/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/forester-heap/dll-sorted-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:46:08,156 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:46:08,160 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:46:08,201 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:46:08,202 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:46:08,204 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:46:08,205 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:46:08,208 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:46:08,210 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:46:08,212 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:46:08,213 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:46:08,215 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:46:08,215 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:46:08,217 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:46:08,218 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:46:08,220 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:46:08,221 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:46:08,222 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:46:08,225 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:46:08,227 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:46:08,229 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:46:08,231 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:46:08,233 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:46:08,234 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:46:08,251 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:46:08,251 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:46:08,252 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:46:08,253 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:46:08,254 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:46:08,255 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:46:08,255 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:46:08,256 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:46:08,257 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:46:08,259 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:46:08,260 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:46:08,260 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:46:08,261 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:46:08,262 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:46:08,262 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:46:08,263 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:46:08,264 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:46:08,265 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 19:46:08,295 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:46:08,295 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:46:08,297 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:46:08,297 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:46:08,297 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:46:08,298 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:46:08,298 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:46:08,298 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:46:08,298 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:46:08,299 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:46:08,299 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:46:08,299 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:46:08,299 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:46:08,299 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:46:08,300 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:46:08,300 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:46:08,300 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:46:08,300 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:46:08,301 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:46:08,301 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:46:08,301 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:46:08,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:46:08,302 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:46:08,302 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:46:08,302 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:46:08,302 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:46:08,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:46:08,303 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:46:08,303 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:46:08,303 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:46:08,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:46:08,761 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:46:08,764 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:46:08,765 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:46:08,765 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:46:08,766 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-sorted-2.i [2020-10-27 19:46:08,856 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0cfdc8dc1/55ae971f3dea4661937b73f4e8ded51d/FLAG8ce77018b [2020-10-27 19:46:09,600 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:46:09,601 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-sorted-2.i [2020-10-27 19:46:09,623 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0cfdc8dc1/55ae971f3dea4661937b73f4e8ded51d/FLAG8ce77018b [2020-10-27 19:46:09,818 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0cfdc8dc1/55ae971f3dea4661937b73f4e8ded51d [2020-10-27 19:46:09,821 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:46:09,829 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:46:09,831 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:46:09,831 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:46:09,835 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:46:09,836 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:46:09" (1/1) ... [2020-10-27 19:46:09,840 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55fcf37a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:09, skipping insertion in model container [2020-10-27 19:46:09,841 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:46:09" (1/1) ... [2020-10-27 19:46:09,849 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:46:09,890 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:46:10,285 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:46:10,296 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:46:10,348 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:46:10,412 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:46:10,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:10 WrapperNode [2020-10-27 19:46:10,413 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:46:10,414 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:46:10,415 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:46:10,415 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:46:10,428 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:10" (1/1) ... [2020-10-27 19:46:10,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:10" (1/1) ... [2020-10-27 19:46:10,446 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:10" (1/1) ... [2020-10-27 19:46:10,446 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:10" (1/1) ... [2020-10-27 19:46:10,494 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:10" (1/1) ... [2020-10-27 19:46:10,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:10" (1/1) ... [2020-10-27 19:46:10,545 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:10" (1/1) ... [2020-10-27 19:46:10,559 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:46:10,560 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:46:10,560 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:46:10,562 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:46:10,563 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:10" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:46:10,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:46:10,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:46:10,672 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:46:10,673 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:46:10,673 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 19:46:10,674 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 19:46:10,674 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 19:46:10,674 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 19:46:10,675 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 19:46:10,675 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 19:46:10,676 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 19:46:10,676 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 19:46:10,676 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 19:46:10,676 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 19:46:10,677 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 19:46:10,678 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 19:46:10,678 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 19:46:10,678 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 19:46:10,678 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 19:46:10,678 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 19:46:10,679 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 19:46:10,679 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 19:46:10,679 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 19:46:10,679 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 19:46:10,679 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 19:46:10,679 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 19:46:10,680 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 19:46:10,680 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 19:46:10,680 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 19:46:10,680 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 19:46:10,680 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 19:46:10,680 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 19:46:10,680 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 19:46:10,681 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 19:46:10,681 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 19:46:10,681 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 19:46:10,681 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 19:46:10,681 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 19:46:10,681 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 19:46:10,682 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 19:46:10,682 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 19:46:10,682 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 19:46:10,682 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 19:46:10,682 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 19:46:10,682 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 19:46:10,682 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 19:46:10,683 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 19:46:10,683 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 19:46:10,683 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 19:46:10,683 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 19:46:10,683 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 19:46:10,683 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 19:46:10,684 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 19:46:10,685 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 19:46:10,685 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 19:46:10,686 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 19:46:10,687 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 19:46:10,687 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 19:46:10,687 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 19:46:10,687 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 19:46:10,688 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 19:46:10,688 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 19:46:10,688 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 19:46:10,688 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:46:10,688 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 19:46:10,688 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 19:46:10,688 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 19:46:10,688 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 19:46:10,689 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 19:46:10,689 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 19:46:10,689 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 19:46:10,690 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 19:46:10,692 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 19:46:10,692 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 19:46:10,692 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 19:46:10,693 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 19:46:10,693 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 19:46:10,693 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 19:46:10,693 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 19:46:10,693 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 19:46:10,693 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 19:46:10,694 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 19:46:10,694 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 19:46:10,694 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 19:46:10,694 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 19:46:10,694 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 19:46:10,694 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 19:46:10,695 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 19:46:10,696 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 19:46:10,696 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 19:46:10,696 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 19:46:10,696 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 19:46:10,696 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 19:46:10,697 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 19:46:10,697 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 19:46:10,697 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 19:46:10,697 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 19:46:10,697 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 19:46:10,697 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 19:46:10,697 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 19:46:10,698 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 19:46:10,698 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 19:46:10,698 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 19:46:10,698 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 19:46:10,698 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 19:46:10,698 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 19:46:10,698 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 19:46:10,698 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 19:46:10,698 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:46:10,699 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 19:46:10,699 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 19:46:10,699 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:46:10,699 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:46:10,699 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:46:10,699 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 19:46:10,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 19:46:10,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:46:10,701 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 19:46:10,701 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:46:10,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:46:10,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:46:10,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:46:10,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:46:11,715 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:46:11,716 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-10-27 19:46:11,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:46:11 BoogieIcfgContainer [2020-10-27 19:46:11,718 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:46:11,720 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:46:11,720 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:46:11,724 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:46:11,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:46:09" (1/3) ... [2020-10-27 19:46:11,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73e93ec5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:46:11, skipping insertion in model container [2020-10-27 19:46:11,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:10" (2/3) ... [2020-10-27 19:46:11,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73e93ec5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:46:11, skipping insertion in model container [2020-10-27 19:46:11,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:46:11" (3/3) ... [2020-10-27 19:46:11,728 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-sorted-2.i [2020-10-27 19:46:11,742 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:46:11,748 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:46:11,763 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:46:11,792 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:46:11,792 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:46:11,792 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:46:11,792 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:46:11,793 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:46:11,793 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:46:11,793 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:46:11,793 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:46:11,813 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2020-10-27 19:46:11,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 19:46:11,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:11,821 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:11,821 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:11,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:11,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1889217750, now seen corresponding path program 1 times [2020-10-27 19:46:11,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:11,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138085510] [2020-10-27 19:46:11,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:11,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:12,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:12,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:12,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:12,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 19:46:12,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:12,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 365 [2020-10-27 19:46:12,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:12,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:12,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 19:46:12,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:12,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 19:46:12,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:12,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:12,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:12,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:12,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:12,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:12,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 19:46:12,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:12,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:12,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:12,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:12,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:12,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:12,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138085510] [2020-10-27 19:46:12,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:12,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 19:46:12,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201158066] [2020-10-27 19:46:12,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 19:46:12,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:12,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 19:46:12,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 19:46:12,540 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 3 states. [2020-10-27 19:46:12,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:12,737 INFO L93 Difference]: Finished difference Result 114 states and 193 transitions. [2020-10-27 19:46:12,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 19:46:12,738 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-27 19:46:12,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:12,748 INFO L225 Difference]: With dead ends: 114 [2020-10-27 19:46:12,748 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 19:46:12,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 19:46:12,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 19:46:12,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-27 19:46:12,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 19:46:12,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2020-10-27 19:46:12,796 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 12 [2020-10-27 19:46:12,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:12,797 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2020-10-27 19:46:12,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 19:46:12,797 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2020-10-27 19:46:12,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 19:46:12,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:12,798 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:12,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:46:12,799 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:12,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:12,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1773087040, now seen corresponding path program 1 times [2020-10-27 19:46:12,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:12,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681687473] [2020-10-27 19:46:12,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:12,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:12,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:12,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:13,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:13,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 19:46:13,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:13,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-10-27 19:46:13,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:13,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:46:13,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:13,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 19:46:13,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:13,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:13,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:13,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:13,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:13,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:13,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:13,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 19:46:13,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:13,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:13,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:13,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:13,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:13,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:13,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681687473] [2020-10-27 19:46:13,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:13,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:46:13,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609843869] [2020-10-27 19:46:13,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:46:13,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:13,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:46:13,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:13,112 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand 4 states. [2020-10-27 19:46:13,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:13,293 INFO L93 Difference]: Finished difference Result 101 states and 134 transitions. [2020-10-27 19:46:13,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:46:13,294 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-27 19:46:13,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:13,295 INFO L225 Difference]: With dead ends: 101 [2020-10-27 19:46:13,295 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 19:46:13,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:13,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 19:46:13,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-27 19:46:13,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 19:46:13,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2020-10-27 19:46:13,308 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 13 [2020-10-27 19:46:13,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:13,308 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2020-10-27 19:46:13,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:46:13,308 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2020-10-27 19:46:13,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 19:46:13,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:13,309 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:13,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:46:13,310 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:13,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:13,310 INFO L82 PathProgramCache]: Analyzing trace with hash 243114517, now seen corresponding path program 1 times [2020-10-27 19:46:13,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:13,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888343903] [2020-10-27 19:46:13,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:13,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:13,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:13,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:13,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 19:46:13,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:13,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-27 19:46:13,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:13,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 19:46:13,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:13,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 19:46:13,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:13,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:13,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:13,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:13,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:13,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:13,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:13,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:46:13,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:13,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:13,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:13,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:13,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:13,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 19:46:13,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888343903] [2020-10-27 19:46:13,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:13,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 19:46:13,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860381007] [2020-10-27 19:46:13,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:46:13,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:13,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:46:13,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:46:13,577 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand 5 states. [2020-10-27 19:46:13,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:13,809 INFO L93 Difference]: Finished difference Result 87 states and 113 transitions. [2020-10-27 19:46:13,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:46:13,809 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-27 19:46:13,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:13,811 INFO L225 Difference]: With dead ends: 87 [2020-10-27 19:46:13,811 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 19:46:13,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:46:13,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 19:46:13,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-10-27 19:46:13,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 19:46:13,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2020-10-27 19:46:13,823 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 17 [2020-10-27 19:46:13,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:13,824 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2020-10-27 19:46:13,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:46:13,824 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2020-10-27 19:46:13,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 19:46:13,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:13,825 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] [2020-10-27 19:46:13,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:46:13,826 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:13,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:13,826 INFO L82 PathProgramCache]: Analyzing trace with hash -911494601, now seen corresponding path program 1 times [2020-10-27 19:46:13,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:13,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045346170] [2020-10-27 19:46:13,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:13,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:13,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:14,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:14,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 19:46:14,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:14,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 447 [2020-10-27 19:46:14,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:14,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:46:14,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:14,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 19:46:14,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:14,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:14,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:14,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:14,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:14,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:14,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:14,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:14,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:14,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:14,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:14,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:14,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:14,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:14,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045346170] [2020-10-27 19:46:14,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:14,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 19:46:14,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215494619] [2020-10-27 19:46:14,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 19:46:14,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:14,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 19:46:14,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:46:14,567 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand 9 states. [2020-10-27 19:46:15,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:15,398 INFO L93 Difference]: Finished difference Result 101 states and 133 transitions. [2020-10-27 19:46:15,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:46:15,399 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-27 19:46:15,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:15,401 INFO L225 Difference]: With dead ends: 101 [2020-10-27 19:46:15,402 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 19:46:15,403 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 [2020-10-27 19:46:15,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 19:46:15,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 72. [2020-10-27 19:46:15,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 19:46:15,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 94 transitions. [2020-10-27 19:46:15,416 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 94 transitions. Word has length 27 [2020-10-27 19:46:15,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:15,416 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 94 transitions. [2020-10-27 19:46:15,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 19:46:15,416 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 94 transitions. [2020-10-27 19:46:15,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 19:46:15,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:15,418 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] [2020-10-27 19:46:15,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 19:46:15,418 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:15,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:15,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1161269986, now seen corresponding path program 1 times [2020-10-27 19:46:15,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:15,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710858062] [2020-10-27 19:46:15,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:15,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:15,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:15,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:15,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:16,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:16,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 19:46:16,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:46:16,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1411 [2020-10-27 19:46:16,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:16,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:46:16,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:16,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 19:46:16,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:46:17,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:17,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:17,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:17,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:17,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:17,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:17,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:17,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:17,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:17,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:17,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:17,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:17,161 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:17,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710858062] [2020-10-27 19:46:17,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:17,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 19:46:17,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434920956] [2020-10-27 19:46:17,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 19:46:17,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:17,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 19:46:17,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:46:17,175 INFO L87 Difference]: Start difference. First operand 72 states and 94 transitions. Second operand 9 states. [2020-10-27 19:46:17,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:17,801 INFO L93 Difference]: Finished difference Result 133 states and 176 transitions. [2020-10-27 19:46:17,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:46:17,802 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-10-27 19:46:17,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:17,805 INFO L225 Difference]: With dead ends: 133 [2020-10-27 19:46:17,805 INFO L226 Difference]: Without dead ends: 98 [2020-10-27 19:46:17,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:46:17,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-27 19:46:17,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 79. [2020-10-27 19:46:17,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-27 19:46:17,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 103 transitions. [2020-10-27 19:46:17,836 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 103 transitions. Word has length 30 [2020-10-27 19:46:17,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:17,837 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 103 transitions. [2020-10-27 19:46:17,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 19:46:17,837 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 103 transitions. [2020-10-27 19:46:17,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 19:46:17,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:17,841 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] [2020-10-27 19:46:17,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 19:46:17,842 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:17,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:17,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1694431754, now seen corresponding path program 1 times [2020-10-27 19:46:17,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:17,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498747548] [2020-10-27 19:46:17,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:17,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:17,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:17,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:18,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:18,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 19:46:18,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:18,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 846 [2020-10-27 19:46:18,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:18,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:46:18,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 19:46:18,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:46:18,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:18,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:18,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:18,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:18,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:18,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:18,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:18,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:18,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:18,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:18,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:18,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:18,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:18,774 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 19:46:18,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498747548] [2020-10-27 19:46:18,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:18,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:46:18,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349615392] [2020-10-27 19:46:18,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:46:18,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:18,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:46:18,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:18,778 INFO L87 Difference]: Start difference. First operand 79 states and 103 transitions. Second operand 4 states. [2020-10-27 19:46:18,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:18,916 INFO L93 Difference]: Finished difference Result 129 states and 168 transitions. [2020-10-27 19:46:18,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:46:18,917 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-27 19:46:18,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:18,918 INFO L225 Difference]: With dead ends: 129 [2020-10-27 19:46:18,918 INFO L226 Difference]: Without dead ends: 80 [2020-10-27 19:46:18,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:18,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-27 19:46:18,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-27 19:46:18,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-27 19:46:18,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 101 transitions. [2020-10-27 19:46:18,935 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 101 transitions. Word has length 31 [2020-10-27 19:46:18,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:18,935 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 101 transitions. [2020-10-27 19:46:18,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:46:18,935 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 101 transitions. [2020-10-27 19:46:18,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 19:46:18,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:18,937 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] [2020-10-27 19:46:18,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 19:46:18,937 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:18,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:18,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1475577036, now seen corresponding path program 2 times [2020-10-27 19:46:18,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:18,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983150319] [2020-10-27 19:46:18,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:18,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:19,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:19,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:19,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 19:46:19,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:19,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 620 [2020-10-27 19:46:19,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:19,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:46:19,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:19,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 19:46:19,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:19,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:19,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:19,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:19,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:19,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:19,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:19,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:19,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:19,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:19,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:19,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:19,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:19,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:19,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983150319] [2020-10-27 19:46:19,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:19,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:46:19,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73728415] [2020-10-27 19:46:19,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:46:19,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:19,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:46:19,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:46:19,829 INFO L87 Difference]: Start difference. First operand 79 states and 101 transitions. Second operand 11 states. [2020-10-27 19:46:20,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:20,636 INFO L93 Difference]: Finished difference Result 149 states and 193 transitions. [2020-10-27 19:46:20,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 19:46:20,636 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 19:46:20,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:20,638 INFO L225 Difference]: With dead ends: 149 [2020-10-27 19:46:20,638 INFO L226 Difference]: Without dead ends: 145 [2020-10-27 19:46:20,639 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 [2020-10-27 19:46:20,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-27 19:46:20,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 95. [2020-10-27 19:46:20,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 19:46:20,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 123 transitions. [2020-10-27 19:46:20,665 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 123 transitions. Word has length 31 [2020-10-27 19:46:20,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:20,665 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 123 transitions. [2020-10-27 19:46:20,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:46:20,666 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 123 transitions. [2020-10-27 19:46:20,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 19:46:20,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:20,672 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:20,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 19:46:20,674 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:20,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:20,675 INFO L82 PathProgramCache]: Analyzing trace with hash -111006580, now seen corresponding path program 1 times [2020-10-27 19:46:20,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:20,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653221935] [2020-10-27 19:46:20,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:20,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:20,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:21,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:21,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 19:46:21,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:21,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 605 [2020-10-27 19:46:21,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:21,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:46:21,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:21,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 19:46:21,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:46:21,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:21,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:21,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:21,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:21,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:21,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:21,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:46:21,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:21,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:21,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:21,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:21,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:46:21,616 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:21,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653221935] [2020-10-27 19:46:21,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:21,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:46:21,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290943202] [2020-10-27 19:46:21,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:46:21,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:21,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:46:21,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:46:21,621 INFO L87 Difference]: Start difference. First operand 95 states and 123 transitions. Second operand 10 states. [2020-10-27 19:46:22,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:22,644 INFO L93 Difference]: Finished difference Result 188 states and 244 transitions. [2020-10-27 19:46:22,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 19:46:22,644 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-27 19:46:22,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:22,646 INFO L225 Difference]: With dead ends: 188 [2020-10-27 19:46:22,646 INFO L226 Difference]: Without dead ends: 154 [2020-10-27 19:46:22,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:46:22,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-27 19:46:22,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 109. [2020-10-27 19:46:22,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-27 19:46:22,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 140 transitions. [2020-10-27 19:46:22,669 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 140 transitions. Word has length 31 [2020-10-27 19:46:22,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:22,670 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 140 transitions. [2020-10-27 19:46:22,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:46:22,670 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 140 transitions. [2020-10-27 19:46:22,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 19:46:22,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:22,679 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:22,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 19:46:22,679 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:22,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:22,680 INFO L82 PathProgramCache]: Analyzing trace with hash -504033590, now seen corresponding path program 1 times [2020-10-27 19:46:22,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:22,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739818663] [2020-10-27 19:46:22,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:22,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:22,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:22,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:22,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:23,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:23,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:23,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 19:46:23,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:46:23,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1227 [2020-10-27 19:46:23,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:23,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:46:23,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 19:46:23,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 19:46:23,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:23,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:24,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:24,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:24,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:24,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:24,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:24,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 19:46:24,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:24,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:24,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:24,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:24,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:24,021 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-27 19:46:24,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739818663] [2020-10-27 19:46:24,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:24,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 19:46:24,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533338357] [2020-10-27 19:46:24,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:46:24,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:24,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:46:24,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:46:24,030 INFO L87 Difference]: Start difference. First operand 109 states and 140 transitions. Second operand 6 states. [2020-10-27 19:46:24,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:24,244 INFO L93 Difference]: Finished difference Result 166 states and 215 transitions. [2020-10-27 19:46:24,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:46:24,244 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-10-27 19:46:24,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:24,245 INFO L225 Difference]: With dead ends: 166 [2020-10-27 19:46:24,246 INFO L226 Difference]: Without dead ends: 123 [2020-10-27 19:46:24,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:46:24,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-27 19:46:24,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 110. [2020-10-27 19:46:24,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-27 19:46:24,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 142 transitions. [2020-10-27 19:46:24,260 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 142 transitions. Word has length 31 [2020-10-27 19:46:24,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:24,260 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 142 transitions. [2020-10-27 19:46:24,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:46:24,260 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 142 transitions. [2020-10-27 19:46:24,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 19:46:24,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:24,262 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] [2020-10-27 19:46:24,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 19:46:24,262 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:24,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:24,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1036867019, now seen corresponding path program 1 times [2020-10-27 19:46:24,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:24,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251102413] [2020-10-27 19:46:24,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:24,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:24,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:24,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:24,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:24,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:25,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:26,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:26,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:28,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:28,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 19:46:28,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 19:46:28,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4503 [2020-10-27 19:46:28,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:28,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:46:28,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:28,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 19:46:28,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:28,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:28,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:28,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:28,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:28,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:28,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:28,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:46:28,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:28,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:28,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:28,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:28,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:29,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 19:46:29,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251102413] [2020-10-27 19:46:29,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:29,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 19:46:29,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066904040] [2020-10-27 19:46:29,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:46:29,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:29,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:46:29,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:46:29,004 INFO L87 Difference]: Start difference. First operand 110 states and 142 transitions. Second operand 11 states. [2020-10-27 19:46:29,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:29,653 INFO L93 Difference]: Finished difference Result 193 states and 251 transitions. [2020-10-27 19:46:29,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 19:46:29,653 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-27 19:46:29,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:29,655 INFO L225 Difference]: With dead ends: 193 [2020-10-27 19:46:29,655 INFO L226 Difference]: Without dead ends: 170 [2020-10-27 19:46:29,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-27 19:46:29,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-27 19:46:29,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 123. [2020-10-27 19:46:29,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-27 19:46:29,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 161 transitions. [2020-10-27 19:46:29,676 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 161 transitions. Word has length 33 [2020-10-27 19:46:29,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:29,676 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 161 transitions. [2020-10-27 19:46:29,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:46:29,677 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 161 transitions. [2020-10-27 19:46:29,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 19:46:29,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:29,678 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] [2020-10-27 19:46:29,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 19:46:29,678 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:29,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:29,679 INFO L82 PathProgramCache]: Analyzing trace with hash 643840009, now seen corresponding path program 1 times [2020-10-27 19:46:29,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:29,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572743078] [2020-10-27 19:46:29,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:29,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:29,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:30,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:30,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 19:46:30,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:30,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 685 [2020-10-27 19:46:30,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:30,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:46:30,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:30,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 19:46:30,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:30,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:30,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:30,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:30,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:30,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:30,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:30,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:30,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:30,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:30,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:30,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:30,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:30,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:30,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572743078] [2020-10-27 19:46:30,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:30,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:46:30,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979901762] [2020-10-27 19:46:30,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:46:30,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:30,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:46:30,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:46:30,816 INFO L87 Difference]: Start difference. First operand 123 states and 161 transitions. Second operand 11 states. [2020-10-27 19:46:31,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:31,948 INFO L93 Difference]: Finished difference Result 233 states and 303 transitions. [2020-10-27 19:46:31,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 19:46:31,949 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-27 19:46:31,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:31,951 INFO L225 Difference]: With dead ends: 233 [2020-10-27 19:46:31,951 INFO L226 Difference]: Without dead ends: 229 [2020-10-27 19:46:31,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:46:31,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-27 19:46:31,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 150. [2020-10-27 19:46:31,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-27 19:46:31,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 199 transitions. [2020-10-27 19:46:31,967 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 199 transitions. Word has length 33 [2020-10-27 19:46:31,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:31,968 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 199 transitions. [2020-10-27 19:46:31,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:46:31,968 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 199 transitions. [2020-10-27 19:46:31,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 19:46:31,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:31,969 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 19:46:31,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 19:46:31,969 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:31,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:31,970 INFO L82 PathProgramCache]: Analyzing trace with hash 2146266711, now seen corresponding path program 2 times [2020-10-27 19:46:31,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:31,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599643424] [2020-10-27 19:46:31,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:31,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:32,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:32,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:32,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:32,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 19:46:32,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:32,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 580 [2020-10-27 19:46:32,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:32,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:46:32,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:32,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 19:46:32,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:32,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:32,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:32,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:32,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:32,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:32,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:32,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:32,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:32,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:32,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:32,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:32,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:46:32,695 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 19:46:32,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599643424] [2020-10-27 19:46:32,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:32,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 19:46:32,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780229340] [2020-10-27 19:46:32,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 19:46:32,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:32,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 19:46:32,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:46:32,698 INFO L87 Difference]: Start difference. First operand 150 states and 199 transitions. Second operand 9 states. [2020-10-27 19:46:33,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:33,264 INFO L93 Difference]: Finished difference Result 222 states and 293 transitions. [2020-10-27 19:46:33,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:46:33,264 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-10-27 19:46:33,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:33,266 INFO L225 Difference]: With dead ends: 222 [2020-10-27 19:46:33,266 INFO L226 Difference]: Without dead ends: 161 [2020-10-27 19:46:33,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:46:33,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-27 19:46:33,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 149. [2020-10-27 19:46:33,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-27 19:46:33,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 193 transitions. [2020-10-27 19:46:33,286 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 193 transitions. Word has length 33 [2020-10-27 19:46:33,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:33,287 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 193 transitions. [2020-10-27 19:46:33,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 19:46:33,287 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 193 transitions. [2020-10-27 19:46:33,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 19:46:33,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:33,288 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] [2020-10-27 19:46:33,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 19:46:33,289 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:33,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:33,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1602909289, now seen corresponding path program 1 times [2020-10-27 19:46:33,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:33,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876493532] [2020-10-27 19:46:33,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:33,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:33,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:33,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:33,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:33,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:34,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:34,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:34,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:35,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:38,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:38,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 19:46:38,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 19:46:38,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 19:46:38,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:38,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:46:38,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-27 19:46:38,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 19:46:38,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:38,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:38,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:38,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:38,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:38,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:38,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:38,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:46:38,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:38,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:38,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:38,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:38,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:38,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 19:46:38,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876493532] [2020-10-27 19:46:38,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:38,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 19:46:38,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105664829] [2020-10-27 19:46:38,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:46:38,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:38,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:46:38,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:46:38,439 INFO L87 Difference]: Start difference. First operand 149 states and 193 transitions. Second operand 6 states. [2020-10-27 19:46:38,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:38,712 INFO L93 Difference]: Finished difference Result 162 states and 207 transitions. [2020-10-27 19:46:38,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 19:46:38,713 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2020-10-27 19:46:38,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:38,714 INFO L225 Difference]: With dead ends: 162 [2020-10-27 19:46:38,714 INFO L226 Difference]: Without dead ends: 158 [2020-10-27 19:46:38,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:46:38,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-27 19:46:38,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 153. [2020-10-27 19:46:38,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-27 19:46:38,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 197 transitions. [2020-10-27 19:46:38,738 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 197 transitions. Word has length 34 [2020-10-27 19:46:38,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:38,739 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 197 transitions. [2020-10-27 19:46:38,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:46:38,739 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 197 transitions. [2020-10-27 19:46:38,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 19:46:38,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:38,742 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] [2020-10-27 19:46:38,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 19:46:38,742 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:38,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:38,743 INFO L82 PathProgramCache]: Analyzing trace with hash 793562663, now seen corresponding path program 1 times [2020-10-27 19:46:38,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:38,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354883573] [2020-10-27 19:46:38,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:38,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:38,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:38,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:38,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:38,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:39,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:39,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:40,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:40,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:41,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:41,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:41,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:41,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:41,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:41,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:41,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:43,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:43,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 19:46:43,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 19:46:43,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 19:46:43,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:43,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 19:46:43,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 19:46:43,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 19:46:43,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:43,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:43,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:43,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:43,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:43,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:43,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:43,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:46:43,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:43,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:43,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:43,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:43,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:43,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 19:46:43,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354883573] [2020-10-27 19:46:43,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:43,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 19:46:43,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811539685] [2020-10-27 19:46:43,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:46:43,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:43,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:46:43,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:46:43,850 INFO L87 Difference]: Start difference. First operand 153 states and 197 transitions. Second operand 5 states. [2020-10-27 19:46:43,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:43,997 INFO L93 Difference]: Finished difference Result 166 states and 211 transitions. [2020-10-27 19:46:43,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:46:43,999 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-10-27 19:46:44,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:44,001 INFO L225 Difference]: With dead ends: 166 [2020-10-27 19:46:44,001 INFO L226 Difference]: Without dead ends: 152 [2020-10-27 19:46:44,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:46:44,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-27 19:46:44,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2020-10-27 19:46:44,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-27 19:46:44,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 193 transitions. [2020-10-27 19:46:44,017 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 193 transitions. Word has length 34 [2020-10-27 19:46:44,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:44,017 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 193 transitions. [2020-10-27 19:46:44,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:46:44,018 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 193 transitions. [2020-10-27 19:46:44,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 19:46:44,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:44,018 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] [2020-10-27 19:46:44,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 19:46:44,019 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:44,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:44,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1656079315, now seen corresponding path program 3 times [2020-10-27 19:46:44,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:44,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252748900] [2020-10-27 19:46:44,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:44,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:44,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:44,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:45,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:45,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 19:46:45,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:45,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 938 [2020-10-27 19:46:45,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:45,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:46:45,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:45,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 19:46:45,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:45,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:45,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:45,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:45,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:45,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:45,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:45,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:45,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:45,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:45,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:45,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:45,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:45,263 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:45,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252748900] [2020-10-27 19:46:45,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:45,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:46:45,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318309326] [2020-10-27 19:46:45,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:46:45,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:45,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:46:45,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:46:45,268 INFO L87 Difference]: Start difference. First operand 152 states and 193 transitions. Second operand 11 states. [2020-10-27 19:46:46,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:46,376 INFO L93 Difference]: Finished difference Result 244 states and 303 transitions. [2020-10-27 19:46:46,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 19:46:46,377 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-10-27 19:46:46,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:46,378 INFO L225 Difference]: With dead ends: 244 [2020-10-27 19:46:46,378 INFO L226 Difference]: Without dead ends: 240 [2020-10-27 19:46:46,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2020-10-27 19:46:46,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-27 19:46:46,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 161. [2020-10-27 19:46:46,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-27 19:46:46,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 206 transitions. [2020-10-27 19:46:46,398 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 206 transitions. Word has length 34 [2020-10-27 19:46:46,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:46,398 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 206 transitions. [2020-10-27 19:46:46,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:46:46,398 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 206 transitions. [2020-10-27 19:46:46,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 19:46:46,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:46,399 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] [2020-10-27 19:46:46,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 19:46:46,399 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:46,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:46,400 INFO L82 PathProgramCache]: Analyzing trace with hash 285698622, now seen corresponding path program 1 times [2020-10-27 19:46:46,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:46,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956249571] [2020-10-27 19:46:46,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:46,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:46,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:46,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:47,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:47,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 19:46:47,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:47,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1318 [2020-10-27 19:46:47,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:47,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:46:47,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 19:46:47,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 19:46:47,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:47,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:47,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:47,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:47,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:47,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:47,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:47,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:46:47,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:47,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:47,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:47,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:47,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:47,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 19:46:47,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956249571] [2020-10-27 19:46:47,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:47,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 19:46:47,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666727551] [2020-10-27 19:46:47,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:46:47,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:47,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:46:47,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:46:47,817 INFO L87 Difference]: Start difference. First operand 161 states and 206 transitions. Second operand 6 states. [2020-10-27 19:46:47,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:47,987 INFO L93 Difference]: Finished difference Result 164 states and 208 transitions. [2020-10-27 19:46:47,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 19:46:47,988 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-10-27 19:46:47,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:47,989 INFO L225 Difference]: With dead ends: 164 [2020-10-27 19:46:47,990 INFO L226 Difference]: Without dead ends: 160 [2020-10-27 19:46:47,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:46:47,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-27 19:46:48,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2020-10-27 19:46:48,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-27 19:46:48,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 204 transitions. [2020-10-27 19:46:48,013 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 204 transitions. Word has length 35 [2020-10-27 19:46:48,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:48,013 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 204 transitions. [2020-10-27 19:46:48,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:46:48,013 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 204 transitions. [2020-10-27 19:46:48,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 19:46:48,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:48,014 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:48,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 19:46:48,015 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:48,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:48,016 INFO L82 PathProgramCache]: Analyzing trace with hash 37094625, now seen corresponding path program 3 times [2020-10-27 19:46:48,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:48,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921113383] [2020-10-27 19:46:48,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:48,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:48,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:48,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:48,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 19:46:48,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:48,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 753 [2020-10-27 19:46:48,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:48,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:46:48,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:48,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 19:46:48,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:49,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:49,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:49,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:49,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:49,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:49,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:49,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:46:49,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:49,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:49,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:49,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:49,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:49,070 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:49,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921113383] [2020-10-27 19:46:49,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:49,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:46:49,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164718434] [2020-10-27 19:46:49,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:46:49,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:49,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:46:49,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:46:49,076 INFO L87 Difference]: Start difference. First operand 160 states and 204 transitions. Second operand 12 states. [2020-10-27 19:46:50,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:50,079 INFO L93 Difference]: Finished difference Result 253 states and 320 transitions. [2020-10-27 19:46:50,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 19:46:50,079 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-27 19:46:50,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:50,081 INFO L225 Difference]: With dead ends: 253 [2020-10-27 19:46:50,081 INFO L226 Difference]: Without dead ends: 249 [2020-10-27 19:46:50,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-27 19:46:50,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-27 19:46:50,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 176. [2020-10-27 19:46:50,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-27 19:46:50,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 226 transitions. [2020-10-27 19:46:50,105 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 226 transitions. Word has length 35 [2020-10-27 19:46:50,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:50,106 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 226 transitions. [2020-10-27 19:46:50,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:46:50,106 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 226 transitions. [2020-10-27 19:46:50,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 19:46:50,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:50,107 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:50,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 19:46:50,107 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:50,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:50,108 INFO L82 PathProgramCache]: Analyzing trace with hash 2022362273, now seen corresponding path program 2 times [2020-10-27 19:46:50,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:50,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1504601505] [2020-10-27 19:46:50,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:50,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:50,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:50,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:50,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 19:46:50,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:50,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 673 [2020-10-27 19:46:50,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:50,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:46:50,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:50,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 19:46:50,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:51,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:51,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:51,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:51,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:51,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:51,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:51,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:46:51,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:51,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:51,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:51,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:51,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:51,087 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:51,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1504601505] [2020-10-27 19:46:51,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:51,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:46:51,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790085601] [2020-10-27 19:46:51,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:46:51,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:51,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:46:51,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:46:51,090 INFO L87 Difference]: Start difference. First operand 176 states and 226 transitions. Second operand 11 states. [2020-10-27 19:46:51,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:51,820 INFO L93 Difference]: Finished difference Result 318 states and 404 transitions. [2020-10-27 19:46:51,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 19:46:51,820 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-27 19:46:51,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:51,822 INFO L225 Difference]: With dead ends: 318 [2020-10-27 19:46:51,822 INFO L226 Difference]: Without dead ends: 257 [2020-10-27 19:46:51,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:46:51,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-27 19:46:51,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 187. [2020-10-27 19:46:51,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-27 19:46:51,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 240 transitions. [2020-10-27 19:46:51,842 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 240 transitions. Word has length 35 [2020-10-27 19:46:51,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:51,842 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 240 transitions. [2020-10-27 19:46:51,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:46:51,842 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 240 transitions. [2020-10-27 19:46:51,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 19:46:51,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:51,843 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:51,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 19:46:51,844 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:51,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:51,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1424623202, now seen corresponding path program 1 times [2020-10-27 19:46:51,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:51,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549490721] [2020-10-27 19:46:51,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:51,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:51,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:51,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:51,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:51,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:52,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:52,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:52,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:53,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:53,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:54,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:54,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:56,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:56,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 19:46:56,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 19:46:56,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 19:46:56,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:56,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:46:56,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-27 19:46:56,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 19:46:56,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:56,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:56,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:56,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:56,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:56,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:56,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:56,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:56,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:56,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:56,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:56,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:56,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:56,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 19:46:56,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549490721] [2020-10-27 19:46:56,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:56,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 19:46:56,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621847113] [2020-10-27 19:46:56,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:46:56,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:56,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:46:56,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:46:56,932 INFO L87 Difference]: Start difference. First operand 187 states and 240 transitions. Second operand 6 states. [2020-10-27 19:46:57,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:57,186 INFO L93 Difference]: Finished difference Result 190 states and 242 transitions. [2020-10-27 19:46:57,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 19:46:57,186 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-10-27 19:46:57,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:57,188 INFO L225 Difference]: With dead ends: 190 [2020-10-27 19:46:57,188 INFO L226 Difference]: Without dead ends: 186 [2020-10-27 19:46:57,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:46:57,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-27 19:46:57,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2020-10-27 19:46:57,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-27 19:46:57,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 238 transitions. [2020-10-27 19:46:57,207 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 238 transitions. Word has length 36 [2020-10-27 19:46:57,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:57,207 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 238 transitions. [2020-10-27 19:46:57,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:46:57,208 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 238 transitions. [2020-10-27 19:46:57,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 19:46:57,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:57,209 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] [2020-10-27 19:46:57,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 19:46:57,209 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:57,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:57,209 INFO L82 PathProgramCache]: Analyzing trace with hash -143166156, now seen corresponding path program 1 times [2020-10-27 19:46:57,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:57,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914375939] [2020-10-27 19:46:57,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:57,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:57,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:57,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:57,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:57,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 19:46:57,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:57,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 686 [2020-10-27 19:46:57,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:57,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:46:57,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:57,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 19:46:57,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:58,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:58,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:58,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:58,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:58,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:58,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:58,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:46:58,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:58,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:58,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:58,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:58,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:58,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:58,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914375939] [2020-10-27 19:46:58,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:58,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 19:46:58,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329481409] [2020-10-27 19:46:58,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:46:58,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:58,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:46:58,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:46:58,030 INFO L87 Difference]: Start difference. First operand 186 states and 238 transitions. Second operand 8 states. [2020-10-27 19:46:58,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:58,367 INFO L93 Difference]: Finished difference Result 234 states and 290 transitions. [2020-10-27 19:46:58,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 19:46:58,368 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-27 19:46:58,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:58,369 INFO L225 Difference]: With dead ends: 234 [2020-10-27 19:46:58,369 INFO L226 Difference]: Without dead ends: 195 [2020-10-27 19:46:58,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:46:58,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-27 19:46:58,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 184. [2020-10-27 19:46:58,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-27 19:46:58,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 235 transitions. [2020-10-27 19:46:58,384 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 235 transitions. Word has length 36 [2020-10-27 19:46:58,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:58,385 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 235 transitions. [2020-10-27 19:46:58,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:46:58,385 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 235 transitions. [2020-10-27 19:46:58,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 19:46:58,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:58,386 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:58,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 19:46:58,386 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:58,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:58,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1550828244, now seen corresponding path program 4 times [2020-10-27 19:46:58,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:58,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511965714] [2020-10-27 19:46:58,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:58,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:58,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:58,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:58,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:58,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:00,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:00,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 19:47:00,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:47:00,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2412 [2020-10-27 19:47:00,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:00,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:47:00,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:00,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 19:47:00,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:01,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:01,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:01,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:01,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:01,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:01,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:01,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:01,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:01,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:01,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:01,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:01,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:01,114 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:01,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511965714] [2020-10-27 19:47:01,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:01,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:47:01,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013996369] [2020-10-27 19:47:01,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:47:01,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:01,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:47:01,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:47:01,116 INFO L87 Difference]: Start difference. First operand 184 states and 235 transitions. Second operand 11 states. [2020-10-27 19:47:02,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:02,224 INFO L93 Difference]: Finished difference Result 271 states and 336 transitions. [2020-10-27 19:47:02,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 19:47:02,224 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-10-27 19:47:02,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:02,226 INFO L225 Difference]: With dead ends: 271 [2020-10-27 19:47:02,226 INFO L226 Difference]: Without dead ends: 236 [2020-10-27 19:47:02,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-10-27 19:47:02,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-27 19:47:02,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 188. [2020-10-27 19:47:02,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-27 19:47:02,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 241 transitions. [2020-10-27 19:47:02,246 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 241 transitions. Word has length 37 [2020-10-27 19:47:02,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:02,246 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 241 transitions. [2020-10-27 19:47:02,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:47:02,246 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 241 transitions. [2020-10-27 19:47:02,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 19:47:02,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:02,247 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 19:47:02,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 19:47:02,248 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:02,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:02,248 INFO L82 PathProgramCache]: Analyzing trace with hash -301905928, now seen corresponding path program 5 times [2020-10-27 19:47:02,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:02,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087736051] [2020-10-27 19:47:02,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:02,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:02,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:02,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:03,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:03,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 19:47:03,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:47:03,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1282 [2020-10-27 19:47:03,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:03,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:47:03,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:03,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 19:47:03,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:03,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:03,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:03,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:03,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:03,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:03,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:03,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:47:03,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:03,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:03,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:03,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:03,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:03,830 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:03,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087736051] [2020-10-27 19:47:03,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:03,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:47:03,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677229638] [2020-10-27 19:47:03,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:47:03,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:03,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:47:03,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:47:03,835 INFO L87 Difference]: Start difference. First operand 188 states and 241 transitions. Second operand 13 states. [2020-10-27 19:47:05,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:05,111 INFO L93 Difference]: Finished difference Result 295 states and 367 transitions. [2020-10-27 19:47:05,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 19:47:05,112 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-27 19:47:05,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:05,114 INFO L225 Difference]: With dead ends: 295 [2020-10-27 19:47:05,114 INFO L226 Difference]: Without dead ends: 291 [2020-10-27 19:47:05,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:47:05,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-27 19:47:05,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 208. [2020-10-27 19:47:05,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-27 19:47:05,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 268 transitions. [2020-10-27 19:47:05,133 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 268 transitions. Word has length 38 [2020-10-27 19:47:05,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:05,133 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 268 transitions. [2020-10-27 19:47:05,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:47:05,133 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 268 transitions. [2020-10-27 19:47:05,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 19:47:05,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:05,134 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:05,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 19:47:05,134 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:05,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:05,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1309517944, now seen corresponding path program 1 times [2020-10-27 19:47:05,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:05,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850846214] [2020-10-27 19:47:05,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:05,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:05,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:05,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:05,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 19:47:05,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:05,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 505 [2020-10-27 19:47:05,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:05,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:47:05,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:05,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 19:47:05,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:05,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:05,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:05,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:05,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:05,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:05,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:05,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:05,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:05,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:05,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:05,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:05,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:05,950 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:05,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850846214] [2020-10-27 19:47:05,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:05,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:47:05,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438421953] [2020-10-27 19:47:05,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:47:05,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:05,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:47:05,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:47:05,953 INFO L87 Difference]: Start difference. First operand 208 states and 268 transitions. Second operand 12 states. [2020-10-27 19:47:07,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:07,041 INFO L93 Difference]: Finished difference Result 330 states and 413 transitions. [2020-10-27 19:47:07,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:47:07,041 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-10-27 19:47:07,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:07,043 INFO L225 Difference]: With dead ends: 330 [2020-10-27 19:47:07,043 INFO L226 Difference]: Without dead ends: 283 [2020-10-27 19:47:07,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:47:07,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-27 19:47:07,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 225. [2020-10-27 19:47:07,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-10-27 19:47:07,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 289 transitions. [2020-10-27 19:47:07,063 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 289 transitions. Word has length 38 [2020-10-27 19:47:07,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:07,063 INFO L481 AbstractCegarLoop]: Abstraction has 225 states and 289 transitions. [2020-10-27 19:47:07,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:47:07,064 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 289 transitions. [2020-10-27 19:47:07,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 19:47:07,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:07,065 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:07,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 19:47:07,065 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:07,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:07,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1231516458, now seen corresponding path program 1 times [2020-10-27 19:47:07,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:07,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15371162] [2020-10-27 19:47:07,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:07,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:07,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:07,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:07,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 19:47:07,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:07,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 440 [2020-10-27 19:47:07,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:07,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:47:07,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:07,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 19:47:07,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:07,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:07,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:07,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:07,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:07,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:07,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:07,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:07,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:07,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:07,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:07,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:07,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:07,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:07,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15371162] [2020-10-27 19:47:07,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:07,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 19:47:07,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885258279] [2020-10-27 19:47:07,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 19:47:07,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:07,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 19:47:07,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:47:07,703 INFO L87 Difference]: Start difference. First operand 225 states and 289 transitions. Second operand 9 states. [2020-10-27 19:47:08,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:08,261 INFO L93 Difference]: Finished difference Result 262 states and 329 transitions. [2020-10-27 19:47:08,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:47:08,263 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2020-10-27 19:47:08,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:08,265 INFO L225 Difference]: With dead ends: 262 [2020-10-27 19:47:08,265 INFO L226 Difference]: Without dead ends: 237 [2020-10-27 19:47:08,265 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 [2020-10-27 19:47:08,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-27 19:47:08,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 230. [2020-10-27 19:47:08,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-27 19:47:08,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 294 transitions. [2020-10-27 19:47:08,283 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 294 transitions. Word has length 39 [2020-10-27 19:47:08,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:08,284 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 294 transitions. [2020-10-27 19:47:08,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 19:47:08,284 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 294 transitions. [2020-10-27 19:47:08,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 19:47:08,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:08,285 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:08,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 19:47:08,285 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:08,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:08,286 INFO L82 PathProgramCache]: Analyzing trace with hash -933203338, now seen corresponding path program 4 times [2020-10-27 19:47:08,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:08,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649872977] [2020-10-27 19:47:08,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:08,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:08,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:09,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:09,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 19:47:09,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:09,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 818 [2020-10-27 19:47:09,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:09,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:47:09,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:09,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 19:47:09,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:09,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:09,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:09,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:09,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:09,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:09,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:09,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:09,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:09,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:09,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:09,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:09,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:09,488 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:09,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649872977] [2020-10-27 19:47:09,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:09,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:47:09,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601402426] [2020-10-27 19:47:09,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:47:09,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:09,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:47:09,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:47:09,490 INFO L87 Difference]: Start difference. First operand 230 states and 294 transitions. Second operand 13 states. [2020-10-27 19:47:10,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:10,360 INFO L93 Difference]: Finished difference Result 317 states and 403 transitions. [2020-10-27 19:47:10,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:47:10,360 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-10-27 19:47:10,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:10,363 INFO L225 Difference]: With dead ends: 317 [2020-10-27 19:47:10,363 INFO L226 Difference]: Without dead ends: 313 [2020-10-27 19:47:10,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:47:10,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-27 19:47:10,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 230. [2020-10-27 19:47:10,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-27 19:47:10,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 293 transitions. [2020-10-27 19:47:10,387 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 293 transitions. Word has length 39 [2020-10-27 19:47:10,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:10,387 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 293 transitions. [2020-10-27 19:47:10,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:47:10,387 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 293 transitions. [2020-10-27 19:47:10,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 19:47:10,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:10,389 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] [2020-10-27 19:47:10,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 19:47:10,389 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:10,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:10,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1450242431, now seen corresponding path program 1 times [2020-10-27 19:47:10,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:10,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541724375] [2020-10-27 19:47:10,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:10,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:10,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:10,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:11,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:11,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 19:47:11,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:47:11,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1375 [2020-10-27 19:47:11,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:11,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:47:11,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:11,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 19:47:11,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:12,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:12,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:12,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:12,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:12,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:12,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:12,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:12,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:12,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:12,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:12,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:12,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:12,400 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:12,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541724375] [2020-10-27 19:47:12,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:12,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:47:12,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023609032] [2020-10-27 19:47:12,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:47:12,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:12,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:47:12,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:47:12,402 INFO L87 Difference]: Start difference. First operand 230 states and 293 transitions. Second operand 13 states. [2020-10-27 19:47:13,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:13,863 INFO L93 Difference]: Finished difference Result 304 states and 375 transitions. [2020-10-27 19:47:13,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 19:47:13,864 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-10-27 19:47:13,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:13,866 INFO L225 Difference]: With dead ends: 304 [2020-10-27 19:47:13,867 INFO L226 Difference]: Without dead ends: 300 [2020-10-27 19:47:13,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-10-27 19:47:13,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-10-27 19:47:13,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 224. [2020-10-27 19:47:13,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-27 19:47:13,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 286 transitions. [2020-10-27 19:47:13,889 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 286 transitions. Word has length 40 [2020-10-27 19:47:13,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:13,889 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 286 transitions. [2020-10-27 19:47:13,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:47:13,889 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 286 transitions. [2020-10-27 19:47:13,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 19:47:13,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:13,890 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-27 19:47:13,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 19:47:13,891 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:13,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:13,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1342298163, now seen corresponding path program 6 times [2020-10-27 19:47:13,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:13,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394901806] [2020-10-27 19:47:13,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:13,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:13,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:14,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:14,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:15,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:15,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 19:47:15,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:47:15,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1166 [2020-10-27 19:47:15,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:15,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:47:15,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:15,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 19:47:15,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:15,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:15,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:15,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:15,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:15,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:15,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:15,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:47:15,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:15,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:15,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:15,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:15,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:15,274 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 19:47:15,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394901806] [2020-10-27 19:47:15,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:15,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:47:15,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656952558] [2020-10-27 19:47:15,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:47:15,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:15,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:47:15,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:47:15,276 INFO L87 Difference]: Start difference. First operand 224 states and 286 transitions. Second operand 10 states. [2020-10-27 19:47:15,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:15,817 INFO L93 Difference]: Finished difference Result 308 states and 388 transitions. [2020-10-27 19:47:15,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:47:15,817 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-27 19:47:15,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:15,819 INFO L225 Difference]: With dead ends: 308 [2020-10-27 19:47:15,819 INFO L226 Difference]: Without dead ends: 243 [2020-10-27 19:47:15,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:47:15,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-27 19:47:15,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 224. [2020-10-27 19:47:15,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-27 19:47:15,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 285 transitions. [2020-10-27 19:47:15,847 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 285 transitions. Word has length 40 [2020-10-27 19:47:15,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:15,847 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 285 transitions. [2020-10-27 19:47:15,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:47:15,847 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 285 transitions. [2020-10-27 19:47:15,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 19:47:15,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:15,848 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:15,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 19:47:15,849 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:15,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:15,849 INFO L82 PathProgramCache]: Analyzing trace with hash -365938675, now seen corresponding path program 2 times [2020-10-27 19:47:15,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:15,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285291184] [2020-10-27 19:47:15,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:15,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:15,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:16,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:16,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:16,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 19:47:16,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:47:16,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 942 [2020-10-27 19:47:16,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:16,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:47:16,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:16,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 19:47:16,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:16,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:16,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:16,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:16,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:16,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:16,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:16,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:16,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:16,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:16,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:16,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:16,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:17,008 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 19:47:17,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285291184] [2020-10-27 19:47:17,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:17,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:47:17,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482056643] [2020-10-27 19:47:17,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:47:17,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:17,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:47:17,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:47:17,010 INFO L87 Difference]: Start difference. First operand 224 states and 285 transitions. Second operand 11 states. [2020-10-27 19:47:18,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:18,021 INFO L93 Difference]: Finished difference Result 289 states and 358 transitions. [2020-10-27 19:47:18,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 19:47:18,022 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-10-27 19:47:18,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:18,023 INFO L225 Difference]: With dead ends: 289 [2020-10-27 19:47:18,023 INFO L226 Difference]: Without dead ends: 247 [2020-10-27 19:47:18,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-27 19:47:18,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-10-27 19:47:18,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 223. [2020-10-27 19:47:18,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-27 19:47:18,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 282 transitions. [2020-10-27 19:47:18,045 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 282 transitions. Word has length 40 [2020-10-27 19:47:18,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:18,045 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 282 transitions. [2020-10-27 19:47:18,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:47:18,045 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 282 transitions. [2020-10-27 19:47:18,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 19:47:18,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:18,046 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:18,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 19:47:18,046 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:18,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:18,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1328615050, now seen corresponding path program 1 times [2020-10-27 19:47:18,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:18,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625980835] [2020-10-27 19:47:18,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:18,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:18,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:18,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:18,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:18,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:18,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:18,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:20,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:20,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:20,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:20,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:21,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:21,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:21,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:22,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:23,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:23,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 19:47:23,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 19:47:23,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 19:47:23,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:23,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:47:23,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:23,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 19:47:23,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:23,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:23,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:23,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:23,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:23,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:23,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:23,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:47:23,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:23,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:23,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:23,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:23,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:23,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:23,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625980835] [2020-10-27 19:47:23,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:23,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:47:23,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472305765] [2020-10-27 19:47:23,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:47:23,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:23,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:47:23,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:47:23,650 INFO L87 Difference]: Start difference. First operand 223 states and 282 transitions. Second operand 13 states. [2020-10-27 19:47:25,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:25,707 INFO L93 Difference]: Finished difference Result 362 states and 436 transitions. [2020-10-27 19:47:25,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 19:47:25,707 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-10-27 19:47:25,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:25,709 INFO L225 Difference]: With dead ends: 362 [2020-10-27 19:47:25,709 INFO L226 Difference]: Without dead ends: 358 [2020-10-27 19:47:25,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=172, Invalid=640, Unknown=0, NotChecked=0, Total=812 [2020-10-27 19:47:25,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-10-27 19:47:25,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 247. [2020-10-27 19:47:25,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-10-27 19:47:25,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 309 transitions. [2020-10-27 19:47:25,743 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 309 transitions. Word has length 41 [2020-10-27 19:47:25,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:25,743 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 309 transitions. [2020-10-27 19:47:25,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:47:25,744 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 309 transitions. [2020-10-27 19:47:25,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 19:47:25,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:25,752 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:25,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 19:47:25,752 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:25,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:25,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1999267455, now seen corresponding path program 7 times [2020-10-27 19:47:25,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:25,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215948230] [2020-10-27 19:47:25,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:25,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:25,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:26,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:26,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:27,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:27,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 19:47:27,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:47:27,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1938 [2020-10-27 19:47:27,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:27,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:47:27,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:27,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 19:47:27,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:28,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:28,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:28,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:28,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:28,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:28,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:47:28,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:28,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:28,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:28,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:28,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:28,026 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:28,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215948230] [2020-10-27 19:47:28,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:28,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:47:28,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532504205] [2020-10-27 19:47:28,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:47:28,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:28,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:47:28,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:47:28,028 INFO L87 Difference]: Start difference. First operand 247 states and 309 transitions. Second operand 13 states. [2020-10-27 19:47:29,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:29,711 INFO L93 Difference]: Finished difference Result 341 states and 417 transitions. [2020-10-27 19:47:29,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 19:47:29,712 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-10-27 19:47:29,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:29,715 INFO L225 Difference]: With dead ends: 341 [2020-10-27 19:47:29,715 INFO L226 Difference]: Without dead ends: 337 [2020-10-27 19:47:29,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:47:29,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-27 19:47:29,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 256. [2020-10-27 19:47:29,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-27 19:47:29,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 322 transitions. [2020-10-27 19:47:29,739 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 322 transitions. Word has length 41 [2020-10-27 19:47:29,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:29,740 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 322 transitions. [2020-10-27 19:47:29,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:47:29,740 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 322 transitions. [2020-10-27 19:47:29,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 19:47:29,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:29,741 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] [2020-10-27 19:47:29,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 19:47:29,741 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:29,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:29,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1819325621, now seen corresponding path program 1 times [2020-10-27 19:47:29,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:29,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96892785] [2020-10-27 19:47:29,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:29,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:29,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:30,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:30,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 19:47:30,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:30,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 636 [2020-10-27 19:47:30,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:30,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:47:30,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:30,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 19:47:30,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:30,628 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 40 [2020-10-27 19:47:30,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:30,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:30,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:30,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:30,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:30,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:30,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:30,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:30,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:30,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:30,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:30,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:30,750 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:30,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96892785] [2020-10-27 19:47:30,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:30,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:47:30,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324184325] [2020-10-27 19:47:30,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:47:30,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:30,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:47:30,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:47:30,752 INFO L87 Difference]: Start difference. First operand 256 states and 322 transitions. Second operand 12 states. [2020-10-27 19:47:31,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:31,368 INFO L93 Difference]: Finished difference Result 315 states and 386 transitions. [2020-10-27 19:47:31,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:47:31,368 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2020-10-27 19:47:31,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:31,371 INFO L225 Difference]: With dead ends: 315 [2020-10-27 19:47:31,371 INFO L226 Difference]: Without dead ends: 291 [2020-10-27 19:47:31,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:47:31,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-27 19:47:31,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 266. [2020-10-27 19:47:31,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-27 19:47:31,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 333 transitions. [2020-10-27 19:47:31,407 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 333 transitions. Word has length 42 [2020-10-27 19:47:31,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:31,407 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 333 transitions. [2020-10-27 19:47:31,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:47:31,407 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 333 transitions. [2020-10-27 19:47:31,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 19:47:31,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:31,409 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] [2020-10-27 19:47:31,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 19:47:31,410 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:31,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:31,410 INFO L82 PathProgramCache]: Analyzing trace with hash -427294605, now seen corresponding path program 1 times [2020-10-27 19:47:31,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:31,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550295116] [2020-10-27 19:47:31,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:31,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:31,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:31,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:31,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:31,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:31,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:31,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:33,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:33,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 19:47:33,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 19:47:33,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1754 [2020-10-27 19:47:33,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:33,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:47:33,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:33,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 19:47:33,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:33,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:33,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:33,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:33,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:33,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:33,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:33,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:47:33,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:33,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:33,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:33,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:33,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:33,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 19:47:33,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550295116] [2020-10-27 19:47:33,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:33,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 19:47:33,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245002668] [2020-10-27 19:47:33,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:47:33,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:33,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:47:33,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:47:33,272 INFO L87 Difference]: Start difference. First operand 266 states and 333 transitions. Second operand 8 states. [2020-10-27 19:47:33,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:33,577 INFO L93 Difference]: Finished difference Result 322 states and 394 transitions. [2020-10-27 19:47:33,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 19:47:33,577 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-10-27 19:47:33,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:33,579 INFO L225 Difference]: With dead ends: 322 [2020-10-27 19:47:33,579 INFO L226 Difference]: Without dead ends: 259 [2020-10-27 19:47:33,580 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 [2020-10-27 19:47:33,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-27 19:47:33,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2020-10-27 19:47:33,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-27 19:47:33,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 323 transitions. [2020-10-27 19:47:33,606 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 323 transitions. Word has length 42 [2020-10-27 19:47:33,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:33,606 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 323 transitions. [2020-10-27 19:47:33,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:47:33,606 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 323 transitions. [2020-10-27 19:47:33,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 19:47:33,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:33,607 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] [2020-10-27 19:47:33,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 19:47:33,608 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:33,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:33,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1318619581, now seen corresponding path program 8 times [2020-10-27 19:47:33,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:33,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393989777] [2020-10-27 19:47:33,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:33,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:33,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:34,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:35,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:35,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 19:47:35,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:47:35,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1509 [2020-10-27 19:47:35,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:35,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:47:35,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:35,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 19:47:35,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:35,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:35,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:35,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:35,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:35,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:35,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:35,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:35,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:35,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:35,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:35,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:35,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:35,668 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:35,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393989777] [2020-10-27 19:47:35,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:35,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:47:35,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130437467] [2020-10-27 19:47:35,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:47:35,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:35,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:47:35,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:47:35,670 INFO L87 Difference]: Start difference. First operand 259 states and 323 transitions. Second operand 12 states. [2020-10-27 19:47:36,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:36,455 INFO L93 Difference]: Finished difference Result 401 states and 500 transitions. [2020-10-27 19:47:36,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:47:36,457 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2020-10-27 19:47:36,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:36,459 INFO L225 Difference]: With dead ends: 401 [2020-10-27 19:47:36,460 INFO L226 Difference]: Without dead ends: 325 [2020-10-27 19:47:36,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:47:36,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-10-27 19:47:36,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 259. [2020-10-27 19:47:36,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-27 19:47:36,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 321 transitions. [2020-10-27 19:47:36,486 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 321 transitions. Word has length 42 [2020-10-27 19:47:36,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:36,486 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 321 transitions. [2020-10-27 19:47:36,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:47:36,486 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 321 transitions. [2020-10-27 19:47:36,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 19:47:36,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:36,487 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] [2020-10-27 19:47:36,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 19:47:36,488 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:36,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:36,488 INFO L82 PathProgramCache]: Analyzing trace with hash 659977859, now seen corresponding path program 3 times [2020-10-27 19:47:36,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:36,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769454949] [2020-10-27 19:47:36,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:36,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:36,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:37,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:37,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 19:47:37,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:37,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1224 [2020-10-27 19:47:37,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:37,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:47:37,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:37,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 19:47:37,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:38,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:38,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:38,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:38,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:38,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:38,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:38,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:38,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:38,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:38,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:38,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:38,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:38,328 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:38,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769454949] [2020-10-27 19:47:38,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:38,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:47:38,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339283359] [2020-10-27 19:47:38,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:47:38,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:38,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:47:38,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:47:38,330 INFO L87 Difference]: Start difference. First operand 259 states and 321 transitions. Second operand 14 states. [2020-10-27 19:47:40,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:40,040 INFO L93 Difference]: Finished difference Result 385 states and 476 transitions. [2020-10-27 19:47:40,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 19:47:40,040 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-10-27 19:47:40,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:40,043 INFO L225 Difference]: With dead ends: 385 [2020-10-27 19:47:40,043 INFO L226 Difference]: Without dead ends: 381 [2020-10-27 19:47:40,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:47:40,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2020-10-27 19:47:40,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 293. [2020-10-27 19:47:40,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2020-10-27 19:47:40,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 367 transitions. [2020-10-27 19:47:40,072 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 367 transitions. Word has length 42 [2020-10-27 19:47:40,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:40,072 INFO L481 AbstractCegarLoop]: Abstraction has 293 states and 367 transitions. [2020-10-27 19:47:40,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:47:40,072 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 367 transitions. [2020-10-27 19:47:40,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 19:47:40,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:40,074 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] [2020-10-27 19:47:40,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 19:47:40,074 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:40,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:40,074 INFO L82 PathProgramCache]: Analyzing trace with hash 2068813507, now seen corresponding path program 4 times [2020-10-27 19:47:40,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:40,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939387129] [2020-10-27 19:47:40,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:40,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:40,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:41,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:41,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 19:47:41,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:41,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1018 [2020-10-27 19:47:41,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:41,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:47:41,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:41,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 19:47:41,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:41,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:41,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:41,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:41,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:41,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:41,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:41,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:41,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:41,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:41,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:41,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:41,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:41,608 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:41,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939387129] [2020-10-27 19:47:41,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:41,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:47:41,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491044724] [2020-10-27 19:47:41,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:47:41,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:41,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:47:41,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:47:41,610 INFO L87 Difference]: Start difference. First operand 293 states and 367 transitions. Second operand 13 states. [2020-10-27 19:47:42,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:42,735 INFO L93 Difference]: Finished difference Result 424 states and 525 transitions. [2020-10-27 19:47:42,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:47:42,736 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-10-27 19:47:42,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:42,738 INFO L225 Difference]: With dead ends: 424 [2020-10-27 19:47:42,738 INFO L226 Difference]: Without dead ends: 377 [2020-10-27 19:47:42,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:47:42,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-10-27 19:47:42,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 307. [2020-10-27 19:47:42,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-10-27 19:47:42,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 385 transitions. [2020-10-27 19:47:42,769 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 385 transitions. Word has length 42 [2020-10-27 19:47:42,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:42,769 INFO L481 AbstractCegarLoop]: Abstraction has 307 states and 385 transitions. [2020-10-27 19:47:42,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:47:42,769 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 385 transitions. [2020-10-27 19:47:42,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 19:47:42,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:42,770 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1] [2020-10-27 19:47:42,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 19:47:42,771 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:42,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:42,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1055660672, now seen corresponding path program 1 times [2020-10-27 19:47:42,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:42,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946977712] [2020-10-27 19:47:42,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:42,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:42,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:43,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:43,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:43,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 19:47:43,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:47:43,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 939 [2020-10-27 19:47:43,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:43,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:47:43,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:43,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 19:47:43,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:43,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:43,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:43,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:43,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:43,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:43,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:43,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:43,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:43,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:43,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:43,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:43,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:43,992 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:43,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946977712] [2020-10-27 19:47:43,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:43,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:47:43,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062644395] [2020-10-27 19:47:43,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:47:43,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:43,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:47:43,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:47:43,994 INFO L87 Difference]: Start difference. First operand 307 states and 385 transitions. Second operand 10 states. [2020-10-27 19:47:44,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:44,781 INFO L93 Difference]: Finished difference Result 361 states and 442 transitions. [2020-10-27 19:47:44,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:47:44,782 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-10-27 19:47:44,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:44,785 INFO L225 Difference]: With dead ends: 361 [2020-10-27 19:47:44,785 INFO L226 Difference]: Without dead ends: 328 [2020-10-27 19:47:44,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:47:44,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-27 19:47:44,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 305. [2020-10-27 19:47:44,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-10-27 19:47:44,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 382 transitions. [2020-10-27 19:47:44,815 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 382 transitions. Word has length 43 [2020-10-27 19:47:44,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:44,815 INFO L481 AbstractCegarLoop]: Abstraction has 305 states and 382 transitions. [2020-10-27 19:47:44,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:47:44,816 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 382 transitions. [2020-10-27 19:47:44,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 19:47:44,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:44,817 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] [2020-10-27 19:47:44,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 19:47:44,817 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:44,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:44,818 INFO L82 PathProgramCache]: Analyzing trace with hash -389947496, now seen corresponding path program 5 times [2020-10-27 19:47:44,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:44,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331827898] [2020-10-27 19:47:44,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:44,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:44,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:45,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:45,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:46,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:49,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:49,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 19:47:49,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:47:49,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 19:47:49,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:49,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:47:49,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:49,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 19:47:49,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:50,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:50,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:50,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:50,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:50,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:50,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:50,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:50,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:50,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:50,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:50,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:50,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:50,245 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:50,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331827898] [2020-10-27 19:47:50,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:50,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:47:50,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287747839] [2020-10-27 19:47:50,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:47:50,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:50,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:47:50,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:47:50,247 INFO L87 Difference]: Start difference. First operand 305 states and 382 transitions. Second operand 12 states. [2020-10-27 19:47:51,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:51,446 INFO L93 Difference]: Finished difference Result 414 states and 505 transitions. [2020-10-27 19:47:51,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 19:47:51,447 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2020-10-27 19:47:51,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:51,449 INFO L225 Difference]: With dead ends: 414 [2020-10-27 19:47:51,450 INFO L226 Difference]: Without dead ends: 373 [2020-10-27 19:47:51,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2020-10-27 19:47:51,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-10-27 19:47:51,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 305. [2020-10-27 19:47:51,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-10-27 19:47:51,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 381 transitions. [2020-10-27 19:47:51,480 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 381 transitions. Word has length 44 [2020-10-27 19:47:51,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:51,481 INFO L481 AbstractCegarLoop]: Abstraction has 305 states and 381 transitions. [2020-10-27 19:47:51,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:47:51,481 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 381 transitions. [2020-10-27 19:47:51,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 19:47:51,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:51,483 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:51,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 19:47:51,483 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:51,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:51,483 INFO L82 PathProgramCache]: Analyzing trace with hash 521549919, now seen corresponding path program 2 times [2020-10-27 19:47:51,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:51,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905272821] [2020-10-27 19:47:51,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:51,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:51,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:51,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:51,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:51,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:52,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:52,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:52,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:52,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:53,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:53,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:56,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:56,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 19:47:56,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 19:47:56,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 19:47:56,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:56,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:47:56,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:56,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 19:47:56,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:56,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:56,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:56,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:56,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:56,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:56,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:56,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:56,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:56,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:56,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:56,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:56,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:56,899 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:56,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905272821] [2020-10-27 19:47:56,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:56,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:47:56,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141355120] [2020-10-27 19:47:56,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:47:56,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:56,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:47:56,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:47:56,901 INFO L87 Difference]: Start difference. First operand 305 states and 381 transitions. Second operand 13 states. [2020-10-27 19:47:58,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:58,042 INFO L93 Difference]: Finished difference Result 390 states and 476 transitions. [2020-10-27 19:47:58,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 19:47:58,043 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2020-10-27 19:47:58,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:58,045 INFO L225 Difference]: With dead ends: 390 [2020-10-27 19:47:58,046 INFO L226 Difference]: Without dead ends: 352 [2020-10-27 19:47:58,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2020-10-27 19:47:58,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-10-27 19:47:58,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 316. [2020-10-27 19:47:58,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-10-27 19:47:58,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 392 transitions. [2020-10-27 19:47:58,078 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 392 transitions. Word has length 45 [2020-10-27 19:47:58,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:58,078 INFO L481 AbstractCegarLoop]: Abstraction has 316 states and 392 transitions. [2020-10-27 19:47:58,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:47:58,078 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 392 transitions. [2020-10-27 19:47:58,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 19:47:58,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:58,079 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:58,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 19:47:58,080 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:58,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:58,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1472594787, now seen corresponding path program 1 times [2020-10-27 19:47:58,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:58,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826370257] [2020-10-27 19:47:58,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:58,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:58,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:58,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:58,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:59,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:03,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:03,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 19:48:03,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:48:03,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-27 19:48:03,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:03,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:48:03,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:03,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 19:48:03,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:03,712 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 33 [2020-10-27 19:48:03,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:03,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:03,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:03,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:03,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:03,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:03,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 19:48:03,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:03,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:03,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:03,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:03,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:03,817 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:03,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826370257] [2020-10-27 19:48:03,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:03,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:48:03,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595157761] [2020-10-27 19:48:03,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:48:03,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:03,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:48:03,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:48:03,818 INFO L87 Difference]: Start difference. First operand 316 states and 392 transitions. Second operand 12 states. [2020-10-27 19:48:05,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:05,044 INFO L93 Difference]: Finished difference Result 424 states and 511 transitions. [2020-10-27 19:48:05,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 19:48:05,045 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-10-27 19:48:05,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:05,047 INFO L225 Difference]: With dead ends: 424 [2020-10-27 19:48:05,048 INFO L226 Difference]: Without dead ends: 394 [2020-10-27 19:48:05,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-27 19:48:05,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-10-27 19:48:05,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 305. [2020-10-27 19:48:05,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-10-27 19:48:05,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 379 transitions. [2020-10-27 19:48:05,074 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 379 transitions. Word has length 45 [2020-10-27 19:48:05,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:05,075 INFO L481 AbstractCegarLoop]: Abstraction has 305 states and 379 transitions. [2020-10-27 19:48:05,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:48:05,075 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 379 transitions. [2020-10-27 19:48:05,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 19:48:05,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:05,076 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] [2020-10-27 19:48:05,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 19:48:05,076 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:05,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:05,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1753799446, now seen corresponding path program 6 times [2020-10-27 19:48:05,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:05,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648655008] [2020-10-27 19:48:05,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:05,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:05,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:05,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:06,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:06,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 19:48:06,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:48:06,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1675 [2020-10-27 19:48:06,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:06,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 19:48:06,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:06,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 19:48:06,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:07,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:07,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:07,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:07,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:07,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:07,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:07,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:48:07,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:07,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:07,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:07,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:07,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:07,212 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:07,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648655008] [2020-10-27 19:48:07,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:07,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 19:48:07,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281756234] [2020-10-27 19:48:07,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 19:48:07,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:07,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 19:48:07,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:48:07,214 INFO L87 Difference]: Start difference. First operand 305 states and 379 transitions. Second operand 15 states. [2020-10-27 19:48:09,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:09,098 INFO L93 Difference]: Finished difference Result 412 states and 504 transitions. [2020-10-27 19:48:09,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 19:48:09,099 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2020-10-27 19:48:09,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:09,101 INFO L225 Difference]: With dead ends: 412 [2020-10-27 19:48:09,101 INFO L226 Difference]: Without dead ends: 408 [2020-10-27 19:48:09,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2020-10-27 19:48:09,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2020-10-27 19:48:09,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 306. [2020-10-27 19:48:09,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-10-27 19:48:09,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 381 transitions. [2020-10-27 19:48:09,135 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 381 transitions. Word has length 45 [2020-10-27 19:48:09,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:09,135 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 381 transitions. [2020-10-27 19:48:09,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 19:48:09,136 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 381 transitions. [2020-10-27 19:48:09,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 19:48:09,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:09,137 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] [2020-10-27 19:48:09,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 19:48:09,137 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:09,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:09,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1462064490, now seen corresponding path program 7 times [2020-10-27 19:48:09,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:09,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816093922] [2020-10-27 19:48:09,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:09,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:09,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:10,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:10,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 19:48:10,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:10,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1043 [2020-10-27 19:48:10,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:10,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:48:10,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:10,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 19:48:10,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:10,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:10,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:10,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:10,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:10,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:10,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:10,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:10,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:10,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:10,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:10,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:10,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:10,685 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:10,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816093922] [2020-10-27 19:48:10,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:10,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:48:10,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79802754] [2020-10-27 19:48:10,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:48:10,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:10,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:48:10,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:48:10,686 INFO L87 Difference]: Start difference. First operand 306 states and 381 transitions. Second operand 14 states. [2020-10-27 19:48:12,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:12,049 INFO L93 Difference]: Finished difference Result 430 states and 527 transitions. [2020-10-27 19:48:12,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 19:48:12,049 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2020-10-27 19:48:12,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:12,052 INFO L225 Difference]: With dead ends: 430 [2020-10-27 19:48:12,052 INFO L226 Difference]: Without dead ends: 389 [2020-10-27 19:48:12,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2020-10-27 19:48:12,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-10-27 19:48:12,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 325. [2020-10-27 19:48:12,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-10-27 19:48:12,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 405 transitions. [2020-10-27 19:48:12,089 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 405 transitions. Word has length 45 [2020-10-27 19:48:12,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:12,092 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 405 transitions. [2020-10-27 19:48:12,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:48:12,092 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 405 transitions. [2020-10-27 19:48:12,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 19:48:12,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:12,093 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] [2020-10-27 19:48:12,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 19:48:12,093 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:12,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:12,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1724856960, now seen corresponding path program 2 times [2020-10-27 19:48:12,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:12,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830719739] [2020-10-27 19:48:12,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:12,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:12,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:13,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:13,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 19:48:13,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:13,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 897 [2020-10-27 19:48:13,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:13,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:48:13,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:13,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 19:48:13,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:13,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:13,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:13,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:13,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:13,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:13,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:13,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:13,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:13,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:13,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:13,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:13,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:13,332 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:13,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830719739] [2020-10-27 19:48:13,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:13,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:48:13,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571127692] [2020-10-27 19:48:13,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:48:13,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:13,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:48:13,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:48:13,334 INFO L87 Difference]: Start difference. First operand 325 states and 405 transitions. Second operand 13 states. [2020-10-27 19:48:14,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:14,139 INFO L93 Difference]: Finished difference Result 377 states and 461 transitions. [2020-10-27 19:48:14,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 19:48:14,141 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-10-27 19:48:14,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:14,143 INFO L225 Difference]: With dead ends: 377 [2020-10-27 19:48:14,144 INFO L226 Difference]: Without dead ends: 353 [2020-10-27 19:48:14,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-10-27 19:48:14,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-10-27 19:48:14,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 323. [2020-10-27 19:48:14,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-10-27 19:48:14,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 403 transitions. [2020-10-27 19:48:14,178 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 403 transitions. Word has length 46 [2020-10-27 19:48:14,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:14,178 INFO L481 AbstractCegarLoop]: Abstraction has 323 states and 403 transitions. [2020-10-27 19:48:14,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:48:14,178 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 403 transitions. [2020-10-27 19:48:14,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 19:48:14,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:14,179 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] [2020-10-27 19:48:14,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 19:48:14,180 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:14,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:14,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1593562062, now seen corresponding path program 1 times [2020-10-27 19:48:14,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:14,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652893176] [2020-10-27 19:48:14,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:14,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:14,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:14,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:14,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 19:48:14,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:14,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 592 [2020-10-27 19:48:14,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:14,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:48:14,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:14,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 19:48:14,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:15,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:15,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:15,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:15,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:15,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:15,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:15,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:15,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:15,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:15,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:15,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:15,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:15,193 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:15,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652893176] [2020-10-27 19:48:15,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:15,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:48:15,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625227251] [2020-10-27 19:48:15,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:48:15,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:15,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:48:15,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:48:15,195 INFO L87 Difference]: Start difference. First operand 323 states and 403 transitions. Second operand 14 states. [2020-10-27 19:48:16,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:16,743 INFO L93 Difference]: Finished difference Result 393 states and 480 transitions. [2020-10-27 19:48:16,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 19:48:16,743 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2020-10-27 19:48:16,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:16,746 INFO L225 Difference]: With dead ends: 393 [2020-10-27 19:48:16,746 INFO L226 Difference]: Without dead ends: 389 [2020-10-27 19:48:16,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:48:16,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-10-27 19:48:16,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 328. [2020-10-27 19:48:16,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-10-27 19:48:16,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 409 transitions. [2020-10-27 19:48:16,775 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 409 transitions. Word has length 46 [2020-10-27 19:48:16,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:16,777 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 409 transitions. [2020-10-27 19:48:16,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:48:16,777 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 409 transitions. [2020-10-27 19:48:16,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 19:48:16,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:16,778 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] [2020-10-27 19:48:16,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 19:48:16,779 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:16,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:16,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1200535052, now seen corresponding path program 1 times [2020-10-27 19:48:16,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:16,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856836588] [2020-10-27 19:48:16,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:16,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:16,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:17,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:17,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 19:48:17,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:17,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 792 [2020-10-27 19:48:17,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:17,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:48:17,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:17,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 19:48:17,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:17,938 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 27 [2020-10-27 19:48:17,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:17,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:17,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:17,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:17,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:17,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:17,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 19:48:17,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:17,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:17,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:17,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:17,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:17,989 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:17,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856836588] [2020-10-27 19:48:17,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:17,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:48:17,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808369583] [2020-10-27 19:48:17,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:48:17,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:17,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:48:17,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:48:17,991 INFO L87 Difference]: Start difference. First operand 328 states and 409 transitions. Second operand 11 states. [2020-10-27 19:48:19,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:19,208 INFO L93 Difference]: Finished difference Result 377 states and 460 transitions. [2020-10-27 19:48:19,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:48:19,208 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2020-10-27 19:48:19,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:19,210 INFO L225 Difference]: With dead ends: 377 [2020-10-27 19:48:19,211 INFO L226 Difference]: Without dead ends: 352 [2020-10-27 19:48:19,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2020-10-27 19:48:19,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-10-27 19:48:19,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 328. [2020-10-27 19:48:19,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-10-27 19:48:19,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 408 transitions. [2020-10-27 19:48:19,247 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 408 transitions. Word has length 46 [2020-10-27 19:48:19,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:19,247 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 408 transitions. [2020-10-27 19:48:19,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:48:19,247 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 408 transitions. [2020-10-27 19:48:19,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 19:48:19,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:19,249 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] [2020-10-27 19:48:19,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 19:48:19,249 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:19,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:19,249 INFO L82 PathProgramCache]: Analyzing trace with hash -937662642, now seen corresponding path program 8 times [2020-10-27 19:48:19,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:19,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185439345] [2020-10-27 19:48:19,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:19,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:19,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:20,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:20,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 19:48:20,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:20,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1433 [2020-10-27 19:48:20,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:20,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 19:48:20,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:20,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 19:48:20,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:21,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:21,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:21,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:21,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:21,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:21,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:21,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:21,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:21,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:21,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:21,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:21,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:21,433 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:21,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185439345] [2020-10-27 19:48:21,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:21,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 19:48:21,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778351411] [2020-10-27 19:48:21,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 19:48:21,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:21,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 19:48:21,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:48:21,435 INFO L87 Difference]: Start difference. First operand 328 states and 408 transitions. Second operand 15 states. [2020-10-27 19:48:22,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:22,923 INFO L93 Difference]: Finished difference Result 396 states and 491 transitions. [2020-10-27 19:48:22,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 19:48:22,923 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 46 [2020-10-27 19:48:22,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:22,926 INFO L225 Difference]: With dead ends: 396 [2020-10-27 19:48:22,926 INFO L226 Difference]: Without dead ends: 392 [2020-10-27 19:48:22,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2020-10-27 19:48:22,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2020-10-27 19:48:22,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 328. [2020-10-27 19:48:22,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-10-27 19:48:22,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 408 transitions. [2020-10-27 19:48:22,966 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 408 transitions. Word has length 46 [2020-10-27 19:48:22,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:22,966 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 408 transitions. [2020-10-27 19:48:22,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 19:48:22,966 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 408 transitions. [2020-10-27 19:48:22,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 19:48:22,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:22,967 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] [2020-10-27 19:48:22,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 19:48:22,968 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:22,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:22,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1730001579, now seen corresponding path program 1 times [2020-10-27 19:48:22,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:22,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166518454] [2020-10-27 19:48:22,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:23,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:23,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:23,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:23,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:24,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:28,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:28,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 19:48:28,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:48:28,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 19:48:28,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:28,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:48:28,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:28,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 19:48:28,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:28,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:28,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:28,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:28,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:28,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:28,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:28,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:28,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:28,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:28,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:28,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:28,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:28,481 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 19:48:28,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166518454] [2020-10-27 19:48:28,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:28,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:48:28,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27208343] [2020-10-27 19:48:28,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:48:28,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:28,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:48:28,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:48:28,482 INFO L87 Difference]: Start difference. First operand 328 states and 408 transitions. Second operand 14 states. [2020-10-27 19:48:29,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:29,544 INFO L93 Difference]: Finished difference Result 403 states and 500 transitions. [2020-10-27 19:48:29,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 19:48:29,545 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2020-10-27 19:48:29,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:29,548 INFO L225 Difference]: With dead ends: 403 [2020-10-27 19:48:29,548 INFO L226 Difference]: Without dead ends: 399 [2020-10-27 19:48:29,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2020-10-27 19:48:29,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2020-10-27 19:48:29,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 339. [2020-10-27 19:48:29,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-10-27 19:48:29,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 425 transitions. [2020-10-27 19:48:29,586 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 425 transitions. Word has length 47 [2020-10-27 19:48:29,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:29,586 INFO L481 AbstractCegarLoop]: Abstraction has 339 states and 425 transitions. [2020-10-27 19:48:29,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:48:29,587 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 425 transitions. [2020-10-27 19:48:29,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 19:48:29,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:29,588 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] [2020-10-27 19:48:29,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 19:48:29,588 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:29,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:29,588 INFO L82 PathProgramCache]: Analyzing trace with hash -2123028589, now seen corresponding path program 1 times [2020-10-27 19:48:29,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:29,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895317587] [2020-10-27 19:48:29,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:29,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:29,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:30,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:31,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:31,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 19:48:31,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:48:31,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2069 [2020-10-27 19:48:31,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:31,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:48:31,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:31,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 19:48:31,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:32,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:32,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:32,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:32,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:32,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:32,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:32,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:32,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:32,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:32,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:32,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:32,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:32,192 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:32,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895317587] [2020-10-27 19:48:32,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:32,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:48:32,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952981353] [2020-10-27 19:48:32,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:48:32,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:32,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:48:32,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:48:32,193 INFO L87 Difference]: Start difference. First operand 339 states and 425 transitions. Second operand 12 states. [2020-10-27 19:48:33,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:33,127 INFO L93 Difference]: Finished difference Result 464 states and 573 transitions. [2020-10-27 19:48:33,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 19:48:33,127 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-27 19:48:33,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:33,130 INFO L225 Difference]: With dead ends: 464 [2020-10-27 19:48:33,130 INFO L226 Difference]: Without dead ends: 397 [2020-10-27 19:48:33,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:48:33,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-10-27 19:48:33,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 339. [2020-10-27 19:48:33,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-10-27 19:48:33,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 424 transitions. [2020-10-27 19:48:33,171 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 424 transitions. Word has length 47 [2020-10-27 19:48:33,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:33,172 INFO L481 AbstractCegarLoop]: Abstraction has 339 states and 424 transitions. [2020-10-27 19:48:33,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:48:33,172 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 424 transitions. [2020-10-27 19:48:33,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 19:48:33,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:33,173 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] [2020-10-27 19:48:33,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 19:48:33,173 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:33,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:33,174 INFO L82 PathProgramCache]: Analyzing trace with hash -916050093, now seen corresponding path program 2 times [2020-10-27 19:48:33,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:33,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000843806] [2020-10-27 19:48:33,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:33,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:33,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:34,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:34,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 19:48:34,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:34,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1543 [2020-10-27 19:48:34,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:34,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 19:48:34,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:34,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 19:48:34,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:35,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:35,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:35,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:35,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:35,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:35,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:35,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:35,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:35,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:35,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:35,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:35,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:35,391 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:35,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000843806] [2020-10-27 19:48:35,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:35,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 19:48:35,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971756870] [2020-10-27 19:48:35,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 19:48:35,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:35,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 19:48:35,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:48:35,393 INFO L87 Difference]: Start difference. First operand 339 states and 424 transitions. Second operand 15 states. [2020-10-27 19:48:38,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:38,093 INFO L93 Difference]: Finished difference Result 492 states and 603 transitions. [2020-10-27 19:48:38,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 19:48:38,094 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2020-10-27 19:48:38,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:38,097 INFO L225 Difference]: With dead ends: 492 [2020-10-27 19:48:38,097 INFO L226 Difference]: Without dead ends: 488 [2020-10-27 19:48:38,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-10-27 19:48:38,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2020-10-27 19:48:38,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 366. [2020-10-27 19:48:38,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 366 states. [2020-10-27 19:48:38,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 458 transitions. [2020-10-27 19:48:38,139 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 458 transitions. Word has length 47 [2020-10-27 19:48:38,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:38,139 INFO L481 AbstractCegarLoop]: Abstraction has 366 states and 458 transitions. [2020-10-27 19:48:38,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 19:48:38,139 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 458 transitions. [2020-10-27 19:48:38,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 19:48:38,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:38,140 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] [2020-10-27 19:48:38,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 19:48:38,141 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:38,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:38,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1711039884, now seen corresponding path program 1 times [2020-10-27 19:48:38,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:38,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294861157] [2020-10-27 19:48:38,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:38,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:38,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:39,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:39,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 19:48:39,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:39,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 976 [2020-10-27 19:48:39,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:39,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:48:39,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:39,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 19:48:39,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:39,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:39,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:39,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:39,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:39,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:39,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:39,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:48:39,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:39,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:39,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:39,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:39,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:39,547 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:39,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294861157] [2020-10-27 19:48:39,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:39,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:48:39,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290188169] [2020-10-27 19:48:39,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:48:39,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:39,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:48:39,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:48:39,549 INFO L87 Difference]: Start difference. First operand 366 states and 458 transitions. Second operand 13 states. [2020-10-27 19:48:41,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:41,449 INFO L93 Difference]: Finished difference Result 453 states and 555 transitions. [2020-10-27 19:48:41,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 19:48:41,449 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2020-10-27 19:48:41,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:41,452 INFO L225 Difference]: With dead ends: 453 [2020-10-27 19:48:41,452 INFO L226 Difference]: Without dead ends: 412 [2020-10-27 19:48:41,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2020-10-27 19:48:41,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2020-10-27 19:48:41,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 370. [2020-10-27 19:48:41,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 370 states. [2020-10-27 19:48:41,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 463 transitions. [2020-10-27 19:48:41,493 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 463 transitions. Word has length 47 [2020-10-27 19:48:41,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:41,494 INFO L481 AbstractCegarLoop]: Abstraction has 370 states and 463 transitions. [2020-10-27 19:48:41,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:48:41,494 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 463 transitions. [2020-10-27 19:48:41,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 19:48:41,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:41,495 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] [2020-10-27 19:48:41,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 19:48:41,495 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:41,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:41,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1210993914, now seen corresponding path program 1 times [2020-10-27 19:48:41,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:41,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186042293] [2020-10-27 19:48:41,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:41,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:41,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:41,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:41,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 19:48:41,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:41,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 402 [2020-10-27 19:48:41,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:41,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:48:41,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:41,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 19:48:41,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:42,326 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2020-10-27 19:48:42,476 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2020-10-27 19:48:42,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:42,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:42,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:42,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:42,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:42,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:42,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:42,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:42,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:42,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:42,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:42,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:42,645 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:42,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186042293] [2020-10-27 19:48:42,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:42,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:48:42,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357480866] [2020-10-27 19:48:42,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:48:42,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:42,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:48:42,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:48:42,647 INFO L87 Difference]: Start difference. First operand 370 states and 463 transitions. Second operand 13 states. [2020-10-27 19:48:43,497 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2020-10-27 19:48:43,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:43,875 INFO L93 Difference]: Finished difference Result 434 states and 531 transitions. [2020-10-27 19:48:43,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:48:43,876 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 48 [2020-10-27 19:48:43,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:43,879 INFO L225 Difference]: With dead ends: 434 [2020-10-27 19:48:43,879 INFO L226 Difference]: Without dead ends: 410 [2020-10-27 19:48:43,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:48:43,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-10-27 19:48:43,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 370. [2020-10-27 19:48:43,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 370 states. [2020-10-27 19:48:43,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 463 transitions. [2020-10-27 19:48:43,912 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 463 transitions. Word has length 48 [2020-10-27 19:48:43,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:43,912 INFO L481 AbstractCegarLoop]: Abstraction has 370 states and 463 transitions. [2020-10-27 19:48:43,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:48:43,912 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 463 transitions. [2020-10-27 19:48:43,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 19:48:43,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:43,913 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] [2020-10-27 19:48:43,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 19:48:43,914 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:43,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:43,914 INFO L82 PathProgramCache]: Analyzing trace with hash 73762430, now seen corresponding path program 1 times [2020-10-27 19:48:43,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:43,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342482353] [2020-10-27 19:48:43,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:44,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:44,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:44,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:44,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:49,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:49,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 19:48:49,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:48:49,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 19:48:49,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:49,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:48:49,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:49,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 19:48:49,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:49,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:49,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:49,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:49,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:49,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:49,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:49,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:49,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:49,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:49,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:49,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:49,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:49,616 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:49,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342482353] [2020-10-27 19:48:49,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:49,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:48:49,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655144939] [2020-10-27 19:48:49,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:48:49,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:49,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:48:49,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:48:49,618 INFO L87 Difference]: Start difference. First operand 370 states and 463 transitions. Second operand 13 states. [2020-10-27 19:48:51,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:51,298 INFO L93 Difference]: Finished difference Result 438 states and 537 transitions. [2020-10-27 19:48:51,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 19:48:51,299 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 48 [2020-10-27 19:48:51,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:51,303 INFO L225 Difference]: With dead ends: 438 [2020-10-27 19:48:51,303 INFO L226 Difference]: Without dead ends: 422 [2020-10-27 19:48:51,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2020-10-27 19:48:51,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-10-27 19:48:51,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 376. [2020-10-27 19:48:51,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2020-10-27 19:48:51,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 470 transitions. [2020-10-27 19:48:51,341 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 470 transitions. Word has length 48 [2020-10-27 19:48:51,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:51,342 INFO L481 AbstractCegarLoop]: Abstraction has 376 states and 470 transitions. [2020-10-27 19:48:51,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:48:51,342 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 470 transitions. [2020-10-27 19:48:51,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 19:48:51,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:51,343 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] [2020-10-27 19:48:51,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 19:48:51,344 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:51,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:51,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1875823011, now seen corresponding path program 9 times [2020-10-27 19:48:51,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:51,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350597486] [2020-10-27 19:48:51,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:51,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:51,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:52,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:52,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:54,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:54,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 19:48:54,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:48:54,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3303 [2020-10-27 19:48:54,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:54,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 19:48:54,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:54,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 19:48:54,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:55,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:55,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:55,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:55,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:55,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:55,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:55,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:48:55,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:55,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:55,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:55,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:55,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:55,133 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:55,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350597486] [2020-10-27 19:48:55,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:55,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 19:48:55,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824508141] [2020-10-27 19:48:55,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 19:48:55,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:55,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 19:48:55,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:48:55,134 INFO L87 Difference]: Start difference. First operand 376 states and 470 transitions. Second operand 15 states. [2020-10-27 19:48:57,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:57,237 INFO L93 Difference]: Finished difference Result 479 states and 596 transitions. [2020-10-27 19:48:57,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 19:48:57,238 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 48 [2020-10-27 19:48:57,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:57,241 INFO L225 Difference]: With dead ends: 479 [2020-10-27 19:48:57,241 INFO L226 Difference]: Without dead ends: 475 [2020-10-27 19:48:57,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2020-10-27 19:48:57,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2020-10-27 19:48:57,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 389. [2020-10-27 19:48:57,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2020-10-27 19:48:57,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 489 transitions. [2020-10-27 19:48:57,282 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 489 transitions. Word has length 48 [2020-10-27 19:48:57,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:57,282 INFO L481 AbstractCegarLoop]: Abstraction has 389 states and 489 transitions. [2020-10-27 19:48:57,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 19:48:57,282 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 489 transitions. [2020-10-27 19:48:57,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 19:48:57,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:57,283 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] [2020-10-27 19:48:57,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 19:48:57,284 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:57,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:57,284 INFO L82 PathProgramCache]: Analyzing trace with hash 656520253, now seen corresponding path program 1 times [2020-10-27 19:48:57,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:57,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044633148] [2020-10-27 19:48:57,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:57,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:57,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:57,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:57,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:58,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:58,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:01,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:02,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:02,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:02,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 19:49:02,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 19:49:02,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-27 19:49:02,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:02,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:49:02,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:02,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 19:49:02,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:02,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:02,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:02,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:02,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:02,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:02,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:02,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:49:02,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:02,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:02,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:02,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:02,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:02,949 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 19:49:02,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044633148] [2020-10-27 19:49:02,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:02,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 19:49:02,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56238591] [2020-10-27 19:49:02,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 19:49:02,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:02,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 19:49:02,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:49:02,950 INFO L87 Difference]: Start difference. First operand 389 states and 489 transitions. Second operand 15 states. [2020-10-27 19:49:04,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:04,799 INFO L93 Difference]: Finished difference Result 498 states and 608 transitions. [2020-10-27 19:49:04,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 19:49:04,799 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2020-10-27 19:49:04,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:04,802 INFO L225 Difference]: With dead ends: 498 [2020-10-27 19:49:04,802 INFO L226 Difference]: Without dead ends: 470 [2020-10-27 19:49:04,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2020-10-27 19:49:04,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2020-10-27 19:49:04,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 407. [2020-10-27 19:49:04,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2020-10-27 19:49:04,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 510 transitions. [2020-10-27 19:49:04,837 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 510 transitions. Word has length 49 [2020-10-27 19:49:04,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:04,838 INFO L481 AbstractCegarLoop]: Abstraction has 407 states and 510 transitions. [2020-10-27 19:49:04,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 19:49:04,838 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 510 transitions. [2020-10-27 19:49:04,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 19:49:04,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:04,839 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] [2020-10-27 19:49:04,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-27 19:49:04,839 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:04,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:04,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1032423489, now seen corresponding path program 1 times [2020-10-27 19:49:04,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:04,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234092444] [2020-10-27 19:49:04,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:04,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:04,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:06,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:06,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 19:49:06,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:06,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1477 [2020-10-27 19:49:06,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:06,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:49:06,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:06,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 19:49:06,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:06,970 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 34 [2020-10-27 19:49:07,111 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 38 [2020-10-27 19:49:07,350 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 59 [2020-10-27 19:49:07,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:07,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:07,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:07,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:07,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:07,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:07,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 19:49:07,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:07,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:07,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:07,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:07,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:49:07,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234092444] [2020-10-27 19:49:07,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:07,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 19:49:07,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471588595] [2020-10-27 19:49:07,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 19:49:07,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:07,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 19:49:07,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:49:07,500 INFO L87 Difference]: Start difference. First operand 407 states and 510 transitions. Second operand 15 states. [2020-10-27 19:49:08,880 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 71 [2020-10-27 19:49:09,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:09,978 INFO L93 Difference]: Finished difference Result 623 states and 770 transitions. [2020-10-27 19:49:09,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 19:49:09,979 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2020-10-27 19:49:09,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:09,982 INFO L225 Difference]: With dead ends: 623 [2020-10-27 19:49:09,982 INFO L226 Difference]: Without dead ends: 619 [2020-10-27 19:49:09,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-27 19:49:09,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2020-10-27 19:49:10,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 484. [2020-10-27 19:49:10,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2020-10-27 19:49:10,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 613 transitions. [2020-10-27 19:49:10,072 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 613 transitions. Word has length 49 [2020-10-27 19:49:10,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:10,073 INFO L481 AbstractCegarLoop]: Abstraction has 484 states and 613 transitions. [2020-10-27 19:49:10,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 19:49:10,073 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 613 transitions. [2020-10-27 19:49:10,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 19:49:10,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:10,074 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 4, 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] [2020-10-27 19:49:10,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-27 19:49:10,074 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:10,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:10,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1021758869, now seen corresponding path program 10 times [2020-10-27 19:49:10,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:10,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886570005] [2020-10-27 19:49:10,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:10,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:10,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:11,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:13,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:13,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 19:49:13,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:49:13,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3256 [2020-10-27 19:49:13,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:13,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 19:49:13,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:13,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 19:49:13,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:14,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:14,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:14,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:14,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:14,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:14,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:14,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:49:14,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:14,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:14,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:14,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:14,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:14,038 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 19:49:14,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886570005] [2020-10-27 19:49:14,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:14,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:49:14,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320624410] [2020-10-27 19:49:14,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:49:14,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:14,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:49:14,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:49:14,039 INFO L87 Difference]: Start difference. First operand 484 states and 613 transitions. Second operand 13 states. [2020-10-27 19:49:15,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:15,276 INFO L93 Difference]: Finished difference Result 668 states and 839 transitions. [2020-10-27 19:49:15,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 19:49:15,276 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-10-27 19:49:15,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:15,279 INFO L225 Difference]: With dead ends: 668 [2020-10-27 19:49:15,279 INFO L226 Difference]: Without dead ends: 546 [2020-10-27 19:49:15,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-10-27 19:49:15,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-10-27 19:49:15,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 484. [2020-10-27 19:49:15,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2020-10-27 19:49:15,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 611 transitions. [2020-10-27 19:49:15,317 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 611 transitions. Word has length 49 [2020-10-27 19:49:15,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:15,317 INFO L481 AbstractCegarLoop]: Abstraction has 484 states and 611 transitions. [2020-10-27 19:49:15,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:49:15,317 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 611 transitions. [2020-10-27 19:49:15,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 19:49:15,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:15,318 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:49:15,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-27 19:49:15,318 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:15,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:15,318 INFO L82 PathProgramCache]: Analyzing trace with hash -756594133, now seen corresponding path program 11 times [2020-10-27 19:49:15,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:15,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617106729] [2020-10-27 19:49:15,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:15,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:15,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:17,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:17,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 19:49:17,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:17,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2180 [2020-10-27 19:49:17,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:17,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 19:49:17,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:17,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 19:49:17,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:17,858 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2020-10-27 19:49:18,058 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2020-10-27 19:49:18,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:18,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:18,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:18,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:18,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:18,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:18,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:49:18,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:18,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:18,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:18,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:18,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:18,541 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:49:18,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617106729] [2020-10-27 19:49:18,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:18,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 19:49:18,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293445722] [2020-10-27 19:49:18,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 19:49:18,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:18,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 19:49:18,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:49:18,543 INFO L87 Difference]: Start difference. First operand 484 states and 611 transitions. Second operand 16 states. [2020-10-27 19:49:20,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:20,843 INFO L93 Difference]: Finished difference Result 655 states and 828 transitions. [2020-10-27 19:49:20,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 19:49:20,844 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 49 [2020-10-27 19:49:20,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:20,847 INFO L225 Difference]: With dead ends: 655 [2020-10-27 19:49:20,847 INFO L226 Difference]: Without dead ends: 651 [2020-10-27 19:49:20,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:49:20,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2020-10-27 19:49:20,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 547. [2020-10-27 19:49:20,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 547 states. [2020-10-27 19:49:20,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 697 transitions. [2020-10-27 19:49:20,888 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 697 transitions. Word has length 49 [2020-10-27 19:49:20,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:20,889 INFO L481 AbstractCegarLoop]: Abstraction has 547 states and 697 transitions. [2020-10-27 19:49:20,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 19:49:20,889 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 697 transitions. [2020-10-27 19:49:20,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 19:49:20,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:20,890 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:49:20,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-27 19:49:20,890 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:20,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:20,890 INFO L82 PathProgramCache]: Analyzing trace with hash -554221077, now seen corresponding path program 12 times [2020-10-27 19:49:20,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:20,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201972073] [2020-10-27 19:49:20,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:21,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:21,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:22,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:22,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 19:49:22,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:22,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1785 [2020-10-27 19:49:22,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:22,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 19:49:22,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:22,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 19:49:22,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:23,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:23,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:23,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:23,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:23,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:23,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:23,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:49:23,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:23,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:23,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:23,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:23,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:23,426 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:49:23,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201972073] [2020-10-27 19:49:23,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:23,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 19:49:23,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812030575] [2020-10-27 19:49:23,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 19:49:23,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:23,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 19:49:23,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:49:23,428 INFO L87 Difference]: Start difference. First operand 547 states and 697 transitions. Second operand 15 states. [2020-10-27 19:49:25,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:25,072 INFO L93 Difference]: Finished difference Result 696 states and 877 transitions. [2020-10-27 19:49:25,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 19:49:25,072 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2020-10-27 19:49:25,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:25,076 INFO L225 Difference]: With dead ends: 696 [2020-10-27 19:49:25,076 INFO L226 Difference]: Without dead ends: 628 [2020-10-27 19:49:25,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-27 19:49:25,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2020-10-27 19:49:25,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 564. [2020-10-27 19:49:25,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 564 states. [2020-10-27 19:49:25,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 719 transitions. [2020-10-27 19:49:25,122 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 719 transitions. Word has length 49 [2020-10-27 19:49:25,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:25,122 INFO L481 AbstractCegarLoop]: Abstraction has 564 states and 719 transitions. [2020-10-27 19:49:25,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 19:49:25,122 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 719 transitions. [2020-10-27 19:49:25,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 19:49:25,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:25,124 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:49:25,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-27 19:49:25,124 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:25,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:25,124 INFO L82 PathProgramCache]: Analyzing trace with hash -769399948, now seen corresponding path program 1 times [2020-10-27 19:49:25,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:25,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213269726] [2020-10-27 19:49:25,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:25,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:25,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:25,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:25,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 19:49:25,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:25,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 512 [2020-10-27 19:49:25,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:25,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:49:25,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:25,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 19:49:25,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:25,907 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 49 [2020-10-27 19:49:26,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:26,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:26,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:26,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:26,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:26,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:26,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 19:49:26,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:26,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:26,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:26,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:26,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:26,033 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:49:26,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213269726] [2020-10-27 19:49:26,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:26,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:49:26,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222061637] [2020-10-27 19:49:26,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:49:26,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:26,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:49:26,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:49:26,034 INFO L87 Difference]: Start difference. First operand 564 states and 719 transitions. Second operand 13 states. [2020-10-27 19:49:26,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:26,856 INFO L93 Difference]: Finished difference Result 606 states and 762 transitions. [2020-10-27 19:49:26,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 19:49:26,856 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2020-10-27 19:49:26,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:26,860 INFO L225 Difference]: With dead ends: 606 [2020-10-27 19:49:26,860 INFO L226 Difference]: Without dead ends: 602 [2020-10-27 19:49:26,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-27 19:49:26,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2020-10-27 19:49:26,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 586. [2020-10-27 19:49:26,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 586 states. [2020-10-27 19:49:26,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 741 transitions. [2020-10-27 19:49:26,925 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 741 transitions. Word has length 50 [2020-10-27 19:49:26,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:26,925 INFO L481 AbstractCegarLoop]: Abstraction has 586 states and 741 transitions. [2020-10-27 19:49:26,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:49:26,925 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 741 transitions. [2020-10-27 19:49:26,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 19:49:26,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:26,926 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, 1, 1, 1, 1, 1, 1] [2020-10-27 19:49:26,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-27 19:49:26,927 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:26,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:26,927 INFO L82 PathProgramCache]: Analyzing trace with hash -839637656, now seen corresponding path program 3 times [2020-10-27 19:49:26,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:26,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052877571] [2020-10-27 19:49:26,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:27,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:27,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:29,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:29,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 19:49:29,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:29,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2343 [2020-10-27 19:49:29,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:29,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 19:49:29,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:29,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 19:49:29,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:29,895 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2020-10-27 19:49:30,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:30,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:30,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:30,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:30,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:30,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:30,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:49:30,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:30,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:30,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:30,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:30,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:30,282 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:49:30,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052877571] [2020-10-27 19:49:30,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:30,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 19:49:30,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529332469] [2020-10-27 19:49:30,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 19:49:30,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:30,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 19:49:30,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:49:30,284 INFO L87 Difference]: Start difference. First operand 586 states and 741 transitions. Second operand 16 states. [2020-10-27 19:49:31,554 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2020-10-27 19:49:31,999 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2020-10-27 19:49:34,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:34,062 INFO L93 Difference]: Finished difference Result 786 states and 975 transitions. [2020-10-27 19:49:34,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 19:49:34,063 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2020-10-27 19:49:34,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:34,068 INFO L225 Difference]: With dead ends: 786 [2020-10-27 19:49:34,068 INFO L226 Difference]: Without dead ends: 782 [2020-10-27 19:49:34,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=190, Invalid=1000, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 19:49:34,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2020-10-27 19:49:34,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 582. [2020-10-27 19:49:34,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 582 states. [2020-10-27 19:49:34,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 734 transitions. [2020-10-27 19:49:34,131 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 734 transitions. Word has length 51 [2020-10-27 19:49:34,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:34,131 INFO L481 AbstractCegarLoop]: Abstraction has 582 states and 734 transitions. [2020-10-27 19:49:34,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 19:49:34,131 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 734 transitions. [2020-10-27 19:49:34,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 19:49:34,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:34,132 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:49:34,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-27 19:49:34,132 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:34,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:34,133 INFO L82 PathProgramCache]: Analyzing trace with hash 662789046, now seen corresponding path program 13 times [2020-10-27 19:49:34,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:34,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708235841] [2020-10-27 19:49:34,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:34,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:34,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:34,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:35,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:35,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:39,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:39,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 19:49:39,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:49:39,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-27 19:49:39,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:39,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:49:39,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:39,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 19:49:39,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:39,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:39,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:39,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:39,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:39,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:39,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:39,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:49:39,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:39,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:39,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:39,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:39,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:39,611 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 18 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 19:49:39,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708235841] [2020-10-27 19:49:39,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:39,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:49:39,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781565067] [2020-10-27 19:49:39,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:49:39,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:39,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:49:39,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:49:39,613 INFO L87 Difference]: Start difference. First operand 582 states and 734 transitions. Second operand 14 states. [2020-10-27 19:49:41,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:41,111 INFO L93 Difference]: Finished difference Result 715 states and 892 transitions. [2020-10-27 19:49:41,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 19:49:41,112 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-10-27 19:49:41,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:41,116 INFO L225 Difference]: With dead ends: 715 [2020-10-27 19:49:41,116 INFO L226 Difference]: Without dead ends: 642 [2020-10-27 19:49:41,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2020-10-27 19:49:41,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2020-10-27 19:49:41,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 582. [2020-10-27 19:49:41,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 582 states. [2020-10-27 19:49:41,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 733 transitions. [2020-10-27 19:49:41,171 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 733 transitions. Word has length 51 [2020-10-27 19:49:41,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:41,171 INFO L481 AbstractCegarLoop]: Abstraction has 582 states and 733 transitions. [2020-10-27 19:49:41,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:49:41,171 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 733 transitions. [2020-10-27 19:49:41,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 19:49:41,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:41,172 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:49:41,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-27 19:49:41,173 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:41,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:41,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1869767542, now seen corresponding path program 14 times [2020-10-27 19:49:41,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:41,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314907599] [2020-10-27 19:49:41,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:41,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:41,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:41,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:42,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking...