874 INFO L87 Difference]: Start difference. First operand 154 states and 198 transitions. Second operand 11 states. [2020-10-29 09:10:56,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:10:56,749 INFO L93 Difference]: Finished difference Result 261 states and 339 transitions. [2020-10-29 09:10:56,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:10:56,750 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-29 09:10:56,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:10:56,751 INFO L225 Difference]: With dead ends: 261 [2020-10-29 09:10:56,751 INFO L226 Difference]: Without dead ends: 200 [2020-10-29 09:10:56,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:10:56,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-29 09:10:56,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 169. [2020-10-29 09:10:56,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-29 09:10:56,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 217 transitions. [2020-10-29 09:10:56,772 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 217 transitions. Word has length 35 [2020-10-29 09:10:56,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:10:56,772 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 217 transitions. [2020-10-29 09:10:56,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:10:56,773 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 217 transitions. [2020-10-29 09:10:56,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:10:56,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:10:56,773 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:10:56,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:10:56,774 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:10:56,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:10:56,774 INFO L82 PathProgramCache]: Analyzing trace with hash 285698622, now seen corresponding path program 1 times [2020-10-29 09:10:56,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:10:56,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459477265] [2020-10-29 09:10:56,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:10:56,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:56,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:56,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:58,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:58,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:10:58,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:10:58,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1367 [2020-10-29 09:10:58,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:58,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:58,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:10:58,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:10:58,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 09:10:58,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:58,452 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 41 [2020-10-29 09:10:58,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:10:58,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:10:58,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:10:58,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:10:58,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:10:58,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:10:58,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:10:58,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:10:58,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:10:58,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:10:58,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:10:58,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:10:58,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:10:58,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:10:58,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459477265] [2020-10-29 09:10:58,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:10:58,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:10:58,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390827420] [2020-10-29 09:10:58,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:10:58,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:10:58,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:10:58,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:10:58,904 INFO L87 Difference]: Start difference. First operand 169 states and 217 transitions. Second operand 11 states. [2020-10-29 09:10:59,170 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2020-10-29 09:10:59,298 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2020-10-29 09:10:59,466 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-10-29 09:10:59,616 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-29 09:11:00,670 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-29 09:11:01,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:01,303 INFO L93 Difference]: Finished difference Result 221 states and 280 transitions. [2020-10-29 09:11:01,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:11:01,305 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-29 09:11:01,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:01,306 INFO L225 Difference]: With dead ends: 221 [2020-10-29 09:11:01,306 INFO L226 Difference]: Without dead ends: 217 [2020-10-29 09:11:01,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:11:01,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-29 09:11:01,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 180. [2020-10-29 09:11:01,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-29 09:11:01,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 228 transitions. [2020-10-29 09:11:01,326 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 228 transitions. Word has length 35 [2020-10-29 09:11:01,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:01,326 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 228 transitions. [2020-10-29 09:11:01,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:11:01,326 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 228 transitions. [2020-10-29 09:11:01,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:11:01,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:01,327 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] [2020-10-29 09:11:01,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:11:01,328 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:01,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:01,328 INFO L82 PathProgramCache]: Analyzing trace with hash 255949343, now seen corresponding path program 3 times [2020-10-29 09:11:01,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:01,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127316452] [2020-10-29 09:11:01,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:01,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:01,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:01,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:02,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:02,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:11:02,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:02,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1037 [2020-10-29 09:11:02,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:02,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:02,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:11:02,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:02,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 09:11:02,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:02,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:02,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:02,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:02,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:02,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:02,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:02,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:11:02,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:02,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:02,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:02,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:02,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:02,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:02,844 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:02,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127316452] [2020-10-29 09:11:02,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:02,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:11:02,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282884920] [2020-10-29 09:11:02,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:11:02,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:02,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:11:02,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:11:02,849 INFO L87 Difference]: Start difference. First operand 180 states and 228 transitions. Second operand 12 states. [2020-10-29 09:11:04,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:04,035 INFO L93 Difference]: Finished difference Result 242 states and 311 transitions. [2020-10-29 09:11:04,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:11:04,036 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-29 09:11:04,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:04,039 INFO L225 Difference]: With dead ends: 242 [2020-10-29 09:11:04,039 INFO L226 Difference]: Without dead ends: 238 [2020-10-29 09:11:04,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:11:04,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-29 09:11:04,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 199. [2020-10-29 09:11:04,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-29 09:11:04,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 254 transitions. [2020-10-29 09:11:04,067 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 254 transitions. Word has length 35 [2020-10-29 09:11:04,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:04,068 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 254 transitions. [2020-10-29 09:11:04,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:11:04,068 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 254 transitions. [2020-10-29 09:11:04,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 09:11:04,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:04,069 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] [2020-10-29 09:11:04,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 09:11:04,069 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:04,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:04,070 INFO L82 PathProgramCache]: Analyzing trace with hash -143166156, now seen corresponding path program 1 times [2020-10-29 09:11:04,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:04,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788049195] [2020-10-29 09:11:04,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:04,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:04,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:04,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:04,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:04,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 09:11:04,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:04,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 633 [2020-10-29 09:11:04,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:04,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:04,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:11:04,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:04,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 09:11:04,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:04,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:04,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:04,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:04,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:04,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:04,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:04,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:04,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:04,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:04,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:04,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:04,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:04,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:04,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:04,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788049195] [2020-10-29 09:11:04,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:04,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:11:04,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234605320] [2020-10-29 09:11:04,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:11:04,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:04,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:11:04,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:11:04,908 INFO L87 Difference]: Start difference. First operand 199 states and 254 transitions. Second operand 9 states. [2020-10-29 09:11:05,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:05,463 INFO L93 Difference]: Finished difference Result 228 states and 289 transitions. [2020-10-29 09:11:05,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:11:05,464 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-10-29 09:11:05,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:05,466 INFO L225 Difference]: With dead ends: 228 [2020-10-29 09:11:05,466 INFO L226 Difference]: Without dead ends: 202 [2020-10-29 09:11:05,467 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 [2020-10-29 09:11:05,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-29 09:11:05,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2020-10-29 09:11:05,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-29 09:11:05,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 257 transitions. [2020-10-29 09:11:05,491 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 257 transitions. Word has length 36 [2020-10-29 09:11:05,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:05,491 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 257 transitions. [2020-10-29 09:11:05,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:11:05,491 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 257 transitions. [2020-10-29 09:11:05,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 09:11:05,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:05,492 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 09:11:05,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 09:11:05,493 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:05,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:05,493 INFO L82 PathProgramCache]: Analyzing trace with hash -2060301334, now seen corresponding path program 2 times [2020-10-29 09:11:05,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:05,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679073886] [2020-10-29 09:11:05,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:05,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:05,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:05,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:05,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:06,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:08,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:08,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 09:11:08,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:11:08,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2841 [2020-10-29 09:11:08,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:08,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:08,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:11:08,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:08,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:11:08,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:08,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:08,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:08,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:08,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:08,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:08,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:08,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:11:08,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:08,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:08,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:08,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:08,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:08,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:08,567 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:08,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679073886] [2020-10-29 09:11:08,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:08,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:11:08,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905309650] [2020-10-29 09:11:08,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:11:08,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:08,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:11:08,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:11:08,569 INFO L87 Difference]: Start difference. First operand 202 states and 257 transitions. Second operand 10 states. [2020-10-29 09:11:09,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:09,468 INFO L93 Difference]: Finished difference Result 260 states and 329 transitions. [2020-10-29 09:11:09,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:11:09,468 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-10-29 09:11:09,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:09,470 INFO L225 Difference]: With dead ends: 260 [2020-10-29 09:11:09,470 INFO L226 Difference]: Without dead ends: 220 [2020-10-29 09:11:09,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:11:09,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-29 09:11:09,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 201. [2020-10-29 09:11:09,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-29 09:11:09,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 255 transitions. [2020-10-29 09:11:09,492 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 255 transitions. Word has length 37 [2020-10-29 09:11:09,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:09,493 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 255 transitions. [2020-10-29 09:11:09,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:11:09,493 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 255 transitions. [2020-10-29 09:11:09,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 09:11:09,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:09,494 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] [2020-10-29 09:11:09,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 09:11:09,495 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:09,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:09,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1319445346, now seen corresponding path program 1 times [2020-10-29 09:11:09,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:09,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190009873] [2020-10-29 09:11:09,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:09,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:09,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:09,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:09,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:10,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:10,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 09:11:10,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:11:10,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 919 [2020-10-29 09:11:10,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:10,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:10,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:11:10,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:10,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:11:10,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:10,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:10,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:10,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:10,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:10,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:10,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:10,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:11:10,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:10,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:10,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:10,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:10,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:10,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:10,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:10,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190009873] [2020-10-29 09:11:10,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:10,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:11:10,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114116256] [2020-10-29 09:11:10,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:11:10,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:10,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:11:10,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:11:10,744 INFO L87 Difference]: Start difference. First operand 201 states and 255 transitions. Second operand 12 states. [2020-10-29 09:11:11,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:11,840 INFO L93 Difference]: Finished difference Result 261 states and 329 transitions. [2020-10-29 09:11:11,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:11:11,840 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-10-29 09:11:11,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:11,842 INFO L225 Difference]: With dead ends: 261 [2020-10-29 09:11:11,842 INFO L226 Difference]: Without dead ends: 249 [2020-10-29 09:11:11,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:11:11,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-29 09:11:11,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 197. [2020-10-29 09:11:11,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-29 09:11:11,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 250 transitions. [2020-10-29 09:11:11,870 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 250 transitions. Word has length 37 [2020-10-29 09:11:11,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:11,870 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 250 transitions. [2020-10-29 09:11:11,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:11:11,870 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 250 transitions. [2020-10-29 09:11:11,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:11:11,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:11,871 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-29 09:11:11,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 09:11:11,871 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:11,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:11,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1224846076, now seen corresponding path program 3 times [2020-10-29 09:11:11,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:11,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410079684] [2020-10-29 09:11:11,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:11,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:11,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:11,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:12,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:12,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:12,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:11:12,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:11:12,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 940 [2020-10-29 09:11:12,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:12,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:12,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:11:12,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:12,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 