/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/list-ext3-properties/dll_circular_traversal-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:40:32,076 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:40:32,079 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:40:32,127 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:40:32,128 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:40:32,129 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:40:32,131 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:40:32,134 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:40:32,136 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:40:32,137 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:40:32,139 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:40:32,141 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:40:32,141 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:40:32,143 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:40:32,144 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:40:32,146 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:40:32,147 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:40:32,148 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:40:32,151 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:40:32,153 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:40:32,155 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:40:32,157 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:40:32,159 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:40:32,160 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:40:32,181 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:40:32,182 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:40:32,182 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:40:32,184 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:40:32,184 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:40:32,189 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:40:32,189 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:40:32,190 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:40:32,194 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:40:32,195 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:40:32,198 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:40:32,199 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:40:32,200 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:40:32,200 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:40:32,201 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:40:32,202 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:40:32,204 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:40:32,205 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 14:40:32,260 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:40:32,261 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:40:32,266 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:40:32,266 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:40:32,266 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:40:32,267 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:40:32,267 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:40:32,267 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:40:32,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:40:32,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:40:32,269 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:40:32,269 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:40:32,269 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:40:32,270 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:40:32,270 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:40:32,270 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:40:32,270 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:40:32,271 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:40:32,271 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:40:32,271 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:40:32,272 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:40:32,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:40:32,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:40:32,272 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:40:32,273 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:40:32,273 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:40:32,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:40:32,273 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:40:32,273 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:40:32,274 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:40:32,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:40:32,687 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:40:32,690 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:40:32,692 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:40:32,693 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:40:32,694 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/dll_circular_traversal-2.i [2020-10-28 14:40:32,782 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c60fe2fce/c2aa51df86e64073a484deabbf8c39e1/FLAGe5098b167 [2020-10-28 14:40:33,494 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:40:33,495 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext3-properties/dll_circular_traversal-2.i [2020-10-28 14:40:33,515 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c60fe2fce/c2aa51df86e64073a484deabbf8c39e1/FLAGe5098b167 [2020-10-28 14:40:33,736 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c60fe2fce/c2aa51df86e64073a484deabbf8c39e1 [2020-10-28 14:40:33,743 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:40:33,751 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:40:33,755 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:40:33,756 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:40:33,761 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:40:33,762 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:40:33" (1/1) ... [2020-10-28 14:40:33,772 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@135faebe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:33, skipping insertion in model container [2020-10-28 14:40:33,773 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:40:33" (1/1) ... [2020-10-28 14:40:33,783 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:40:33,848 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:40:34,270 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:40:34,291 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:40:34,387 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:40:34,451 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:40:34,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:34 WrapperNode [2020-10-28 14:40:34,452 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:40:34,454 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:40:34,454 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:40:34,454 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:40:34,468 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:34" (1/1) ... [2020-10-28 14:40:34,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:34" (1/1) ... [2020-10-28 14:40:34,484 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:34" (1/1) ... [2020-10-28 14:40:34,484 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:34" (1/1) ... [2020-10-28 14:40:34,500 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:34" (1/1) ... [2020-10-28 14:40:34,508 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:34" (1/1) ... [2020-10-28 14:40:34,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:34" (1/1) ... [2020-10-28 14:40:34,540 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:40:34,545 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:40:34,545 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:40:34,545 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:40:34,546 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:34" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:40:34,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:40:34,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:40:34,628 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:40:34,628 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-28 14:40:34,628 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-28 14:40:34,629 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-28 14:40:34,629 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_create [2020-10-28 14:40:34,629 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:40:34,629 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:40:34,629 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:40:34,629 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 14:40:34,630 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 14:40:34,630 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:40:34,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:40:34,630 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-28 14:40:34,630 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-28 14:40:34,631 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-28 14:40:34,631 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-28 14:40:34,631 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-28 14:40:34,631 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-28 14:40:34,631 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-28 14:40:34,631 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-28 14:40:34,631 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-28 14:40:34,632 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-28 14:40:34,632 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-28 14:40:34,632 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-28 14:40:34,632 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-28 14:40:34,632 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-28 14:40:34,632 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-28 14:40:34,632 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-28 14:40:34,633 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-28 14:40:34,633 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-28 14:40:34,633 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-28 14:40:34,633 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-28 14:40:34,633 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-28 14:40:34,633 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-28 14:40:34,633 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-28 14:40:34,634 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-28 14:40:34,634 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-28 14:40:34,634 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-28 14:40:34,634 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-28 14:40:34,634 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-28 14:40:34,634 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-28 14:40:34,634 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-28 14:40:34,635 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-28 14:40:34,635 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-28 14:40:34,635 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-28 14:40:34,635 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-28 14:40:34,635 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-28 14:40:34,635 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-28 14:40:34,636 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-28 14:40:34,636 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-28 14:40:34,636 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-28 14:40:34,636 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-28 14:40:34,636 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-28 14:40:34,636 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-28 14:40:34,637 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-28 14:40:34,637 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-28 14:40:34,637 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-28 14:40:34,637 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-28 14:40:34,637 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-28 14:40:34,637 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-28 14:40:34,637 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-28 14:40:34,638 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-28 14:40:34,638 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-28 14:40:34,638 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-28 14:40:34,638 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 14:40:34,638 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-28 14:40:34,638 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-28 14:40:34,639 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-28 14:40:34,639 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-28 14:40:34,639 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-28 14:40:34,639 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-28 14:40:34,639 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-28 14:40:34,639 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-28 14:40:34,639 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-28 14:40:34,640 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-28 14:40:34,640 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-28 14:40:34,640 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:40:34,640 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-28 14:40:34,640 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-28 14:40:34,640 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-28 14:40:34,641 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-28 14:40:34,641 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-28 14:40:34,641 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-28 14:40:34,641 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-28 14:40:34,641 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-28 14:40:34,641 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-28 14:40:34,641 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-28 14:40:34,642 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-28 14:40:34,642 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-28 14:40:34,642 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-28 14:40:34,642 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-28 14:40:34,642 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-28 14:40:34,642 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-28 14:40:34,642 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-28 14:40:34,643 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-28 14:40:34,643 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-28 14:40:34,643 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-28 14:40:34,643 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-28 14:40:34,643 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-28 14:40:34,643 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-28 14:40:34,643 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-28 14:40:34,644 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-28 14:40:34,644 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-28 14:40:34,644 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-28 14:40:34,644 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-28 14:40:34,644 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-28 14:40:34,644 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-28 14:40:34,644 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-28 14:40:34,644 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-28 14:40:34,645 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-28 14:40:34,645 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-28 14:40:34,645 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-28 14:40:34,645 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-28 14:40:34,645 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-28 14:40:34,645 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-28 14:40:34,645 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-28 14:40:34,646 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-28 14:40:34,646 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_create [2020-10-28 14:40:34,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 14:40:34,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-28 14:40:34,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:40:34,646 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:40:34,646 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:40:34,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-28 14:40:34,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:40:34,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:40:34,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:40:34,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:40:35,126 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-28 14:40:35,204 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:40:35,205 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-28 14:40:35,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:40:35 BoogieIcfgContainer [2020-10-28 14:40:35,207 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:40:35,209 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:40:35,209 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:40:35,212 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:40:35,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:40:33" (1/3) ... [2020-10-28 14:40:35,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a895140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:40:35, skipping insertion in model container [2020-10-28 14:40:35,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:40:34" (2/3) ... [2020-10-28 14:40:35,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a895140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:40:35, skipping insertion in model container [2020-10-28 14:40:35,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:40:35" (3/3) ... [2020-10-28 14:40:35,216 INFO L111 eAbstractionObserver]: Analyzing ICFG dll_circular_traversal-2.i [2020-10-28 14:40:35,228 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:40:35,234 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:40:35,248 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:40:35,276 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:40:35,277 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:40:35,277 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:40:35,277 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:40:35,277 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:40:35,277 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:40:35,277 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:40:35,278 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:40:35,296 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-28 14:40:35,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 14:40:35,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:35,303 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:35,304 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:35,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:35,310 INFO L82 PathProgramCache]: Analyzing trace with hash 820974528, now seen corresponding path program 1 times [2020-10-28 14:40:35,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:35,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937805067] [2020-10-28 14:40:35,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:35,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:35,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:35,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:36,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:36,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 14:40:36,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:40:36,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 808 [2020-10-28 14:40:36,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:36,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:36,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:36,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:40:36,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:36,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:40:36,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:36,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:36,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:36,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:36,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:36,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:36,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:40:36,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:36,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:36,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:36,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:36,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:36,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:36,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:40:36,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:36,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:36,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:36,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-28 14:40:36,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:36,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 14:40:36,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:36,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:36,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:36,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:40:36,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:36,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:36,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:40:36,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937805067] [2020-10-28 14:40:36,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:40:36,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:40:36,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933053779] [2020-10-28 14:40:36,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:40:36,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:36,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:40:36,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:40:36,455 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 4 states. [2020-10-28 14:40:36,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:36,628 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2020-10-28 14:40:36,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:40:36,630 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-28 14:40:36,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:36,638 INFO L225 Difference]: With dead ends: 60 [2020-10-28 14:40:36,639 INFO L226 Difference]: Without dead ends: 28 [2020-10-28 14:40:36,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:40:36,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-28 14:40:36,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-28 14:40:36,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 14:40:36,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-10-28 14:40:36,686 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 20 [2020-10-28 14:40:36,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:36,686 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-10-28 14:40:36,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:40:36,686 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-10-28 14:40:36,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 14:40:36,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:36,688 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:36,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:40:36,688 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:36,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:36,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1115830708, now seen corresponding path program 1 times [2020-10-28 14:40:36,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:36,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084021851] [2020-10-28 14:40:36,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:36,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:36,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:36,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:37,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:37,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 14:40:37,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:40:37,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 616 [2020-10-28 14:40:37,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:37,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:37,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:40:37,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:40:37,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:40:37,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:37,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:37,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:37,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:37,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:37,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:37,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:37,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 14:40:37,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:37,436 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:37,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:37,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:37,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:37,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:40:37,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:40:37,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:37,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:37,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:37,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-28 14:40:37,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:37,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-28 14:40:37,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:37,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:37,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:40:37,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:40:37,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 14:40:37,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:37,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:40:37,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084021851] [2020-10-28 14:40:37,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:40:37,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 14:40:37,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77605302] [2020-10-28 14:40:37,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:40:37,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:37,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:40:37,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:40:37,587 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 7 states. [2020-10-28 14:40:37,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:37,816 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2020-10-28 14:40:37,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:40:37,817 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-28 14:40:37,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:37,818 INFO L225 Difference]: With dead ends: 46 [2020-10-28 14:40:37,819 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 14:40:37,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:40:37,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 14:40:37,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-28 14:40:37,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 14:40:37,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-28 14:40:37,828 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 20 [2020-10-28 14:40:37,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:37,829 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-28 14:40:37,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:40:37,829 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-28 14:40:37,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 14:40:37,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:37,830 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:37,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:40:37,831 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:37,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:37,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1566229902, now seen corresponding path program 1 times [2020-10-28 14:40:37,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:37,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [187985144] [2020-10-28 14:40:37,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:37,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:37,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:37,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:38,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:38,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 14:40:38,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:40:38,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 733 [2020-10-28 14:40:38,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:38,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:38,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:40:38,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:40:38,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:40:38,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:38,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:38,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:38,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:38,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:38,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:38,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:38,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:40:38,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:38,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:38,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:38,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:38,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:38,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:38,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:40:38,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:38,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:38,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:38,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-28 14:40:38,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:38,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-28 14:40:38,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:38,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:38,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:40:38,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:40:38,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:40:38,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:38,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:40:38,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [187985144] [2020-10-28 14:40:38,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:38,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:40:38,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541057847] [2020-10-28 14:40:38,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:40:38,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:38,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:40:38,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:40:38,835 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 8 states. [2020-10-28 14:40:39,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:39,110 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2020-10-28 14:40:39,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:40:39,111 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-28 14:40:39,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:39,113 INFO L225 Difference]: With dead ends: 49 [2020-10-28 14:40:39,113 INFO L226 Difference]: Without dead ends: 34 [2020-10-28 14:40:39,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:40:39,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-28 14:40:39,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-28 14:40:39,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 14:40:39,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-28 14:40:39,132 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 23 [2020-10-28 14:40:39,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:39,134 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-28 14:40:39,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:40:39,134 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-28 14:40:39,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 14:40:39,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:39,135 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] [2020-10-28 14:40:39,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:40:39,136 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:39,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:39,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1930785652, now seen corresponding path program 2 times [2020-10-28 14:40:39,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:39,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226957201] [2020-10-28 14:40:39,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:39,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:39,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:39,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:41,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:41,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 14:40:41,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:40:41,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1847 [2020-10-28 14:40:41,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:41,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:41,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:40:41,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:40:41,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:40:41,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:41,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:41,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:41,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:41,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:41,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:41,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:41,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:40:41,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:41,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:41,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:41,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:41,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:41,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:41,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:40:41,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:41,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:41,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:41,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 14:40:41,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:41,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 261 [2020-10-28 14:40:41,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:41,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:41,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:40:41,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:40:41,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:40:41,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:41,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:40:41,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226957201] [2020-10-28 14:40:41,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:41,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:40:41,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081589659] [2020-10-28 14:40:41,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:40:41,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:41,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:40:41,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:40:41,461 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 9 states. [2020-10-28 14:40:41,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:41,740 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2020-10-28 14:40:41,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:40:41,741 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-28 14:40:41,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:41,742 INFO L225 Difference]: With dead ends: 52 [2020-10-28 14:40:41,742 INFO L226 Difference]: Without dead ends: 37 [2020-10-28 14:40:41,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:40:41,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-28 14:40:41,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-10-28 14:40:41,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-28 14:40:41,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-10-28 14:40:41,757 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 26 [2020-10-28 14:40:41,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:41,757 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-10-28 14:40:41,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:40:41,757 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-10-28 14:40:41,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 14:40:41,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:41,759 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:41,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:40:41,760 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:41,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:41,760 INFO L82 PathProgramCache]: Analyzing trace with hash -438842318, now seen corresponding path program 3 times [2020-10-28 14:40:41,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:41,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645245689] [2020-10-28 14:40:41,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:41,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:41,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:41,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:43,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:43,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 14:40:43,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:40:43,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2117 [2020-10-28 14:40:43,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:43,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:43,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:40:43,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:40:43,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 14:40:43,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:43,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:43,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:43,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:44,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:44,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:44,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:44,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:40:44,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:44,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:44,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:44,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:44,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:44,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:44,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:40:44,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:44,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:44,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:44,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 14:40:44,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:44,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 546 [2020-10-28 14:40:44,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:44,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:44,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:40:44,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:44,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 14:40:44,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:40:44,921 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:40:44,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645245689] [2020-10-28 14:40:44,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:44,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:40:44,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357654022] [2020-10-28 14:40:44,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:40:44,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:44,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:40:44,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:40:44,925 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 13 states. [2020-10-28 14:40:45,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:45,596 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2020-10-28 14:40:45,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:40:45,597 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-28 14:40:45,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:45,598 INFO L225 Difference]: With dead ends: 41 [2020-10-28 14:40:45,598 INFO L226 Difference]: Without dead ends: 37 [2020-10-28 14:40:45,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:40:45,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-28 14:40:45,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-28 14:40:45,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-28 14:40:45,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-10-28 14:40:45,608 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 29 [2020-10-28 14:40:45,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:45,608 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-10-28 14:40:45,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:40:45,608 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-10-28 14:40:45,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:40:45,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:45,609 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 14:40:45,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:40:45,610 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:45,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:45,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1064831677, now seen corresponding path program 1 times [2020-10-28 14:40:45,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:45,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148480094] [2020-10-28 14:40:45,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:45,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:45,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:45,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:46,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:49,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:49,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:40:49,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:40:49,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3951 [2020-10-28 14:40:49,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:49,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:49,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:40:49,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:40:49,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:40:49,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:49,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:49,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:49,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:49,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:49,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:49,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:49,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:40:49,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:49,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:49,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:49,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:49,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:49,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:49,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:40:49,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:49,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:49,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:49,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 14:40:49,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:49,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 298 [2020-10-28 14:40:49,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:49,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:49,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:40:49,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:40:49,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:40:49,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:50,073 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:40:50,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148480094] [2020-10-28 14:40:50,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:50,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:40:50,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981906940] [2020-10-28 14:40:50,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:40:50,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:50,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:40:50,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:40:50,076 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 10 states. [2020-10-28 14:40:50,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:40:50,322 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2020-10-28 14:40:50,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:40:50,323 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-10-28 14:40:50,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:40:50,324 INFO L225 Difference]: With dead ends: 59 [2020-10-28 14:40:50,324 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 14:40:50,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:40:50,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 14:40:50,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-10-28 14:40:50,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 14:40:50,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-10-28 14:40:50,332 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 32 [2020-10-28 14:40:50,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:40:50,332 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-10-28 14:40:50,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:40:50,332 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-10-28 14:40:50,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:40:50,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:40:50,333 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:40:50,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:40:50,334 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:40:50,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:40:50,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1753511395, now seen corresponding path program 2 times [2020-10-28 14:40:50,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:40:50,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [791516551] [2020-10-28 14:40:50,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:40:50,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:50,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:51,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:51,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:53,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:53,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:53,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:55,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:55,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 14:40:55,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 14:40:55,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 14:40:55,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:55,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:55,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:40:55,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:40:55,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:40:55,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:55,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:40:55,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:55,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:55,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:55,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:40:55,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:40:55,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:40:55,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:55,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:55,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:40:55,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:55,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:40:55,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:55,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:40:55,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:40:55,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:56,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:40:58,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:40:58,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 14:40:58,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:40:58,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2283 [2020-10-28 14:40:58,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:40:58,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:40:58,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:40:58,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:40:58,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:40:58,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:40:58,577 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 23 [2020-10-28 14:40:58,817 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 38 [2020-10-28 14:40:58,895 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:40:58,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [791516551] [2020-10-28 14:40:58,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:40:58,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:40:58,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030893241] [2020-10-28 14:40:58,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:40:58,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:40:58,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:40:58,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:40:58,899 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 17 states. [2020-10-28 14:41:00,122 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-28 14:41:00,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:00,435 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-10-28 14:41:00,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:41:00,436 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2020-10-28 14:41:00,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:00,437 INFO L225 Difference]: With dead ends: 48 [2020-10-28 14:41:00,437 INFO L226 Difference]: Without dead ends: 44 [2020-10-28 14:41:00,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2020-10-28 14:41:00,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-28 14:41:00,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-28 14:41:00,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-28 14:41:00,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-10-28 14:41:00,445 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 35 [2020-10-28 14:41:00,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:00,445 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-10-28 14:41:00,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:41:00,446 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-10-28 14:41:00,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 14:41:00,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:00,447 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1] [2020-10-28 14:41:00,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:41:00,454 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:00,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:00,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1487743649, now seen corresponding path program 1 times [2020-10-28 14:41:00,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:00,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450453198] [2020-10-28 14:41:00,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:00,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:00,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:00,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:04,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:05,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:05,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:41:05,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:41:05,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 14:41:05,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:05,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:05,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:41:05,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 14:41:05,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 14:41:05,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:05,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:05,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:05,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:05,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:05,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:05,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:05,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:41:05,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:05,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:05,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:05,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:05,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:05,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:05,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:41:05,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:05,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:06,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:06,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 14:41:06,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:06,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 706 [2020-10-28 14:41:06,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:06,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:06,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:41:06,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:06,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:41:06,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:06,546 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 14:41:06,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450453198] [2020-10-28 14:41:06,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:06,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:41:06,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668065441] [2020-10-28 14:41:06,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:41:06,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:06,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:41:06,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:41:06,549 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 13 states. [2020-10-28 14:41:07,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:07,032 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-10-28 14:41:07,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:41:07,032 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-28 14:41:07,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:07,034 INFO L225 Difference]: With dead ends: 51 [2020-10-28 14:41:07,034 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 14:41:07,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:41:07,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 14:41:07,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-28 14:41:07,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-28 14:41:07,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-10-28 14:41:07,051 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 36 [2020-10-28 14:41:07,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:07,054 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-10-28 14:41:07,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:41:07,055 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-10-28 14:41:07,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:41:07,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:07,056 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:07,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:41:07,056 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:07,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:07,057 INFO L82 PathProgramCache]: Analyzing trace with hash -93374612, now seen corresponding path program 3 times [2020-10-28 14:41:07,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:07,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291337658] [2020-10-28 14:41:07,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:07,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:07,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:07,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:08,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:12,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:12,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 14:41:12,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:41:12,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 14:41:12,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:12,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:12,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:41:12,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:41:12,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:41:12,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:12,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:12,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:12,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:12,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:12,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:12,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:12,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:41:12,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:12,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:12,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:12,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:12,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:12,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:12,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:41:12,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:12,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:13,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:13,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 14:41:13,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:13,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1292 [2020-10-28 14:41:13,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:13,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:13,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:41:13,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:13,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:41:13,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:14,470 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:41:14,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291337658] [2020-10-28 14:41:14,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:14,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 14:41:14,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383441710] [2020-10-28 14:41:14,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 14:41:14,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:14,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 14:41:14,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:41:14,473 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 19 states. [2020-10-28 14:41:15,336 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-10-28 14:41:15,623 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2020-10-28 14:41:15,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:15,888 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-10-28 14:41:15,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:41:15,888 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 38 [2020-10-28 14:41:15,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:15,890 INFO L225 Difference]: With dead ends: 51 [2020-10-28 14:41:15,890 INFO L226 Difference]: Without dead ends: 47 [2020-10-28 14:41:15,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:41:15,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-28 14:41:15,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-28 14:41:15,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 14:41:15,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-28 14:41:15,899 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 38 [2020-10-28 14:41:15,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:15,900 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-28 14:41:15,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 14:41:15,900 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-28 14:41:15,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:41:15,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:15,904 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1] [2020-10-28 14:41:15,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:41:15,904 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:15,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:15,905 INFO L82 PathProgramCache]: Analyzing trace with hash 68852280, now seen corresponding path program 1 times [2020-10-28 14:41:15,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:15,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047550638] [2020-10-28 14:41:15,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:15,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:16,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:16,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:19,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:21,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:21,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:41:21,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:41:21,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5065 [2020-10-28 14:41:21,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:21,057 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:21,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:41:21,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 14:41:21,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:41:21,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:21,375 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-10-28 14:41:21,535 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-10-28 14:41:21,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:21,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:21,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:21,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:21,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:21,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:21,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:41:21,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:21,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:21,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:21,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:21,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:21,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:21,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:41:21,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:21,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:22,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:22,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 14:41:22,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:22,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 846 [2020-10-28 14:41:22,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:22,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:22,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:41:22,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:22,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:41:22,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:23,233 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 40 [2020-10-28 14:41:23,566 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 43 [2020-10-28 14:41:23,915 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 49 [2020-10-28 14:41:24,092 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-10-28 14:41:24,116 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:41:24,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047550638] [2020-10-28 14:41:24,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:24,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:41:24,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424769289] [2020-10-28 14:41:24,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:41:24,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:24,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:41:24,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:41:24,119 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 18 states. [2020-10-28 14:41:24,873 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-10-28 14:41:25,160 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2020-10-28 14:41:25,486 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 79 [2020-10-28 14:41:26,075 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 106 [2020-10-28 14:41:26,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:26,398 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2020-10-28 14:41:26,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:41:26,398 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2020-10-28 14:41:26,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:26,399 INFO L225 Difference]: With dead ends: 53 [2020-10-28 14:41:26,399 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 14:41:26,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:41:26,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 14:41:26,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-28 14:41:26,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-28 14:41:26,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-10-28 14:41:26,410 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 39 [2020-10-28 14:41:26,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:26,410 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-10-28 14:41:26,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:41:26,411 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-10-28 14:41:26,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:41:26,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:26,412 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:26,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:41:26,412 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:26,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:26,413 INFO L82 PathProgramCache]: Analyzing trace with hash -2143347389, now seen corresponding path program 4 times [2020-10-28 14:41:26,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:26,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661821142] [2020-10-28 14:41:26,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:26,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:26,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:27,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:28,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:29,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:31,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:31,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 14:41:31,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:41:31,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-28 14:41:31,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:31,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:31,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 14:41:31,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:41:31,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:41:31,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:31,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:31,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:31,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:31,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:31,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:31,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:31,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:41:31,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:31,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:31,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:31,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:31,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:31,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:31,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:41:31,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:31,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:33,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:33,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 14:41:33,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:33,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1247 [2020-10-28 14:41:33,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:33,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:33,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:41:33,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:33,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:41:33,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:33,783 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2020-10-28 14:41:33,950 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2020-10-28 14:41:34,146 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-10-28 14:41:34,443 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2020-10-28 14:41:34,588 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:41:34,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661821142] [2020-10-28 14:41:34,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:34,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 14:41:34,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38238049] [2020-10-28 14:41:34,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 14:41:34,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:34,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 14:41:34,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:41:34,593 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 21 states. [2020-10-28 14:41:35,443 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-10-28 14:41:35,681 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2020-10-28 14:41:36,171 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 89 [2020-10-28 14:41:36,935 WARN L193 SmtUtils]: Spent 681.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 103 [2020-10-28 14:41:37,813 WARN L193 SmtUtils]: Spent 747.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 119 [2020-10-28 14:41:38,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:38,384 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2020-10-28 14:41:38,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:41:38,385 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2020-10-28 14:41:38,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:38,386 INFO L225 Difference]: With dead ends: 59 [2020-10-28 14:41:38,387 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 14:41:38,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=160, Invalid=896, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 14:41:38,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 14:41:38,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-10-28 14:41:38,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 14:41:38,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2020-10-28 14:41:38,398 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 41 [2020-10-28 14:41:38,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:38,398 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2020-10-28 14:41:38,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 14:41:38,398 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2020-10-28 14:41:38,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 14:41:38,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:38,399 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:38,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:41:38,400 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:38,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:38,400 INFO L82 PathProgramCache]: Analyzing trace with hash -518149020, now seen corresponding path program 1 times [2020-10-28 14:41:38,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:38,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612262119] [2020-10-28 14:41:38,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:38,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:38,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:38,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:40,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:42,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:43,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:44,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:44,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:41:44,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:41:44,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5739 [2020-10-28 14:41:44,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:44,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:44,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 14:41:44,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:41:44,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 14:41:44,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:44,570 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-10-28 14:41:45,046 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 85 [2020-10-28 14:41:45,216 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-10-28 14:41:45,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:45,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:45,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:45,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:45,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:45,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:45,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:41:45,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:45,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:45,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:45,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:45,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:45,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:45,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:41:45,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:45,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:46,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:46,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 14:41:46,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:46,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1350 [2020-10-28 14:41:46,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:46,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:46,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:41:46,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:46,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:41:46,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:47,710 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 25 [2020-10-28 14:41:48,537 WARN L193 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 66 [2020-10-28 14:41:49,051 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2020-10-28 14:41:49,073 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:41:49,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612262119] [2020-10-28 14:41:49,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:49,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 14:41:49,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021630186] [2020-10-28 14:41:49,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 14:41:49,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:49,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 14:41:49,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:41:49,075 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 23 states. [2020-10-28 14:41:50,630 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 60 [2020-10-28 14:41:50,839 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2020-10-28 14:41:51,294 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 106 [2020-10-28 14:41:51,609 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-28 14:41:51,851 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-28 14:41:52,253 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2020-10-28 14:41:52,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:52,846 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2020-10-28 14:41:52,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 14:41:52,847 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 42 [2020-10-28 14:41:52,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:52,850 INFO L225 Difference]: With dead ends: 63 [2020-10-28 14:41:52,850 INFO L226 Difference]: Without dead ends: 52 [2020-10-28 14:41:52,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=206, Invalid=1774, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 14:41:52,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-28 14:41:52,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2020-10-28 14:41:52,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-28 14:41:52,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-10-28 14:41:52,871 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 42 [2020-10-28 14:41:52,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:52,871 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-10-28 14:41:52,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 14:41:52,871 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-10-28 14:41:52,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 14:41:52,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:52,874 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-28 14:41:52,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:41:52,875 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:52,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:52,878 INFO L82 PathProgramCache]: Analyzing trace with hash 944205633, now seen corresponding path program 2 times [2020-10-28 14:41:52,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:52,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595884710] [2020-10-28 14:41:52,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:52,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:53,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:54,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:55,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:57,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:57,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:41:57,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:41:57,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 14:41:57,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:57,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:57,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 14:41:57,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 14:41:57,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:41:57,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:58,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:58,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:58,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:58,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:58,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:58,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:58,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:41:58,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:58,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:58,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:58,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:58,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:58,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:58,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:41:58,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:58,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:59,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:59,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 14:41:59,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:59,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1002 [2020-10-28 14:41:59,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:59,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:59,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:41:59,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:59,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:41:59,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:00,131 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-10-28 14:42:00,395 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 58 [2020-10-28 14:42:00,738 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 63 [2020-10-28 14:42:01,072 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 57 [2020-10-28 14:42:01,240 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:42:01,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595884710] [2020-10-28 14:42:01,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:42:01,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 14:42:01,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738825542] [2020-10-28 14:42:01,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 14:42:01,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:42:01,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 14:42:01,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:42:01,242 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 21 states. [2020-10-28 14:42:01,965 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2020-10-28 14:42:02,266 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 78 [2020-10-28 14:42:02,900 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 94 [2020-10-28 14:42:03,595 WARN L193 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 107 [2020-10-28 14:42:04,590 WARN L193 SmtUtils]: Spent 888.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 130 [2020-10-28 14:42:05,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:42:05,081 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2020-10-28 14:42:05,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:42:05,081 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 42 [2020-10-28 14:42:05,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:42:05,082 INFO L225 Difference]: With dead ends: 58 [2020-10-28 14:42:05,082 INFO L226 Difference]: Without dead ends: 54 [2020-10-28 14:42:05,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:42:05,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-28 14:42:05,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-10-28 14:42:05,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 14:42:05,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-10-28 14:42:05,100 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 42 [2020-10-28 14:42:05,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:42:05,100 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-10-28 14:42:05,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 14:42:05,100 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-10-28 14:42:05,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:42:05,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:42:05,104 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:42:05,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:42:05,105 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:42:05,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:42:05,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1552602124, now seen corresponding path program 5 times [2020-10-28 14:42:05,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:42:05,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920130592] [2020-10-28 14:42:05,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:42:05,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:05,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:06,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:07,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:07,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:08,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:10,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:10,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 14:42:10,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:42:10,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 14:42:10,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:10,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:10,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 14:42:10,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:42:10,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 14:42:10,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:10,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:42:10,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:10,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:10,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:10,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:42:10,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:10,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:42:10,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:10,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:10,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:10,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:10,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:10,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:10,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:42:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:10,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:11,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:11,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 14:42:11,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:11,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1308 [2020-10-28 14:42:11,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:11,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:11,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:42:11,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:11,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:42:11,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:12,921 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2020-10-28 14:42:13,178 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2020-10-28 14:42:13,516 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2020-10-28 14:42:13,831 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 55 [2020-10-28 14:42:14,013 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-10-28 14:42:14,043 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:42:14,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920130592] [2020-10-28 14:42:14,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:42:14,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 14:42:14,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819200752] [2020-10-28 14:42:14,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 14:42:14,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:42:14,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 14:42:14,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:42:14,046 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 22 states. [2020-10-28 14:42:14,980 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-10-28 14:42:15,442 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-28 14:42:15,950 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-10-28 14:42:16,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:42:16,744 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2020-10-28 14:42:16,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:42:16,745 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 44 [2020-10-28 14:42:16,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:42:16,746 INFO L225 Difference]: With dead ends: 81 [2020-10-28 14:42:16,746 INFO L226 Difference]: Without dead ends: 77 [2020-10-28 14:42:16,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=101, Invalid=1021, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 14:42:16,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-28 14:42:16,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2020-10-28 14:42:16,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-28 14:42:16,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2020-10-28 14:42:16,760 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 44 [2020-10-28 14:42:16,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:42:16,760 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2020-10-28 14:42:16,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 14:42:16,761 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2020-10-28 14:42:16,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 14:42:16,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:42:16,762 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, 1] [2020-10-28 14:42:16,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:42:16,762 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:42:16,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:42:16,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1907831109, now seen corresponding path program 2 times [2020-10-28 14:42:16,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:42:16,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211877803] [2020-10-28 14:42:16,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:42:16,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:16,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:17,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:20,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:21,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:21,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 14:42:21,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:42:21,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 14:42:21,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:21,868 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:21,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 14:42:21,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 14:42:21,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 14:42:21,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:22,200 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 44 [2020-10-28 14:42:22,418 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 45 [2020-10-28 14:42:22,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:42:22,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:22,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:22,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:22,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:42:22,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:22,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:42:22,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:22,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:22,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:22,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:22,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:22,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:22,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:42:22,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:22,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:23,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:23,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 14:42:23,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:23,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 908 [2020-10-28 14:42:23,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:23,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:23,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:42:23,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:23,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:42:23,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:24,318 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2020-10-28 14:42:24,550 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2020-10-28 14:42:24,872 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2020-10-28 14:42:25,263 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 58 [2020-10-28 14:42:25,943 WARN L193 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 60 [2020-10-28 14:42:26,151 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-10-28 14:42:26,178 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:42:26,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211877803] [2020-10-28 14:42:26,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:42:26,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 14:42:26,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690607724] [2020-10-28 14:42:26,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 14:42:26,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:42:26,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 14:42:26,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:42:26,180 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand 23 states. [2020-10-28 14:42:27,179 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 72 [2020-10-28 14:42:27,707 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 89 [2020-10-28 14:42:28,476 WARN L193 SmtUtils]: Spent 670.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 99 [2020-10-28 14:42:29,485 WARN L193 SmtUtils]: Spent 872.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 123 [2020-10-28 14:42:30,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:42:30,148 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2020-10-28 14:42:30,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 14:42:30,148 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 45 [2020-10-28 14:42:30,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:42:30,149 INFO L225 Difference]: With dead ends: 80 [2020-10-28 14:42:30,149 INFO L226 Difference]: Without dead ends: 76 [2020-10-28 14:42:30,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:42:30,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-28 14:42:30,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-10-28 14:42:30,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-28 14:42:30,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2020-10-28 14:42:30,163 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 45 [2020-10-28 14:42:30,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:42:30,164 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2020-10-28 14:42:30,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 14:42:30,164 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2020-10-28 14:42:30,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 14:42:30,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:42:30,165 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:42:30,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:42:30,165 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:42:30,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:42:30,166 INFO L82 PathProgramCache]: Analyzing trace with hash -445476456, now seen corresponding path program 3 times [2020-10-28 14:42:30,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:42:30,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192537666] [2020-10-28 14:42:30,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:42:30,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:30,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:31,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:35,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:35,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 14:42:35,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:42:35,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 14:42:35,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:35,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:35,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 14:42:35,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 14:42:35,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:42:35,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:36,575 WARN L193 SmtUtils]: Spent 894.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 55 [2020-10-28 14:42:37,468 WARN L193 SmtUtils]: Spent 870.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 69 [2020-10-28 14:42:38,024 WARN L193 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 71 [2020-10-28 14:42:38,314 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-28 14:42:38,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:42:38,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:38,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:38,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:38,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:42:38,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:38,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:42:38,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:38,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:38,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:38,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:38,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:38,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:38,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:42:38,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:38,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:39,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:39,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 14:42:39,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:39,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1227 [2020-10-28 14:42:39,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:39,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:39,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:42:39,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:39,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:42:39,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:43,288 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2020-10-28 14:42:43,650 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-10-28 14:42:44,276 WARN L193 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 51 [2020-10-28 14:42:45,152 WARN L193 SmtUtils]: Spent 765.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 67 [2020-10-28 14:42:48,701 WARN L193 SmtUtils]: Spent 3.28 s on a formula simplification. DAG size of input: 332 DAG size of output: 89 [2020-10-28 14:42:52,544 WARN L193 SmtUtils]: Spent 3.59 s on a formula simplification. DAG size of input: 326 DAG size of output: 101 [2020-10-28 14:43:28,060 WARN L193 SmtUtils]: Spent 32.26 s on a formula simplification. DAG size of input: 4760 DAG size of output: 112 [2020-10-28 14:43:29,280 WARN L193 SmtUtils]: Spent 952.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 57 [2020-10-28 14:43:29,317 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:43:29,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192537666] [2020-10-28 14:43:29,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:43:29,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 14:43:29,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314569924] [2020-10-28 14:43:29,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 14:43:29,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:43:29,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 14:43:29,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:43:29,321 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand 23 states. [2020-10-28 14:43:31,053 WARN L193 SmtUtils]: Spent 874.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 151 [2020-10-28 14:43:32,259 WARN L193 SmtUtils]: Spent 741.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 14:43:33,096 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 80 [2020-10-28 14:43:33,601 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 102 [2020-10-28 14:43:33,895 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-10-28 14:43:34,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:43:34,455 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2020-10-28 14:43:34,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 14:43:34,456 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 45 [2020-10-28 14:43:34,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:43:34,457 INFO L225 Difference]: With dead ends: 85 [2020-10-28 14:43:34,457 INFO L226 Difference]: Without dead ends: 81 [2020-10-28 14:43:34,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 51.8s TimeCoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:43:34,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-28 14:43:34,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2020-10-28 14:43:34,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-28 14:43:34,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2020-10-28 14:43:34,476 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 45 [2020-10-28 14:43:34,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:43:34,477 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2020-10-28 14:43:34,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 14:43:34,477 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2020-10-28 14:43:34,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 14:43:34,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:43:34,478 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:43:34,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:43:34,478 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:43:34,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:43:34,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1802943651, now seen corresponding path program 6 times [2020-10-28 14:43:34,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:43:34,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601444289] [2020-10-28 14:43:34,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:43:34,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:34,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:35,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:39,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:39,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 14:43:39,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:43:39,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4699 [2020-10-28 14:43:39,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:39,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:39,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 14:43:39,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:43:39,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 14:43:39,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:39,563 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 41 [2020-10-28 14:43:39,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:43:39,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:39,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:39,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:39,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:43:39,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:39,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:43:39,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:39,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:39,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:43:39,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:39,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:43:39,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:39,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:43:39,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:39,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:40,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:40,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 14:43:40,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:40,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1048 [2020-10-28 14:43:40,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:40,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:40,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:43:40,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:40,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 14:43:40,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:41,565 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 35 [2020-10-28 14:43:41,768 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 35 [2020-10-28 14:43:42,023 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 47 [2020-10-28 14:43:42,209 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2020-10-28 14:43:42,416 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2020-10-28 14:43:42,624 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-10-28 14:43:42,757 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:43:42,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601444289] [2020-10-28 14:43:42,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:43:42,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 14:43:42,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790286337] [2020-10-28 14:43:42,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 14:43:42,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:43:42,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 14:43:42,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:43:42,759 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand 24 states. [2020-10-28 14:43:43,601 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-10-28 14:43:44,230 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-28 14:43:45,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:43:45,423 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2020-10-28 14:43:45,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 14:43:45,424 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 47 [2020-10-28 14:43:45,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:43:45,425 INFO L225 Difference]: With dead ends: 88 [2020-10-28 14:43:45,426 INFO L226 Difference]: Without dead ends: 84 [2020-10-28 14:43:45,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 14:43:45,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-28 14:43:45,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2020-10-28 14:43:45,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-28 14:43:45,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2020-10-28 14:43:45,444 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 47 [2020-10-28 14:43:45,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:43:45,444 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2020-10-28 14:43:45,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 14:43:45,444 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2020-10-28 14:43:45,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 14:43:45,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:43:45,447 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:43:45,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 14:43:45,447 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:43:45,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:43:45,447 INFO L82 PathProgramCache]: Analyzing trace with hash 2126624306, now seen corresponding path program 7 times [2020-10-28 14:43:45,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:43:45,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819286858] [2020-10-28 14:43:45,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:43:45,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:45,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:45,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:46,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:50,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:51,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:51,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 14:43:51,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:43:51,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5628 [2020-10-28 14:43:51,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:51,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:51,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:43:51,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:43:51,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:43:51,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:51,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:43:51,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:51,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:51,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:51,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:43:51,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:51,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:43:51,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:51,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:51,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:43:51,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:51,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:43:51,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:43:51,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:43:51,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:51,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:51,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:51,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 14:43:51,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:51,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 492 [2020-10-28 14:43:51,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:51,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:51,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:43:51,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:43:51,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:43:51,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:51,764 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-28 14:43:51,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819286858] [2020-10-28 14:43:51,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:43:51,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:43:51,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013557060] [2020-10-28 14:43:51,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:43:51,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:43:51,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:43:51,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:43:51,766 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand 11 states. [2020-10-28 14:43:52,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:43:52,188 INFO L93 Difference]: Finished difference Result 97 states and 107 transitions. [2020-10-28 14:43:52,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:43:52,189 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2020-10-28 14:43:52,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:43:52,190 INFO L225 Difference]: With dead ends: 97 [2020-10-28 14:43:52,190 INFO L226 Difference]: Without dead ends: 62 [2020-10-28 14:43:52,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:43:52,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-28 14:43:52,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-28 14:43:52,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-28 14:43:52,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2020-10-28 14:43:52,201 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 47 [2020-10-28 14:43:52,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:43:52,202 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2020-10-28 14:43:52,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:43:52,202 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2020-10-28 14:43:52,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 14:43:52,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:43:52,202 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-28 14:43:52,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 14:43:52,203 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:43:52,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:43:52,203 INFO L82 PathProgramCache]: Analyzing trace with hash 403604737, now seen corresponding path program 3 times [2020-10-28 14:43:52,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:43:52,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794386253] [2020-10-28 14:43:52,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:43:52,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:52,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:52,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:54,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:58,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:58,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 14:43:58,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:43:58,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6136 [2020-10-28 14:43:58,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:58,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:58,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 14:43:58,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:43:58,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 14:43:58,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:00,356 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 222 DAG size of output: 136 [2020-10-28 14:44:02,183 WARN L193 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 251 DAG size of output: 146 [2020-10-28 14:44:04,440 WARN L193 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 251 DAG size of output: 146 [2020-10-28 14:44:06,215 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 218 DAG size of output: 137 [2020-10-28 14:44:07,753 WARN L193 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 202 DAG size of output: 122 [2020-10-28 14:44:09,074 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 182 DAG size of output: 119 [2020-10-28 14:44:09,573 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 75 [2020-10-28 14:44:10,010 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 84 [2020-10-28 14:44:10,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:10,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:10,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:10,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:10,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:10,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:10,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:44:10,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:10,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:10,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:10,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:10,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:10,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:10,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:44:10,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:10,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:11,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:12,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:15,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:15,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 14:44:15,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:44:15,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4699 [2020-10-28 14:44:15,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:15,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:15,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:44:15,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:15,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 14:44:15,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:17,035 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 23 [2020-10-28 14:44:17,966 WARN L193 SmtUtils]: Spent 762.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 72