09:11:12,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:13,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:13,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:13,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:13,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:13,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:13,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:13,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:11:13,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:13,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:13,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:13,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:13,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:13,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:13,208 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:13,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410079684] [2020-10-29 09:11:13,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:13,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:11:13,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319217284] [2020-10-29 09:11:13,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:11:13,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:13,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:11:13,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:11:13,210 INFO L87 Difference]: Start difference. First operand 197 states and 250 transitions. Second operand 12 states. [2020-10-29 09:11:14,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:14,191 INFO L93 Difference]: Finished difference Result 319 states and 402 transitions. [2020-10-29 09:11:14,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:11:14,192 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-10-29 09:11:14,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:14,194 INFO L225 Difference]: With dead ends: 319 [2020-10-29 09:11:14,194 INFO L226 Difference]: Without dead ends: 271 [2020-10-29 09:11:14,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:11:14,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-10-29 09:11:14,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 224. [2020-10-29 09:11:14,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-29 09:11:14,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 284 transitions. [2020-10-29 09:11:14,217 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 284 transitions. Word has length 38 [2020-10-29 09:11:14,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:14,217 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 284 transitions. [2020-10-29 09:11:14,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:11:14,217 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 284 transitions. [2020-10-29 09:11:14,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:11:14,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:14,218 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-29 09:11:14,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 09:11:14,219 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:14,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:14,219 INFO L82 PathProgramCache]: Analyzing trace with hash 831819066, now seen corresponding path program 1 times [2020-10-29 09:11:14,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:14,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540623896] [2020-10-29 09:11:14,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:14,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:14,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:14,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:14,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:14,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:14,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:14,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:16,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:16,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:11:16,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:11:16,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2078 [2020-10-29 09:11:16,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:16,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:16,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:11:16,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:16,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 09:11:16,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:16,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:16,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:16,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:16,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:16,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:16,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:16,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:11:16,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:16,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:16,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:16,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:16,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:16,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:16,545 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:16,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540623896] [2020-10-29 09:11:16,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:16,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:11:16,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818208311] [2020-10-29 09:11:16,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:11:16,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:16,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:11:16,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:11:16,557 INFO L87 Difference]: Start difference. First operand 224 states and 284 transitions. Second operand 11 states. [2020-10-29 09:11:17,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:17,399 INFO L93 Difference]: Finished difference Result 281 states and 355 transitions. [2020-10-29 09:11:17,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:11:17,400 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2020-10-29 09:11:17,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:17,402 INFO L225 Difference]: With dead ends: 281 [2020-10-29 09:11:17,402 INFO L226 Difference]: Without dead ends: 226 [2020-10-29 09:11:17,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:11:17,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-29 09:11:17,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 223. [2020-10-29 09:11:17,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-29 09:11:17,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 280 transitions. [2020-10-29 09:11:17,432 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 280 transitions. Word has length 38 [2020-10-29 09:11:17,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:17,432 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 280 transitions. [2020-10-29 09:11:17,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:11:17,432 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 280 transitions. [2020-10-29 09:11:17,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:11:17,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:17,433 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-29 09:11:17,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 09:11:17,434 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:17,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:17,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1084297466, now seen corresponding path program 4 times [2020-10-29 09:11:17,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:17,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797407012] [2020-10-29 09:11:17,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:17,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:17,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:17,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:18,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:18,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:11:18,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:18,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 829 [2020-10-29 09:11:18,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:18,280 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:18,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:11:18,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:18,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:11:18,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:18,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:18,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:18,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:18,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:18,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:18,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:18,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:18,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:18,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:18,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:18,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:18,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:18,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:18,618 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:18,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797407012] [2020-10-29 09:11:18,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:18,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:11:18,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183625179] [2020-10-29 09:11:18,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:11:18,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:18,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:11:18,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:11:18,620 INFO L87 Difference]: Start difference. First operand 223 states and 280 transitions. Second operand 13 states. [2020-10-29 09:11:20,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:20,185 INFO L93 Difference]: Finished difference Result 297 states and 372 transitions. [2020-10-29 09:11:20,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:11:20,187 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-29 09:11:20,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:20,189 INFO L225 Difference]: With dead ends: 297 [2020-10-29 09:11:20,189 INFO L226 Difference]: Without dead ends: 293 [2020-10-29 09:11:20,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:11:20,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-10-29 09:11:20,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 237. [2020-10-29 09:11:20,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-29 09:11:20,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 298 transitions. [2020-10-29 09:11:20,216 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 298 transitions. Word has length 38 [2020-10-29 09:11:20,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:20,216 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 298 transitions. [2020-10-29 09:11:20,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:11:20,216 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 298 transitions. [2020-10-29 09:11:20,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:11:20,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:20,217 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:20,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 09:11:20,218 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:20,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:20,218 INFO L82 PathProgramCache]: Analyzing trace with hash -371147285, now seen corresponding path program 1 times [2020-10-29 09:11:20,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:20,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603553133] [2020-10-29 09:11:20,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:20,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:20,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:20,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:20,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:21,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:21,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:11:21,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:11:21,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1279 [2020-10-29 09:11:21,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:21,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:21,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:11:21,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:21,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:11:21,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:21,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:21,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:21,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:21,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:21,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:21,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:21,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:21,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:21,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:21,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:21,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:21,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:21,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:21,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:21,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603553133] [2020-10-29 09:11:21,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:21,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:11:21,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061061289] [2020-10-29 09:11:21,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:11:21,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:21,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:11:21,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:11:21,898 INFO L87 Difference]: Start difference. First operand 237 states and 298 transitions. Second operand 12 states. [2020-10-29 09:11:22,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:22,867 INFO L93 Difference]: Finished difference Result 294 states and 367 transitions. [2020-10-29 09:11:22,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:11:22,868 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-10-29 09:11:22,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:22,871 INFO L225 Difference]: With dead ends: 294 [2020-10-29 09:11:22,871 INFO L226 Difference]: Without dead ends: 290 [2020-10-29 09:11:22,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:11:22,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-10-29 09:11:22,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 237. [2020-10-29 09:11:22,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-29 09:11:22,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 298 transitions. [2020-10-29 09:11:22,896 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 298 transitions. Word has length 38 [2020-10-29 09:11:22,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:22,896 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 298 transitions. [2020-10-29 09:11:22,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:11:22,896 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 298 transitions. [2020-10-29 09:11:22,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 09:11:22,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:22,897 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:22,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 09:11:22,898 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:22,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:22,898 INFO L82 PathProgramCache]: Analyzing trace with hash -652309006, now seen corresponding path program 4 times [2020-10-29 09:11:22,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:22,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790996841] [2020-10-29 09:11:22,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:22,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:22,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:22,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:23,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:24,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:24,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 09:11:24,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:11:24,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1450 [2020-10-29 09:11:24,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:24,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:24,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:11:24,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:24,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 09:11:24,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:24,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:24,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:24,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:24,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:24,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:24,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:24,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:24,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:24,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:24,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:24,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:24,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:24,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:24,839 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:24,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790996841] [2020-10-29 09:11:24,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:24,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:11:24,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968719225] [2020-10-29 09:11:24,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:11:24,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:24,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:11:24,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:11:24,841 INFO L87 Difference]: Start difference. First operand 237 states and 298 transitions. Second operand 13 states. [2020-10-29 09:11:25,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:25,826 INFO L93 Difference]: Finished difference Result 276 states and 347 transitions. [2020-10-29 09:11:25,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:11:25,827 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-10-29 09:11:25,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:25,830 INFO L225 Difference]: With dead ends: 276 [2020-10-29 09:11:25,830 INFO L226 Difference]: Without dead ends: 272 [2020-10-29 09:11:25,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:11:25,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-29 09:11:25,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 232. [2020-10-29 09:11:25,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-29 09:11:25,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 290 transitions. [2020-10-29 09:11:25,854 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 290 transitions. Word has length 39 [2020-10-29 09:11:25,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:25,855 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 290 transitions. [2020-10-29 09:11:25,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:11:25,855 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 290 transitions. [2020-10-29 09:11:25,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 09:11:25,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:25,856 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, 1, 1] [2020-10-29 09:11:25,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 09:11:25,856 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:25,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:25,857 INFO L82 PathProgramCache]: Analyzing trace with hash -684599341, now seen corresponding path program 2 times [2020-10-29 09:11:25,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:25,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750317107] [2020-10-29 09:11:25,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:25,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:25,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:26,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:27,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:27,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 09:11:27,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:27,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1764 [2020-10-29 09:11:27,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:27,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:27,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:11:27,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:27,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 09:11:27,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:28,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:28,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:28,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:28,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:28,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:28,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:28,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:11:28,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:28,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:28,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:28,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:28,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:28,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:28,057 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:28,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1750317107] [2020-10-29 09:11:28,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:28,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:11:28,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350956607] [2020-10-29 09:11:28,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:11:28,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:28,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:11:28,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:11:28,060 INFO L87 Difference]: Start difference. First operand 232 states and 290 transitions. Second operand 12 states. [2020-10-29 09:11:29,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:29,076 INFO L93 Difference]: Finished difference Result 290 states and 360 transitions. [2020-10-29 09:11:29,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:11:29,085 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-29 09:11:29,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:29,086 INFO L225 Difference]: With dead ends: 290 [2020-10-29 09:11:29,086 INFO L226 Difference]: Without dead ends: 286 [2020-10-29 09:11:29,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:11:29,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-10-29 09:11:29,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 223. [2020-10-29 09:11:29,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-29 09:11:29,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 281 transitions. [2020-10-29 09:11:29,116 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 281 transitions. Word has length 39 [2020-10-29 09:11:29,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:29,116 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 281 transitions. [2020-10-29 09:11:29,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:11:29,116 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 281 transitions. [2020-10-29 09:11:29,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:11:29,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:29,124 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:29,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 09:11:29,124 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:29,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:29,124 INFO L82 PathProgramCache]: Analyzing trace with hash -2143124991, now seen corresponding path program 1 times [2020-10-29 09:11:29,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:29,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299318481] [2020-10-29 09:11:29,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:29,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:29,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:29,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:30,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:30,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:11:30,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:30,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1373 [2020-10-29 09:11:30,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:30,510 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:30,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:11:30,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:30,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 09:11:30,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:31,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:31,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:31,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:31,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:31,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:31,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:31,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:11:31,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:31,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:31,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:31,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:31,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:31,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:31,175 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:31,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299318481] [2020-10-29 09:11:31,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:31,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:11:31,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951784885] [2020-10-29 09:11:31,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:11:31,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:31,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:11:31,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:11:31,177 INFO L87 Difference]: Start difference. First operand 223 states and 281 transitions. Second operand 13 states. [2020-10-29 09:11:32,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:32,837 INFO L93 Difference]: Finished difference Result 278 states and 346 transitions. [2020-10-29 09:11:32,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:11:32,838 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-10-29 09:11:32,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:32,839 INFO L225 Difference]: With dead ends: 278 [2020-10-29 09:11:32,840 INFO L226 Difference]: Without dead ends: 274 [2020-10-29 09:11:32,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:11:32,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-29 09:11:32,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 229. [2020-10-29 09:11:32,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-29 09:11:32,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 288 transitions. [2020-10-29 09:11:32,867 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 288 transitions. Word has length 40 [2020-10-29 09:11:32,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:32,867 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 288 transitions. [2020-10-29 09:11:32,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:11:32,867 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 288 transitions. [2020-10-29 09:11:32,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:11:32,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:32,868 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:32,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-29 09:11:32,869 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:32,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:32,869 INFO L82 PathProgramCache]: Analyzing trace with hash 483964986, now seen corresponding path program 1 times [2020-10-29 09:11:32,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:32,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82829472] [2020-10-29 09:11:32,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:32,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:32,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:32,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:33,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:33,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:11:33,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:33,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 685 [2020-10-29 09:11:33,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:33,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:33,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:11:33,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:33,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 09:11:33,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:33,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:33,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:33,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:33,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:33,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:33,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:33,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:33,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:33,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:33,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:33,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:33,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:33,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:33,811 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:33,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [82829472] [2020-10-29 09:11:33,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:33,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:11:33,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397851948] [2020-10-29 09:11:33,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:11:33,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:33,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:11:33,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:11:33,813 INFO L87 Difference]: Start difference. First operand 229 states and 288 transitions. Second operand 11 states. [2020-10-29 09:11:35,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:35,046 INFO L93 Difference]: Finished difference Result 287 states and 360 transitions. [2020-10-29 09:11:35,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:11:35,047 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-10-29 09:11:35,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:35,049 INFO L225 Difference]: With dead ends: 287 [2020-10-29 09:11:35,049 INFO L226 Difference]: Without dead ends: 251 [2020-10-29 09:11:35,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:11:35,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-29 09:11:35,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 243. [2020-10-29 09:11:35,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-10-29 09:11:35,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 306 transitions. [2020-10-29 09:11:35,072 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 306 transitions. Word has length 40 [2020-10-29 09:11:35,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:35,073 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 306 transitions. [2020-10-29 09:11:35,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:11:35,073 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 306 transitions. [2020-10-29 09:11:35,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 09:11:35,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:35,074 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:35,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-29 09:11:35,074 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:35,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:35,075 INFO L82 PathProgramCache]: Analyzing trace with hash 2060986365, now seen corresponding path program 5 times [2020-10-29 09:11:35,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:35,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683289892] [2020-10-29 09:11:35,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:35,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:35,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:35,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:35,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:36,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:36,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 09:11:36,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:11:36,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1099 [2020-10-29 09:11:36,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:36,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:36,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:11:36,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:36,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 09:11:36,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:36,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:36,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:36,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:36,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:36,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:36,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:36,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:36,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:36,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:36,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:36,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:36,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:36,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:36,591 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:36,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683289892] [2020-10-29 09:11:36,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:36,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:11:36,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931719718] [2020-10-29 09:11:36,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:11:36,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:36,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:11:36,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:11:36,593 INFO L87 Difference]: Start difference. First operand 243 states and 306 transitions. Second operand 13 states. [2020-10-29 09:11:38,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:38,612 INFO L93 Difference]: Finished difference Result 315 states and 397 transitions. [2020-10-29 09:11:38,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:11:38,612 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-10-29 09:11:38,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:38,615 INFO L225 Difference]: With dead ends: 315 [2020-10-29 09:11:38,615 INFO L226 Difference]: Without dead ends: 311 [2020-10-29 09:11:38,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:11:38,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-10-29 09:11:38,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 264. [2020-10-29 09:11:38,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-29 09:11:38,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 336 transitions. [2020-10-29 09:11:38,645 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 336 transitions. Word has length 41 [2020-10-29 09:11:38,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:38,645 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 336 transitions. [2020-10-29 09:11:38,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:11:38,645 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 336 transitions. [2020-10-29 09:11:38,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 09:11:38,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:38,646 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:38,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-29 09:11:38,647 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:38,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:38,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1807404787, now seen corresponding path program 1 times [2020-10-29 09:11:38,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:38,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439770902] [2020-10-29 09:11:38,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:38,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:38,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:38,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:38,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:40,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:40,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 09:11:40,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:11:40,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2267 [2020-10-29 09:11:40,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:40,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:40,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:11:40,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:40,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:11:40,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:41,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:41,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:41,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:41,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:41,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:41,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:41,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:41,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:41,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:41,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:41,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:41,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:41,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:41,522 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:41,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439770902] [2020-10-29 09:11:41,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:41,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:11:41,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254604857] [2020-10-29 09:11:41,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:11:41,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:41,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:11:41,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:11:41,524 INFO L87 Difference]: Start difference. First operand 264 states and 336 transitions. Second operand 13 states. [2020-10-29 09:11:43,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:43,193 INFO L93 Difference]: Finished difference Result 312 states and 392 transitions. [2020-10-29 09:11:43,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:11:43,194 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-10-29 09:11:43,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:43,196 INFO L225 Difference]: With dead ends: 312 [2020-10-29 09:11:43,196 INFO L226 Difference]: Without dead ends: 300 [2020-10-29 09:11:43,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:11:43,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-10-29 09:11:43,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 264. [2020-10-29 09:11:43,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-29 09:11:43,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 335 transitions. [2020-10-29 09:11:43,227 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 335 transitions. Word has length 41 [2020-10-29 09:11:43,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:43,227 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 335 transitions. [2020-10-29 09:11:43,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:11:43,228 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 335 transitions. [2020-10-29 09:11:43,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 09:11:43,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:43,229 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:43,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-29 09:11:43,229 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:43,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:43,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1384077270, now seen corresponding path program 1 times [2020-10-29 09:11:43,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:43,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181618427] [2020-10-29 09:11:43,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:43,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:43,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:43,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 09:11:43,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:43,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-29 09:11:43,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:43,349 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:43,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:11:43,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 09:11:43,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 09:11:43,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:43,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:43,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:43,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:43,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:43,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:43,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:43,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:43,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:43,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:43,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:43,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:43,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:43,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:43,389 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-29 09:11:43,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181618427] [2020-10-29 09:11:43,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:11:43,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:11:43,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087499822] [2020-10-29 09:11:43,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:11:43,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:43,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:11:43,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:11:43,391 INFO L87 Difference]: Start difference. First operand 264 states and 335 transitions. Second operand 4 states. [2020-10-29 09:11:43,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:43,585 INFO L93 Difference]: Finished difference Result 433 states and 547 transitions. [2020-10-29 09:11:43,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:11:43,586 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-10-29 09:11:43,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:43,588 INFO L225 Difference]: With dead ends: 433 [2020-10-29 09:11:43,588 INFO L226 Difference]: Without dead ends: 237 [2020-10-29 09:11:43,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:11:43,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-29 09:11:43,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 236. [2020-10-29 09:11:43,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-10-29 09:11:43,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 289 transitions. [2020-10-29 09:11:43,614 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 289 transitions. Word has length 41 [2020-10-29 09:11:43,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:43,615 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 289 transitions. [2020-10-29 09:11:43,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:11:43,615 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 289 transitions. [2020-10-29 09:11:43,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 09:11:43,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:43,616 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:43,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-29 09:11:43,616 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:43,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:43,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1819325621, now seen corresponding path program 1 times [2020-10-29 09:11:43,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:43,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186197162] [2020-10-29 09:11:43,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:43,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:43,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:44,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:44,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 09:11:44,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:44,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 580 [2020-10-29 09:11:44,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:44,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:44,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:11:44,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:44,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 09:11:44,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:44,483 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 40 [2020-10-29 09:11:44,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:44,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:44,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:44,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:44,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:44,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:44,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:44,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:44,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:44,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:44,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:44,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:44,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:44,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:44,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186197162] [2020-10-29 09:11:44,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:44,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:11:44,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133142184] [2020-10-29 09:11:44,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:11:44,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:44,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:11:44,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:11:44,628 INFO L87 Difference]: Start difference. First operand 236 states and 289 transitions. Second operand 12 states. [2020-10-29 09:11:45,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:45,284 INFO L93 Difference]: Finished difference Result 294 states and 359 transitions. [2020-10-29 09:11:45,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:11:45,285 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2020-10-29 09:11:45,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:45,286 INFO L225 Difference]: With dead ends: 294 [2020-10-29 09:11:45,286 INFO L226 Difference]: Without dead ends: 271 [2020-10-29 09:11:45,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:11:45,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-10-29 09:11:45,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 252. [2020-10-29 09:11:45,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-29 09:11:45,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 306 transitions. [2020-10-29 09:11:45,315 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 306 transitions. Word has length 42 [2020-10-29 09:11:45,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:45,315 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 306 transitions. [2020-10-29 09:11:45,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:11:45,315 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 306 transitions. [2020-10-29 09:11:45,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 09:11:45,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:45,316 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:45,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-29 09:11:45,316 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:45,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:45,317 INFO L82 PathProgramCache]: Analyzing trace with hash 2144312884, now seen corresponding path program 1 times [2020-10-29 09:11:45,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:45,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1057047341] [2020-10-29 09:11:45,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:45,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:45,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:45,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:46,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:47,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:47,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 09:11:47,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:11:47,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2545 [2020-10-29 09:11:47,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:47,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:47,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:11:47,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:47,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 09:11:47,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:48,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:48,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:48,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:48,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:48,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:48,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:48,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:48,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:48,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:48,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:48,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:48,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:48,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:48,391 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:48,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1057047341] [2020-10-29 09:11:48,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:48,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:11:48,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243207401] [2020-10-29 09:11:48,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:11:48,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:48,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:11:48,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:11:48,393 INFO L87 Difference]: Start difference. First operand 252 states and 306 transitions. Second operand 13 states. [2020-10-29 09:11:50,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:50,306 INFO L93 Difference]: Finished difference Result 312 states and 378 transitions. [2020-10-29 09:11:50,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:11:50,307 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-10-29 09:11:50,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:50,309 INFO L225 Difference]: With dead ends: 312 [2020-10-29 09:11:50,309 INFO L226 Difference]: Without dead ends: 308 [2020-10-29 09:11:50,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:11:50,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-10-29 09:11:50,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 246. [2020-10-29 09:11:50,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-29 09:11:50,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 300 transitions. [2020-10-29 09:11:50,342 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 300 transitions. Word has length 42 [2020-10-29 09:11:50,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:50,343 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 300 transitions. [2020-10-29 09:11:50,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:11:50,343 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 300 transitions. [2020-10-29 09:11:50,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 09:11:50,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:50,344 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:50,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-29 09:11:50,344 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:50,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:50,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1318619581, now seen corresponding path program 1 times [2020-10-29 09:11:50,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:50,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977320010] [2020-10-29 09:11:50,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:50,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:50,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:51,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:52,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:52,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 09:11:52,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:11:52,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1613 [2020-10-29 09:11:52,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:52,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:52,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:11:52,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:52,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:11:52,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:52,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:52,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:52,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:52,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:52,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:52,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:52,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:11:52,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:52,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:52,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:52,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:52,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:52,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:52,602 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:52,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977320010] [2020-10-29 09:11:52,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:52,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:11:52,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351858613] [2020-10-29 09:11:52,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:11:52,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:52,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:11:52,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:11:52,604 INFO L87 Difference]: Start difference. First operand 246 states and 300 transitions. Second operand 12 states. [2020-10-29 09:11:53,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:53,340 INFO L93 Difference]: Finished difference Result 381 states and 470 transitions. [2020-10-29 09:11:53,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:11:53,341 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2020-10-29 09:11:53,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:53,343 INFO L225 Difference]: With dead ends: 381 [2020-10-29 09:11:53,343 INFO L226 Difference]: Without dead ends: 286 [2020-10-29 09:11:53,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:11:53,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-10-29 09:11:53,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 243. [2020-10-29 09:11:53,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-10-29 09:11:53,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 293 transitions. [2020-10-29 09:11:53,372 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 293 transitions. Word has length 42 [2020-10-29 09:11:53,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:53,372 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 293 transitions. [2020-10-29 09:11:53,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:11:53,372 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 293 transitions. [2020-10-29 09:11:53,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 09:11:53,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:53,373 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 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] [2020-10-29 09:11:53,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-29 09:11:53,374 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:53,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:53,374 INFO L82 PathProgramCache]: Analyzing trace with hash 659977859, now seen corresponding path program 1 times [2020-10-29 09:11:53,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:53,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1679554318] [2020-10-29 09:11:53,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:53,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:53,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:54,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:54,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 09:11:54,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:54,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1341 [2020-10-29 09:11:54,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:54,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:54,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:11:54,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:54,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 09:11:54,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:55,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:55,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:55,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:55,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:55,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:55,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:55,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:55,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:55,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:55,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:55,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:55,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:55,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:55,413 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:55,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1679554318] [2020-10-29 09:11:55,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:55,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:11:55,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078151162] [2020-10-29 09:11:55,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:11:55,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:55,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:11:55,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:11:55,414 INFO L87 Difference]: Start difference. First operand 243 states and 293 transitions. Second operand 14 states. [2020-10-29 09:11:57,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:11:57,272 INFO L93 Difference]: Finished difference Result 334 states and 407 transitions. [2020-10-29 09:11:57,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:11:57,272 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-10-29 09:11:57,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:11:57,274 INFO L225 Difference]: With dead ends: 334 [2020-10-29 09:11:57,274 INFO L226 Difference]: Without dead ends: 330 [2020-10-29 09:11:57,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:11:57,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-10-29 09:11:57,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 277. [2020-10-29 09:11:57,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-29 09:11:57,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 336 transitions. [2020-10-29 09:11:57,305 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 336 transitions. Word has length 42 [2020-10-29 09:11:57,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:11:57,306 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 336 transitions. [2020-10-29 09:11:57,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:11:57,306 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 336 transitions. [2020-10-29 09:11:57,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 09:11:57,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:11:57,307 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:11:57,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-29 09:11:57,307 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:11:57,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:11:57,308 INFO L82 PathProgramCache]: Analyzing trace with hash 2068813507, now seen corresponding path program 2 times [2020-10-29 09:11:57,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:11:57,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885398573] [2020-10-29 09:11:57,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:11:57,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:57,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:58,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:58,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 09:11:58,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:58,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1026 [2020-10-29 09:11:58,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:58,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:58,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:11:58,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:11:58,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 09:11:58,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:58,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:11:58,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:11:58,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:11:58,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:11:58,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:11:58,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:11:58,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:11:58,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:11:58,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:11:58,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:11:58,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:11:58,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:11:58,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:11:58,906 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:11:58,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885398573] [2020-10-29 09:11:58,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:11:58,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:11:58,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607463539] [2020-10-29 09:11:58,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:11:58,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:11:58,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:11:58,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:11:58,908 INFO L87 Difference]: Start difference. First operand 277 states and 336 transitions. Second operand 13 states. [2020-10-29 09:12:00,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:00,088 INFO L93 Difference]: Finished difference Result 377 states and 460 transitions. [2020-10-29 09:12:00,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:12:00,088 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-10-29 09:12:00,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:00,090 INFO L225 Difference]: With dead ends: 377 [2020-10-29 09:12:00,090 INFO L226 Difference]: Without dead ends: 326 [2020-10-29 09:12:00,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:12:00,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-10-29 09:12:00,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 291. [2020-10-29 09:12:00,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2020-10-29 09:12:00,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 352 transitions. [2020-10-29 09:12:00,122 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 352 transitions. Word has length 42 [2020-10-29 09:12:00,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:00,122 INFO L481 AbstractCegarLoop]: Abstraction has 291 states and 352 transitions. [2020-10-29 09:12:00,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:12:00,122 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 352 transitions. [2020-10-29 09:12:00,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 09:12:00,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:00,123 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:00,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-29 09:12:00,124 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:00,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:00,124 INFO L82 PathProgramCache]: Analyzing trace with hash 89322175, now seen corresponding path program 1 times [2020-10-29 09:12:00,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:00,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630506209] [2020-10-29 09:12:00,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:00,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:00,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:00,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:01,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:01,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 09:12:01,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:12:01,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 991 [2020-10-29 09:12:01,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:01,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:01,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:12:01,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:01,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 09:12:01,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:01,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:01,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:01,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:01,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:01,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:01,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:01,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:01,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:01,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:01,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:01,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:01,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:01,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:01,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:01,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630506209] [2020-10-29 09:12:01,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:01,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:12:01,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757004452] [2020-10-29 09:12:01,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:12:01,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:01,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:12:01,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:12:01,349 INFO L87 Difference]: Start difference. First operand 291 states and 352 transitions. Second operand 12 states. [2020-10-29 09:12:02,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:02,032 INFO L93 Difference]: Finished difference Result 313 states and 377 transitions. [2020-10-29 09:12:02,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:12:02,033 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-10-29 09:12:02,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:02,035 INFO L225 Difference]: With dead ends: 313 [2020-10-29 09:12:02,035 INFO L226 Difference]: Without dead ends: 309 [2020-10-29 09:12:02,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:12:02,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-29 09:12:02,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 295. [2020-10-29 09:12:02,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-10-29 09:12:02,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 356 transitions. [2020-10-29 09:12:02,066 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 356 transitions. Word has length 43 [2020-10-29 09:12:02,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:02,066 INFO L481 AbstractCegarLoop]: Abstraction has 295 states and 356 transitions. [2020-10-29 09:12:02,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:12:02,066 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 356 transitions. [2020-10-29 09:12:02,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-29 09:12:02,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:02,068 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2020-10-29 09:12:02,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-29 09:12:02,068 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:02,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:02,068 INFO L82 PathProgramCache]: Analyzing trace with hash -389947496, now seen corresponding path program 3 times [2020-10-29 09:12:02,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:02,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662549939] [2020-10-29 09:12:02,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:02,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:02,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:02,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:03,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:03,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:07,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:07,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 09:12:07,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:12:07,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-29 09:12:07,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:07,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:07,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:12:07,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:07,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 09:12:07,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:07,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:07,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:07,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:07,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:07,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:07,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:07,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:12:07,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:07,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:07,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:07,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:07,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:07,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:07,428 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 09:12:07,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662549939] [2020-10-29 09:12:07,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:07,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:12:07,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698553493] [2020-10-29 09:12:07,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:12:07,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:07,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:12:07,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:12:07,429 INFO L87 Difference]: Start difference. First operand 295 states and 356 transitions. Second operand 12 states. [2020-10-29 09:12:08,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:08,418 INFO L93 Difference]: Finished difference Result 376 states and 457 transitions. [2020-10-29 09:12:08,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:12:08,418 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2020-10-29 09:12:08,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:08,421 INFO L225 Difference]: With dead ends: 376 [2020-10-29 09:12:08,421 INFO L226 Difference]: Without dead ends: 326 [2020-10-29 09:12:08,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:12:08,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-10-29 09:12:08,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 295. [2020-10-29 09:12:08,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-10-29 09:12:08,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 355 transitions. [2020-10-29 09:12:08,454 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 355 transitions. Word has length 44 [2020-10-29 09:12:08,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:08,454 INFO L481 AbstractCegarLoop]: Abstraction has 295 states and 355 transitions. [2020-10-29 09:12:08,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:12:08,454 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 355 transitions. [2020-10-29 09:12:08,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-29 09:12:08,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:08,455 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2020-10-29 09:12:08,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-29 09:12:08,456 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:08,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:08,456 INFO L82 PathProgramCache]: Analyzing trace with hash 586411992, now seen corresponding path program 4 times [2020-10-29 09:12:08,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:08,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1603752411] [2020-10-29 09:12:08,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:08,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:08,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:08,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:09,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:11,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:11,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 09:12:11,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:12:11,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2785 [2020-10-29 09:12:11,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:11,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:11,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:12:11,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:11,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 09:12:11,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:11,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:11,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:11,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:11,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:11,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:11,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:11,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:12:11,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:11,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:11,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:11,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:11,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:11,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:11,657 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:11,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1603752411] [2020-10-29 09:12:11,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:11,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:12:11,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281064223] [2020-10-29 09:12:11,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:12:11,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:11,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:12:11,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:12:11,658 INFO L87 Difference]: Start difference. First operand 295 states and 355 transitions. Second operand 12 states. [2020-10-29 09:12:12,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:12,892 INFO L93 Difference]: Finished difference Result 369 states and 443 transitions. [2020-10-29 09:12:12,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:12:12,893 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2020-10-29 09:12:12,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:12,895 INFO L225 Difference]: With dead ends: 369 [2020-10-29 09:12:12,896 INFO L226 Difference]: Without dead ends: 328 [2020-10-29 09:12:12,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:12:12,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-29 09:12:12,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 294. [2020-10-29 09:12:12,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-10-29 09:12:12,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 353 transitions. [2020-10-29 09:12:12,931 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 353 transitions. Word has length 44 [2020-10-29 09:12:12,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:12,931 INFO L481 AbstractCegarLoop]: Abstraction has 294 states and 353 transitions. [2020-10-29 09:12:12,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:12:12,931 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 353 transitions. [2020-10-29 09:12:12,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 09:12:12,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:12,933 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:12,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-29 09:12:12,933 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:12,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:12,933 INFO L82 PathProgramCache]: Analyzing trace with hash 12073588, now seen corresponding path program 1 times [2020-10-29 09:12:12,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:12,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270605806] [2020-10-29 09:12:12,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:12,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:12,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:13,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:13,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:14,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:14,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 09:12:14,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:12:14,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1585 [2020-10-29 09:12:14,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:14,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:14,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:12:14,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:14,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 09:12:14,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:14,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:14,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:14,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:14,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:14,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:14,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:14,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:12:14,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:14,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:14,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:14,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:14,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:14,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:14,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:14,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270605806] [2020-10-29 09:12:14,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:14,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:12:14,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106597383] [2020-10-29 09:12:14,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:12:14,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:14,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:12:14,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:12:14,841 INFO L87 Difference]: Start difference. First operand 294 states and 353 transitions. Second operand 12 states. [2020-10-29 09:12:15,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:15,815 INFO L93 Difference]: Finished difference Result 312 states and 373 transitions. [2020-10-29 09:12:15,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:12:15,816 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-10-29 09:12:15,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:15,818 INFO L225 Difference]: With dead ends: 312 [2020-10-29 09:12:15,819 INFO L226 Difference]: Without dead ends: 308 [2020-10-29 09:12:15,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:12:15,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-10-29 09:12:15,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 296. [2020-10-29 09:12:15,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-10-29 09:12:15,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 355 transitions. [2020-10-29 09:12:15,852 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 355 transitions. Word has length 45 [2020-10-29 09:12:15,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:15,852 INFO L481 AbstractCegarLoop]: Abstraction has 296 states and 355 transitions. [2020-10-29 09:12:15,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:12:15,853 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 355 transitions. [2020-10-29 09:12:15,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 09:12:15,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:15,854 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 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] [2020-10-29 09:12:15,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-29 09:12:15,854 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:15,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:15,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1753799446, now seen corresponding path program 5 times [2020-10-29 09:12:15,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:15,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579902540] [2020-10-29 09:12:15,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:15,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:16,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:16,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:17,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:17,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 09:12:17,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:12:17,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1797 [2020-10-29 09:12:17,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:17,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:17,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:12:17,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:17,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 09:12:17,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:18,035 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2020-10-29 09:12:18,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:18,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:18,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:18,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:18,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:18,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:18,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:18,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:18,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:18,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:18,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:18,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:18,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:18,281 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:18,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579902540] [2020-10-29 09:12:18,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:18,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:12:18,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755159279] [2020-10-29 09:12:18,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:12:18,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:18,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:12:18,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:12:18,282 INFO L87 Difference]: Start difference. First operand 296 states and 355 transitions. Second operand 13 states. [2020-10-29 09:12:19,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:19,468 INFO L93 Difference]: Finished difference Result 369 states and 444 transitions. [2020-10-29 09:12:19,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:12:19,469 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2020-10-29 09:12:19,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:19,471 INFO L225 Difference]: With dead ends: 369 [2020-10-29 09:12:19,471 INFO L226 Difference]: Without dead ends: 328 [2020-10-29 09:12:19,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:12:19,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-29 09:12:19,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 296. [2020-10-29 09:12:19,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-10-29 09:12:19,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 354 transitions. [2020-10-29 09:12:19,509 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 354 transitions. Word has length 45 [2020-10-29 09:12:19,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:19,510 INFO L481 AbstractCegarLoop]: Abstraction has 296 states and 354 transitions. [2020-10-29 09:12:19,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:12:19,510 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 354 transitions. [2020-10-29 09:12:19,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 09:12:19,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:19,511 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:19,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-29 09:12:19,511 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:19,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:19,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1956172502, now seen corresponding path program 6 times [2020-10-29 09:12:19,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:19,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878512090] [2020-10-29 09:12:19,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:19,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:19,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:20,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:20,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 09:12:20,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:20,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1254 [2020-10-29 09:12:20,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:20,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:20,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:12:20,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:20,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 09:12:20,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:21,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:21,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:21,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:21,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:21,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:21,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:21,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:21,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:21,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:21,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:21,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:21,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:21,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:21,406 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:21,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878512090] [2020-10-29 09:12:21,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:21,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:12:21,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756337465] [2020-10-29 09:12:21,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:12:21,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:21,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:12:21,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:12:21,408 INFO L87 Difference]: Start difference. First operand 296 states and 354 transitions. Second operand 15 states. [2020-10-29 09:12:23,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:23,713 INFO L93 Difference]: Finished difference Result 380 states and 454 transitions. [2020-10-29 09:12:23,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 09:12:23,714 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2020-10-29 09:12:23,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:23,716 INFO L225 Difference]: With dead ends: 380 [2020-10-29 09:12:23,716 INFO L226 Difference]: Without dead ends: 376 [2020-10-29 09:12:23,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:12:23,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-10-29 09:12:23,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 287. [2020-10-29 09:12:23,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-10-29 09:12:23,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 345 transitions. [2020-10-29 09:12:23,752 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 345 transitions. Word has length 45 [2020-10-29 09:12:23,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:23,753 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 345 transitions. [2020-10-29 09:12:23,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:12:23,753 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 345 transitions. [2020-10-29 09:12:23,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 09:12:23,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:23,754 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 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] [2020-10-29 09:12:23,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-29 09:12:23,754 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:23,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:23,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1462064490, now seen corresponding path program 7 times [2020-10-29 09:12:23,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:23,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855133100] [2020-10-29 09:12:23,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:23,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:23,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:24,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:24,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 09:12:24,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:24,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1126 [2020-10-29 09:12:24,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:24,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:24,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:12:24,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:24,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 09:12:24,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:25,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:25,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:25,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:25,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:25,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:25,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:25,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:25,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:25,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:25,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:25,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:25,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:25,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:25,432 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:25,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855133100] [2020-10-29 09:12:25,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:25,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:12:25,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776755483] [2020-10-29 09:12:25,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:12:25,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:25,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:12:25,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:12:25,433 INFO L87 Difference]: Start difference. First operand 287 states and 345 transitions. Second operand 14 states. [2020-10-29 09:12:26,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:26,742 INFO L93 Difference]: Finished difference Result 396 states and 476 transitions. [2020-10-29 09:12:26,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:12:26,742 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2020-10-29 09:12:26,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:26,744 INFO L225 Difference]: With dead ends: 396 [2020-10-29 09:12:26,745 INFO L226 Difference]: Without dead ends: 359 [2020-10-29 09:12:26,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:12:26,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-10-29 09:12:26,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 306. [2020-10-29 09:12:26,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-10-29 09:12:26,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 367 transitions. [2020-10-29 09:12:26,782 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 367 transitions. Word has length 45 [2020-10-29 09:12:26,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:26,782 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 367 transitions. [2020-10-29 09:12:26,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:12:26,782 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 367 transitions. [2020-10-29 09:12:26,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 09:12:26,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:26,783 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 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] [2020-10-29 09:12:26,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-29 09:12:26,783 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:26,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:26,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1855091500, now seen corresponding path program 1 times [2020-10-29 09:12:26,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:26,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542136397] [2020-10-29 09:12:26,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:26,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:26,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:26,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:27,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:28,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:30,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:30,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 09:12:30,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:12:30,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3970 [2020-10-29 09:12:30,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:30,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:30,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:12:30,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:30,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 09:12:30,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:31,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:31,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:31,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:31,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:31,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:31,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:31,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:31,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:31,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:31,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:31,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:31,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:31,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:31,097 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:31,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542136397] [2020-10-29 09:12:31,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:31,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:12:31,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440261224] [2020-10-29 09:12:31,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:12:31,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:31,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:12:31,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:12:31,099 INFO L87 Difference]: Start difference. First operand 306 states and 367 transitions. Second operand 13 states. [2020-10-29 09:12:32,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:32,307 INFO L93 Difference]: Finished difference Result 379 states and 456 transitions. [2020-10-29 09:12:32,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:12:32,308 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2020-10-29 09:12:32,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:32,310 INFO L225 Difference]: With dead ends: 379 [2020-10-29 09:12:32,310 INFO L226 Difference]: Without dead ends: 335 [2020-10-29 09:12:32,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:12:32,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-29 09:12:32,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 309. [2020-10-29 09:12:32,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2020-10-29 09:12:32,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 367 transitions. [2020-10-29 09:12:32,343 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 367 transitions. Word has length 45 [2020-10-29 09:12:32,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:32,343 INFO L481 AbstractCegarLoop]: Abstraction has 309 states and 367 transitions. [2020-10-29 09:12:32,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:12:32,343 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 367 transitions. [2020-10-29 09:12:32,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 09:12:32,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:32,344 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:32,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-29 09:12:32,345 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:32,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:32,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1724856960, now seen corresponding path program 2 times [2020-10-29 09:12:32,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:32,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532871227] [2020-10-29 09:12:32,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:32,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:32,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:33,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:33,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 09:12:33,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:33,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 950 [2020-10-29 09:12:33,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:33,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:33,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:12:33,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:33,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 09:12:33,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:33,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:33,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:33,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:33,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:33,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:33,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:33,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:33,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:33,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:33,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:33,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:33,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:33,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:33,678 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:33,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532871227] [2020-10-29 09:12:33,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:33,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:12:33,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389653966] [2020-10-29 09:12:33,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:12:33,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:33,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:12:33,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:12:33,680 INFO L87 Difference]: Start difference. First operand 309 states and 367 transitions. Second operand 13 states. [2020-10-29 09:12:34,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:34,677 INFO L93 Difference]: Finished difference Result 365 states and 434 transitions. [2020-10-29 09:12:34,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:12:34,678 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-10-29 09:12:34,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:34,680 INFO L225 Difference]: With dead ends: 365 [2020-10-29 09:12:34,680 INFO L226 Difference]: Without dead ends: 341 [2020-10-29 09:12:34,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:12:34,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-10-29 09:12:34,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 321. [2020-10-29 09:12:34,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2020-10-29 09:12:34,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 380 transitions. [2020-10-29 09:12:34,721 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 380 transitions. Word has length 46 [2020-10-29 09:12:34,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:34,721 INFO L481 AbstractCegarLoop]: Abstraction has 321 states and 380 transitions. [2020-10-29 09:12:34,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:12:34,721 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 380 transitions. [2020-10-29 09:12:34,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 09:12:34,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:34,722 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:34,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-29 09:12:34,723 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:34,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:34,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1593562062, now seen corresponding path program 1 times [2020-10-29 09:12:34,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:34,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735527365] [2020-10-29 09:12:34,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:34,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:34,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:35,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:35,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 09:12:35,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:35,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 613 [2020-10-29 09:12:35,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:35,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:35,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:12:35,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:35,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 09:12:35,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:35,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:35,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:35,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:35,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:35,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:35,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:35,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:35,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:35,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:35,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:35,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:35,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:35,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:35,849 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:35,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735527365] [2020-10-29 09:12:35,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:35,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:12:35,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402065565] [2020-10-29 09:12:35,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:12:35,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:35,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:12:35,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:12:35,851 INFO L87 Difference]: Start difference. First operand 321 states and 380 transitions. Second operand 14 states. [2020-10-29 09:12:37,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:37,640 INFO L93 Difference]: Finished difference Result 383 states and 454 transitions. [2020-10-29 09:12:37,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:12:37,641 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2020-10-29 09:12:37,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:37,643 INFO L225 Difference]: With dead ends: 383 [2020-10-29 09:12:37,643 INFO L226 Difference]: Without dead ends: 379 [2020-10-29 09:12:37,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:12:37,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2020-10-29 09:12:37,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 330. [2020-10-29 09:12:37,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-10-29 09:12:37,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 391 transitions. [2020-10-29 09:12:37,680 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 391 transitions. Word has length 46 [2020-10-29 09:12:37,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:37,680 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 391 transitions. [2020-10-29 09:12:37,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:12:37,681 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 391 transitions. [2020-10-29 09:12:37,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 09:12:37,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:37,682 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:37,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-29 09:12:37,682 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:37,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:37,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1200535052, now seen corresponding path program 1 times [2020-10-29 09:12:37,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:37,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599629777] [2020-10-29 09:12:37,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:37,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:37,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:38,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:38,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 09:12:38,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:38,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 871 [2020-10-29 09:12:38,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:38,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:38,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:12:38,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:38,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 09:12:38,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:38,953 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 27 [2020-10-29 09:12:38,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:38,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:38,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:38,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:38,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:38,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:38,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:12:38,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:38,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:38,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:38,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:38,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:38,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:39,007 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:39,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599629777] [2020-10-29 09:12:39,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:39,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:12:39,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934328296] [2020-10-29 09:12:39,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:12:39,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:39,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:12:39,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:12:39,008 INFO L87 Difference]: Start difference. First operand 330 states and 391 transitions. Second operand 11 states. [2020-10-29 09:12:40,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:40,323 INFO L93 Difference]: Finished difference Result 361 states and 427 transitions. [2020-10-29 09:12:40,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:12:40,323 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2020-10-29 09:12:40,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:40,326 INFO L225 Difference]: With dead ends: 361 [2020-10-29 09:12:40,326 INFO L226 Difference]: Without dead ends: 334 [2020-10-29 09:12:40,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:12:40,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-10-29 09:12:40,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 330. [2020-10-29 09:12:40,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-10-29 09:12:40,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 390 transitions. [2020-10-29 09:12:40,352 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 390 transitions. Word has length 46 [2020-10-29 09:12:40,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:40,353 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 390 transitions. [2020-10-29 09:12:40,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:12:40,353 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 390 transitions. [2020-10-29 09:12:40,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 09:12:40,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:40,354 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:40,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-29 09:12:40,354 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:40,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:40,355 INFO L82 PathProgramCache]: Analyzing trace with hash -937662642, now seen corresponding path program 8 times [2020-10-29 09:12:40,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:40,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424129641] [2020-10-29 09:12:40,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:40,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:40,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:42,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:42,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 09:12:42,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:42,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1826 [2020-10-29 09:12:42,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:42,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:42,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:12:42,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:42,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 09:12:42,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:42,631 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-10-29 09:12:43,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:43,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:43,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:43,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:43,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:43,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:43,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:43,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:43,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:43,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:43,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:43,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:43,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:43,045 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:43,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424129641] [2020-10-29 09:12:43,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:43,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:12:43,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489087708] [2020-10-29 09:12:43,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:12:43,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:43,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:12:43,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:12:43,046 INFO L87 Difference]: Start difference. First operand 330 states and 390 transitions. Second operand 15 states. [2020-10-29 09:12:44,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:44,626 INFO L93 Difference]: Finished difference Result 363 states and 433 transitions. [2020-10-29 09:12:44,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:12:44,626 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 46 [2020-10-29 09:12:44,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:44,629 INFO L225 Difference]: With dead ends: 363 [2020-10-29 09:12:44,629 INFO L226 Difference]: Without dead ends: 359 [2020-10-29 09:12:44,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:12:44,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-10-29 09:12:44,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 330. [2020-10-29 09:12:44,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-10-29 09:12:44,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 390 transitions. [2020-10-29 09:12:44,668 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 390 transitions. Word has length 46 [2020-10-29 09:12:44,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:44,668 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 390 transitions. [2020-10-29 09:12:44,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:12:44,669 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 390 transitions. [2020-10-29 09:12:44,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 09:12:44,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:44,670 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:44,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-29 09:12:44,670 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:44,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:44,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1888811860, now seen corresponding path program 2 times [2020-10-29 09:12:44,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:44,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671352087] [2020-10-29 09:12:44,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:44,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:44,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:44,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:46,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:46,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 09:12:46,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:12:46,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1809 [2020-10-29 09:12:46,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:46,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:46,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:12:46,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:46,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 09:12:46,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:47,008 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 43 [2020-10-29 09:12:47,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:47,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:47,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:47,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:47,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:47,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:47,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:47,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:47,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:47,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:47,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:47,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:47,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:47,164 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:47,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671352087] [2020-10-29 09:12:47,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:47,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:12:47,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131593181] [2020-10-29 09:12:47,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:12:47,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:47,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:12:47,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:12:47,166 INFO L87 Difference]: Start difference. First operand 330 states and 390 transitions. Second operand 14 states. [2020-10-29 09:12:47,461 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2020-10-29 09:12:48,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:48,396 INFO L93 Difference]: Finished difference Result 352 states and 415 transitions. [2020-10-29 09:12:48,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:12:48,397 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2020-10-29 09:12:48,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:48,399 INFO L225 Difference]: With dead ends: 352 [2020-10-29 09:12:48,399 INFO L226 Difference]: Without dead ends: 348 [2020-10-29 09:12:48,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:12:48,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-10-29 09:12:48,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 334. [2020-10-29 09:12:48,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-10-29 09:12:48,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 394 transitions. [2020-10-29 09:12:48,431 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 394 transitions. Word has length 47 [2020-10-29 09:12:48,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:48,431 INFO L481 AbstractCegarLoop]: Abstraction has 334 states and 394 transitions. [2020-10-29 09:12:48,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:12:48,431 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 394 transitions. [2020-10-29 09:12:48,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 09:12:48,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:48,433 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:48,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-29 09:12:48,433 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:48,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:48,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1680586438, now seen corresponding path program 1 times [2020-10-29 09:12:48,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:48,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1843466334] [2020-10-29 09:12:48,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:48,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:48,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:48,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:49,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:49,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 09:12:49,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:12:49,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1391 [2020-10-29 09:12:49,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:49,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:49,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:12:49,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:49,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 09:12:49,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:50,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:50,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:50,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:50,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:50,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:50,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:50,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:12:50,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:50,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:50,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:50,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:50,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:50,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:50,306 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:50,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1843466334] [2020-10-29 09:12:50,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:50,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:12:50,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601444289] [2020-10-29 09:12:50,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:12:50,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:50,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:12:50,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:12:50,308 INFO L87 Difference]: Start difference. First operand 334 states and 394 transitions. Second operand 14 states. [2020-10-29 09:12:51,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:51,838 INFO L93 Difference]: Finished difference Result 385 states and 454 transitions. [2020-10-29 09:12:51,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:12:51,839 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2020-10-29 09:12:51,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:51,841 INFO L225 Difference]: With dead ends: 385 [2020-10-29 09:12:51,841 INFO L226 Difference]: Without dead ends: 373 [2020-10-29 09:12:51,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:12:51,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-10-29 09:12:51,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 334. [2020-10-29 09:12:51,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-10-29 09:12:51,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 393 transitions. [2020-10-29 09:12:51,870 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 393 transitions. Word has length 47 [2020-10-29 09:12:51,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:51,871 INFO L481 AbstractCegarLoop]: Abstraction has 334 states and 393 transitions. [2020-10-29 09:12:51,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:12:51,871 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 393 transitions. [2020-10-29 09:12:51,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 09:12:51,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:51,872 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:51,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-29 09:12:51,872 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:51,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:51,873 INFO L82 PathProgramCache]: Analyzing trace with hash -523023083, now seen corresponding path program 1 times [2020-10-29 09:12:51,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:51,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726507155] [2020-10-29 09:12:51,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:51,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:52,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:52,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:52,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:56,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:56,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 09:12:56,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:12:56,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 09:12:56,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:56,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:56,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:12:56,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:12:56,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 09:12:56,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:57,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:12:57,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:57,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:12:57,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:12:57,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:12:57,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:12:57,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:12:57,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:12:57,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:12:57,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:12:57,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:12:57,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:12:57,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:12:57,236 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:12:57,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726507155] [2020-10-29 09:12:57,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:12:57,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:12:57,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761526264] [2020-10-29 09:12:57,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:12:57,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:12:57,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:12:57,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:12:57,238 INFO L87 Difference]: Start difference. First operand 334 states and 393 transitions. Second operand 12 states. [2020-10-29 09:12:58,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:12:58,452 INFO L93 Difference]: Finished difference Result 424 states and 498 transitions. [2020-10-29 09:12:58,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:12:58,452 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-29 09:12:58,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:12:58,455 INFO L225 Difference]: With dead ends: 424 [2020-10-29 09:12:58,455 INFO L226 Difference]: Without dead ends: 397 [2020-10-29 09:12:58,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:12:58,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-10-29 09:12:58,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 369. [2020-10-29 09:12:58,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2020-10-29 09:12:58,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 434 transitions. [2020-10-29 09:12:58,487 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 434 transitions. Word has length 47 [2020-10-29 09:12:58,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:12:58,487 INFO L481 AbstractCegarLoop]: Abstraction has 369 states and 434 transitions. [2020-10-29 09:12:58,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:12:58,487 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 434 transitions. [2020-10-29 09:12:58,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 09:12:58,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:12:58,488 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1] [2020-10-29 09:12:58,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-29 09:12:58,489 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:12:58,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:12:58,489 INFO L82 PathProgramCache]: Analyzing trace with hash -916050093, now seen corresponding path program 1 times [2020-10-29 09:12:58,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:12:58,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853548447] [2020-10-29 09:12:58,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:12:58,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:12:58,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:00,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:00,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 09:13:00,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:00,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1574 [2020-10-29 09:13:00,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:00,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:00,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:13:00,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:00,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 09:13:00,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:00,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:00,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:00,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:00,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:00,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:00,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:00,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:00,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:00,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:00,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:00,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:00,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:00,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:00,875 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:00,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853548447] [2020-10-29 09:13:00,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:00,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:13:00,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949444932] [2020-10-29 09:13:00,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:13:00,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:00,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:13:00,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:13:00,876 INFO L87 Difference]: Start difference. First operand 369 states and 434 transitions. Second operand 15 states. [2020-10-29 09:13:03,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:03,718 INFO L93 Difference]: Finished difference Result 440 states and 520 transitions. [2020-10-29 09:13:03,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:13:03,719 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2020-10-29 09:13:03,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:03,722 INFO L225 Difference]: With dead ends: 440 [2020-10-29 09:13:03,722 INFO L226 Difference]: Without dead ends: 436 [2020-10-29 09:13:03,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:13:03,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-10-29 09:13:03,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 373. [2020-10-29 09:13:03,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373 states. [2020-10-29 09:13:03,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 439 transitions. [2020-10-29 09:13:03,770 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 439 transitions. Word has length 47 [2020-10-29 09:13:03,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:03,770 INFO L481 AbstractCegarLoop]: Abstraction has 373 states and 439 transitions. [2020-10-29 09:13:03,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:13:03,770 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 439 transitions. [2020-10-29 09:13:03,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 09:13:03,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:03,771 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:03,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-29 09:13:03,772 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:03,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:03,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1711039884, now seen corresponding path program 1 times [2020-10-29 09:13:03,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:03,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614702436] [2020-10-29 09:13:03,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:03,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:03,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:04,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:04,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 09:13:04,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:04,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 865 [2020-10-29 09:13:04,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:04,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:04,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:13:04,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:04,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 09:13:04,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:05,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:05,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:05,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:05,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:05,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:05,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:05,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:05,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:05,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:05,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:05,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:05,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:05,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:05,093 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:05,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614702436] [2020-10-29 09:13:05,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:05,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:13:05,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467004541] [2020-10-29 09:13:05,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:13:05,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:05,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:13:05,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:13:05,094 INFO L87 Difference]: Start difference. First operand 373 states and 439 transitions. Second operand 13 states. [2020-10-29 09:13:07,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:07,276 INFO L93 Difference]: Finished difference Result 436 states and 512 transitions. [2020-10-29 09:13:07,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 09:13:07,276 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2020-10-29 09:13:07,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:07,278 INFO L225 Difference]: With dead ends: 436 [2020-10-29 09:13:07,278 INFO L226 Difference]: Without dead ends: 399 [2020-10-29 09:13:07,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2020-10-29 09:13:07,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2020-10-29 09:13:07,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 378. [2020-10-29 09:13:07,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 378 states. [2020-10-29 09:13:07,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 444 transitions. [2020-10-29 09:13:07,323 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 444 transitions. Word has length 47 [2020-10-29 09:13:07,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:07,323 INFO L481 AbstractCegarLoop]: Abstraction has 378 states and 444 transitions. [2020-10-29 09:13:07,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:13:07,323 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 444 transitions. [2020-10-29 09:13:07,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:13:07,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:07,324 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:07,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-29 09:13:07,324 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:07,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:07,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1210993914, now seen corresponding path program 1 times [2020-10-29 09:13:07,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:07,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746127934] [2020-10-29 09:13:07,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:07,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:07,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:07,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:07,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 09:13:07,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:07,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 368 [2020-10-29 09:13:07,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:07,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:07,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:13:07,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:07,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 09:13:07,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:08,206 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2020-10-29 09:13:08,389 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2020-10-29 09:13:08,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:08,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:08,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:08,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:08,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:08,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:08,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:08,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:08,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:08,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:08,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:08,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:08,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:08,593 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:08,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746127934] [2020-10-29 09:13:08,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:08,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:13:08,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740284728] [2020-10-29 09:13:08,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:13:08,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:08,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:13:08,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:13:08,594 INFO L87 Difference]: Start difference. First operand 378 states and 444 transitions. Second operand 13 states. [2020-10-29 09:13:09,129 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-10-29 09:13:09,549 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2020-10-29 09:13:09,883 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-29 09:13:10,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:10,043 INFO L93 Difference]: Finished difference Result 436 states and 513 transitions. [2020-10-29 09:13:10,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:13:10,044 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 48 [2020-10-29 09:13:10,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:10,045 INFO L225 Difference]: With dead ends: 436 [2020-10-29 09:13:10,045 INFO L226 Difference]: Without dead ends: 412 [2020-10-29 09:13:10,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:13:10,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2020-10-29 09:13:10,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 390. [2020-10-29 09:13:10,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2020-10-29 09:13:10,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 457 transitions. [2020-10-29 09:13:10,089 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 457 transitions. Word has length 48 [2020-10-29 09:13:10,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:10,090 INFO L481 AbstractCegarLoop]: Abstraction has 390 states and 457 transitions. [2020-10-29 09:13:10,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:13:10,090 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 457 transitions. [2020-10-29 09:13:10,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:13:10,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:10,091 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:10,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-29 09:13:10,091 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:10,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:10,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1859442493, now seen corresponding path program 1 times [2020-10-29 09:13:10,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:10,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54403813] [2020-10-29 09:13:10,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:10,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:10,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:10,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:11,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:11,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 09:13:11,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:13:11,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1654 [2020-10-29 09:13:11,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:11,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:11,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:13:11,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:11,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 09:13:11,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:12,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:12,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:12,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:12,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:12,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:12,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:12,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:12,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:12,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:12,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:12,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:12,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:12,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:12,360 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:12,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54403813] [2020-10-29 09:13:12,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:12,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:13:12,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210214443] [2020-10-29 09:13:12,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:13:12,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:12,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:13:12,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:13:12,361 INFO L87 Difference]: Start difference. First operand 390 states and 457 transitions. Second operand 14 states. [2020-10-29 09:13:14,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:14,200 INFO L93 Difference]: Finished difference Result 429 states and 503 transitions. [2020-10-29 09:13:14,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 09:13:14,201 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-10-29 09:13:14,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:14,203 INFO L225 Difference]: With dead ends: 429 [2020-10-29 09:13:14,203 INFO L226 Difference]: Without dead ends: 425 [2020-10-29 09:13:14,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:13:14,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2020-10-29 09:13:14,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 386. [2020-10-29 09:13:14,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2020-10-29 09:13:14,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 453 transitions. [2020-10-29 09:13:14,255 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 453 transitions. Word has length 48 [2020-10-29 09:13:14,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:14,256 INFO L481 AbstractCegarLoop]: Abstraction has 386 states and 453 transitions. [2020-10-29 09:13:14,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:13:14,256 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 453 transitions. [2020-10-29 09:13:14,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:13:14,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:14,258 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:14,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-29 09:13:14,258 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:14,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:14,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1192020961, now seen corresponding path program 1 times [2020-10-29 09:13:14,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:14,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203132986] [2020-10-29 09:13:14,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:14,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:14,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:14,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:18,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:18,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 09:13:18,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:13:18,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3821 [2020-10-29 09:13:18,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:18,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:18,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:13:18,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:18,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 09:13:18,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:18,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:18,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:18,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:18,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:18,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:18,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:18,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:18,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:18,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:18,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:18,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:18,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:18,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:18,981 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:18,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203132986] [2020-10-29 09:13:18,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:18,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:13:18,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900943683] [2020-10-29 09:13:18,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:13:18,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:18,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:13:18,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:13:18,982 INFO L87 Difference]: Start difference. First operand 386 states and 453 transitions. Second operand 15 states. [2020-10-29 09:13:21,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:21,475 INFO L93 Difference]: Finished difference Result 440 states and 517 transitions. [2020-10-29 09:13:21,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:13:21,476 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 48 [2020-10-29 09:13:21,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:21,479 INFO L225 Difference]: With dead ends: 440 [2020-10-29 09:13:21,479 INFO L226 Difference]: Without dead ends: 428 [2020-10-29 09:13:21,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:13:21,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2020-10-29 09:13:21,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 386. [2020-10-29 09:13:21,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2020-10-29 09:13:21,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 452 transitions. [2020-10-29 09:13:21,515 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 452 transitions. Word has length 48 [2020-10-29 09:13:21,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:21,515 INFO L481 AbstractCegarLoop]: Abstraction has 386 states and 452 transitions. [2020-10-29 09:13:21,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:13:21,515 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 452 transitions. [2020-10-29 09:13:21,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:13:21,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:21,516 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:21,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-29 09:13:21,516 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:21,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:21,517 INFO L82 PathProgramCache]: Analyzing trace with hash 637450723, now seen corresponding path program 9 times [2020-10-29 09:13:21,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:21,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077213761] [2020-10-29 09:13:21,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:21,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:21,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:22,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:24,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:24,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 09:13:24,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:13:24,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2691 [2020-10-29 09:13:24,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:24,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:24,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:13:24,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:24,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 09:13:24,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:24,699 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-10-29 09:13:24,852 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-10-29 09:13:25,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:25,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:25,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:25,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:25,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:25,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:25,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:13:25,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:25,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:25,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:25,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:25,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:25,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:25,139 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:25,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077213761] [2020-10-29 09:13:25,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:25,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:13:25,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787109573] [2020-10-29 09:13:25,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:13:25,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:25,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:13:25,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:13:25,141 INFO L87 Difference]: Start difference. First operand 386 states and 452 transitions. Second operand 14 states. [2020-10-29 09:13:26,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:26,730 INFO L93 Difference]: Finished difference Result 459 states and 539 transitions. [2020-10-29 09:13:26,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:13:26,736 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-10-29 09:13:26,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:26,738 INFO L225 Difference]: With dead ends: 459 [2020-10-29 09:13:26,738 INFO L226 Difference]: Without dead ends: 418 [2020-10-29 09:13:26,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:13:26,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-10-29 09:13:26,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 386. [2020-10-29 09:13:26,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2020-10-29 09:13:26,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 451 transitions. [2020-10-29 09:13:26,775 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 451 transitions. Word has length 48 [2020-10-29 09:13:26,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:26,775 INFO L481 AbstractCegarLoop]: Abstraction has 386 states and 451 transitions. [2020-10-29 09:13:26,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:13:26,775 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 451 transitions. [2020-10-29 09:13:26,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:13:26,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:26,777 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:26,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-29 09:13:26,777 INFO L429 AbstractCegarLoop]: === Iteration 64 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:26,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:26,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1613810211, now seen corresponding path program 10 times [2020-10-29 09:13:26,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:26,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878712862] [2020-10-29 09:13:26,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:26,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:26,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:28,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:28,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 09:13:28,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:28,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1202 [2020-10-29 09:13:28,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:28,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:28,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:13:28,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:28,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 09:13:28,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:28,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:28,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:28,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:28,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:28,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:28,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:28,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:13:28,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:28,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:28,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:28,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:28,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:28,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:28,703 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:28,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878712862] [2020-10-29 09:13:28,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:28,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:13:28,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477584134] [2020-10-29 09:13:28,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:13:28,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:28,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:13:28,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:13:28,705 INFO L87 Difference]: Start difference. First operand 386 states and 451 transitions. Second operand 15 states. [2020-10-29 09:13:31,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:31,480 INFO L93 Difference]: Finished difference Result 443 states and 522 transitions. [2020-10-29 09:13:31,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 09:13:31,481 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 48 [2020-10-29 09:13:31,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:31,484 INFO L225 Difference]: With dead ends: 443 [2020-10-29 09:13:31,484 INFO L226 Difference]: Without dead ends: 439 [2020-10-29 09:13:31,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:13:31,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2020-10-29 09:13:31,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 396. [2020-10-29 09:13:31,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2020-10-29 09:13:31,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 465 transitions. [2020-10-29 09:13:31,524 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 465 transitions. Word has length 48 [2020-10-29 09:13:31,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:31,525 INFO L481 AbstractCegarLoop]: Abstraction has 396 states and 465 transitions. [2020-10-29 09:13:31,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:13:31,525 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 465 transitions. [2020-10-29 09:13:31,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 09:13:31,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:31,526 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:31,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-29 09:13:31,526 INFO L429 AbstractCegarLoop]: === Iteration 65 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:31,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:31,527 INFO L82 PathProgramCache]: Analyzing trace with hash 638697102, now seen corresponding path program 1 times [2020-10-29 09:13:31,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:31,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350227999] [2020-10-29 09:13:31,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:31,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:31,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:31,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:32,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:32,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 09:13:32,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:13:32,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 832 [2020-10-29 09:13:32,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:32,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:32,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:13:32,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:32,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 09:13:32,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:33,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:33,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:33,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:33,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:33,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:33,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:33,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:13:33,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:33,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:33,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:33,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:33,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:33,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:33,037 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:33,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350227999] [2020-10-29 09:13:33,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:33,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:13:33,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313946553] [2020-10-29 09:13:33,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:13:33,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:33,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:13:33,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:13:33,039 INFO L87 Difference]: Start difference. First operand 396 states and 465 transitions. Second operand 13 states. [2020-10-29 09:13:33,887 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-10-29 09:13:34,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:34,410 INFO L93 Difference]: Finished difference Result 418 states and 490 transitions. [2020-10-29 09:13:34,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:13:34,416 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-10-29 09:13:34,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:34,418 INFO L225 Difference]: With dead ends: 418 [2020-10-29 09:13:34,418 INFO L226 Difference]: Without dead ends: 414 [2020-10-29 09:13:34,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:13:34,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2020-10-29 09:13:34,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 384. [2020-10-29 09:13:34,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-10-29 09:13:34,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 452 transitions. [2020-10-29 09:13:34,468 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 452 transitions. Word has length 49 [2020-10-29 09:13:34,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:34,468 INFO L481 AbstractCegarLoop]: Abstraction has 384 states and 452 transitions. [2020-10-29 09:13:34,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:13:34,468 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 452 transitions. [2020-10-29 09:13:34,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 09:13:34,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:34,469 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:34,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-29 09:13:34,469 INFO L429 AbstractCegarLoop]: === Iteration 66 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:34,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:34,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1550159415, now seen corresponding path program 2 times [2020-10-29 09:13:34,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:34,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511615433] [2020-10-29 09:13:34,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:34,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:34,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:34,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:34,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:37,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:37,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 09:13:37,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:13:37,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2836 [2020-10-29 09:13:37,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:37,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:37,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:13:37,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:37,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 09:13:37,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:37,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:37,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:37,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:37,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:37,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:37,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:37,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:37,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:37,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:37,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:37,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:37,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:37,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:13:37,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511615433] [2020-10-29 09:13:37,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:37,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:13:37,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491610352] [2020-10-29 09:13:37,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:13:37,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:37,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:13:37,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:13:37,699 INFO L87 Difference]: Start difference. First operand 384 states and 452 transitions. Second operand 13 states. [2020-10-29 09:13:38,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:38,931 INFO L93 Difference]: Finished difference Result 423 states and 494 transitions. [2020-10-29 09:13:38,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 09:13:38,932 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-10-29 09:13:38,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:38,935 INFO L225 Difference]: With dead ends: 423 [2020-10-29 09:13:38,935 INFO L226 Difference]: Without dead ends: 419 [2020-10-29 09:13:38,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:13:38,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2020-10-29 09:13:38,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 384. [2020-10-29 09:13:38,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-10-29 09:13:38,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 452 transitions. [2020-10-29 09:13:38,988 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 452 transitions. Word has length 49 [2020-10-29 09:13:38,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:38,988 INFO L481 AbstractCegarLoop]: Abstraction has 384 states and 452 transitions. [2020-10-29 09:13:38,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:13:38,988 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 452 transitions. [2020-10-29 09:13:38,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 09:13:38,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:38,989 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:38,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-29 09:13:38,989 INFO L429 AbstractCegarLoop]: === Iteration 67 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:38,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:38,990 INFO L82 PathProgramCache]: Analyzing trace with hash 656520253, now seen corresponding path program 1 times [2020-10-29 09:13:38,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:38,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733601146] [2020-10-29 09:13:38,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:39,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:39,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:39,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:39,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:39,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:40,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:43,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:43,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:44,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:44,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 09:13:44,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:13:44,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-29 09:13:44,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:44,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:44,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:13:44,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:13:44,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 09:13:44,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:44,666 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 52 [2020-10-29 09:13:44,995 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 51 [2020-10-29 09:13:45,170 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 44 [2020-10-29 09:13:45,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:13:45,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:45,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:13:45,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:13:45,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:13:45,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:13:45,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:13:45,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:13:45,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:13:45,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:13:45,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:13:45,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:13:45,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:13:45,364 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 09:13:45,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733601146] [2020-10-29 09:13:45,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:13:45,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:13:45,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954145724] [2020-10-29 09:13:45,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:13:45,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:13:45,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:13:45,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:13:45,365 INFO L87 Difference]: Start difference. First operand 384 states and 452 transitions. Second operand 15 states. [2020-10-29 09:13:46,315 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 31 [2020-10-29 09:13:46,614 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2020-10-29 09:13:46,765 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2020-10-29 09:13:47,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:13:47,656 INFO L93 Difference]: Finished difference Result 466 states and 548 transitions. [2020-10-29 09:13:47,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:13:47,657 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2020-10-29 09:13:47,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:13:47,660 INFO L225 Difference]: With dead ends: 466 [2020-10-29 09:13:47,660 INFO L226 Difference]: Without dead ends: 462 [2020-10-29 09:13:47,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:13:47,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2020-10-29 09:13:47,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 403. [2020-10-29 09:13:47,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-10-29 09:13:47,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 476 transitions. [2020-10-29 09:13:47,716 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 476 transitions. Word has length 49 [2020-10-29 09:13:47,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:13:47,716 INFO L481 AbstractCegarLoop]: Abstraction has 403 states and 476 transitions. [2020-10-29 09:13:47,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:13:47,716 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 476 transitions. [2020-10-29 09:13:47,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 09:13:47,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:13:47,718 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:13:47,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-29 09:13:47,718 INFO L429 AbstractCegarLoop]: === Iteration 68 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:13:47,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:13:47,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1032423489, now seen corresponding path program 1 times [2020-10-29 09:13:47,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:13:47,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465442228] [2020-10-29 09:13:47,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:13:47,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:13:47,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking...