/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=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/forester-heap/sll-queue-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:06:08,173 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:06:08,176 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:06:08,219 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:06:08,220 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:06:08,226 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:06:08,228 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:06:08,233 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:06:08,236 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:06:08,243 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:06:08,244 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:06:08,245 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:06:08,246 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:06:08,247 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:06:08,248 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:06:08,249 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:06:08,250 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:06:08,251 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:06:08,253 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:06:08,267 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:06:08,272 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:06:08,274 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:06:08,276 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:06:08,279 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:06:08,287 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:06:08,288 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:06:08,288 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:06:08,294 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:06:08,295 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:06:08,296 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:06:08,297 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:06:08,298 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:06:08,300 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:06:08,301 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:06:08,302 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:06:08,302 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:06:08,303 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:06:08,303 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:06:08,304 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:06:08,305 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:06:08,306 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:06:08,310 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 01:06:08,346 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:06:08,346 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:06:08,348 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:06:08,348 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:06:08,348 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:06:08,349 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:06:08,349 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:06:08,349 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:06:08,349 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:06:08,349 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:06:08,350 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:06:08,350 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:06:08,350 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:06:08,350 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:06:08,350 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:06:08,351 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:06:08,351 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:06:08,351 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:06:08,351 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:06:08,352 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:06:08,352 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:06:08,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:06:08,352 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:06:08,352 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:06:08,353 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:06:08,353 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:06:08,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:06:08,353 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:06:08,354 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:06:08,354 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:06:08,724 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:06:08,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:06:08,760 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:06:08,761 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:06:08,762 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:06:08,764 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-queue-2.i [2020-10-27 01:06:08,850 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d2556c0ab/57e3af90c9ab46f387c33a21e966a4bc/FLAG0146240a7 [2020-10-27 01:06:09,620 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:06:09,621 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-queue-2.i [2020-10-27 01:06:09,634 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d2556c0ab/57e3af90c9ab46f387c33a21e966a4bc/FLAG0146240a7 [2020-10-27 01:06:09,869 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d2556c0ab/57e3af90c9ab46f387c33a21e966a4bc [2020-10-27 01:06:09,872 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:06:09,879 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:06:09,883 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:06:09,883 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:06:09,894 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:06:09,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:06:09" (1/1) ... [2020-10-27 01:06:09,898 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64494ac6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:06:09, skipping insertion in model container [2020-10-27 01:06:09,898 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:06:09" (1/1) ... [2020-10-27 01:06:09,908 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:06:09,959 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:06:10,252 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:06:10,262 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:06:10,311 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:06:10,397 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:06:10,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:06:10 WrapperNode [2020-10-27 01:06:10,398 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:06:10,399 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:06:10,399 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:06:10,399 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:06:10,417 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:06:10" (1/1) ... [2020-10-27 01:06:10,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:06:10" (1/1) ... [2020-10-27 01:06:10,468 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:06:10" (1/1) ... [2020-10-27 01:06:10,469 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:06:10" (1/1) ... [2020-10-27 01:06:10,494 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:06:10" (1/1) ... [2020-10-27 01:06:10,503 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:06:10" (1/1) ... [2020-10-27 01:06:10,545 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:06:10" (1/1) ... [2020-10-27 01:06:10,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:06:10,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:06:10,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:06:10,555 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:06:10,556 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:06:10" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:06:10,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:06:10,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:06:10,657 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:06:10,657 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:06:10,658 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 01:06:10,659 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 01:06:10,659 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 01:06:10,659 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 01:06:10,659 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 01:06:10,659 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 01:06:10,660 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 01:06:10,661 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 01:06:10,661 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 01:06:10,661 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 01:06:10,661 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 01:06:10,662 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 01:06:10,662 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 01:06:10,663 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 01:06:10,663 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 01:06:10,663 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 01:06:10,663 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 01:06:10,663 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 01:06:10,663 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 01:06:10,664 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 01:06:10,664 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 01:06:10,664 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 01:06:10,664 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 01:06:10,664 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 01:06:10,664 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 01:06:10,665 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 01:06:10,665 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 01:06:10,665 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 01:06:10,665 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 01:06:10,665 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 01:06:10,665 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 01:06:10,666 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 01:06:10,666 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 01:06:10,666 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 01:06:10,666 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 01:06:10,666 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 01:06:10,666 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 01:06:10,667 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 01:06:10,667 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 01:06:10,667 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 01:06:10,667 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 01:06:10,667 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 01:06:10,667 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 01:06:10,668 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 01:06:10,668 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 01:06:10,668 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 01:06:10,668 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 01:06:10,668 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 01:06:10,669 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 01:06:10,669 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 01:06:10,670 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 01:06:10,671 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 01:06:10,671 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 01:06:10,671 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 01:06:10,671 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 01:06:10,671 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 01:06:10,672 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 01:06:10,672 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 01:06:10,672 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 01:06:10,672 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:06:10,672 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 01:06:10,673 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 01:06:10,673 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 01:06:10,673 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 01:06:10,673 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 01:06:10,673 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 01:06:10,674 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 01:06:10,674 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 01:06:10,675 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 01:06:10,676 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 01:06:10,676 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 01:06:10,676 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 01:06:10,676 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 01:06:10,677 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 01:06:10,677 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 01:06:10,677 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 01:06:10,677 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 01:06:10,678 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 01:06:10,678 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 01:06:10,678 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 01:06:10,678 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 01:06:10,679 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 01:06:10,679 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 01:06:10,679 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 01:06:10,679 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 01:06:10,679 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 01:06:10,679 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 01:06:10,680 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 01:06:10,680 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 01:06:10,680 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 01:06:10,680 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 01:06:10,680 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 01:06:10,680 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 01:06:10,680 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 01:06:10,681 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 01:06:10,681 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 01:06:10,681 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 01:06:10,681 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 01:06:10,681 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 01:06:10,682 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 01:06:10,682 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 01:06:10,682 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 01:06:10,682 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 01:06:10,682 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:06:10,682 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:06:10,682 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:06:10,683 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:06:10,683 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:06:10,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:06:10,683 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:06:10,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 01:06:10,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 01:06:10,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:06:10,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 01:06:10,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:06:10,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:06:10,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:06:10,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:06:10,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:06:11,547 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:06:11,547 INFO L298 CfgBuilder]: Removed 31 assume(true) statements. [2020-10-27 01:06:11,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:06:11 BoogieIcfgContainer [2020-10-27 01:06:11,549 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:06:11,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:06:11,552 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:06:11,555 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:06:11,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:06:09" (1/3) ... [2020-10-27 01:06:11,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eafb4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:06:11, skipping insertion in model container [2020-10-27 01:06:11,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:06:10" (2/3) ... [2020-10-27 01:06:11,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eafb4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:06:11, skipping insertion in model container [2020-10-27 01:06:11,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:06:11" (3/3) ... [2020-10-27 01:06:11,559 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-queue-2.i [2020-10-27 01:06:11,572 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:06:11,577 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:06:11,590 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:06:11,618 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:06:11,618 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:06:11,619 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:06:11,619 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:06:11,619 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:06:11,619 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:06:11,619 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:06:11,619 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:06:11,639 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2020-10-27 01:06:11,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-27 01:06:11,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:11,646 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:11,647 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:11,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:11,653 INFO L82 PathProgramCache]: Analyzing trace with hash 218866609, now seen corresponding path program 1 times [2020-10-27 01:06:11,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:11,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271003543] [2020-10-27 01:06:11,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:11,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:11,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:11,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:12,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:12,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-27 01:06:12,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:06:12,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 254 [2020-10-27 01:06:12,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:12,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:06:12,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:12,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 01:06:12,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 01:06:12,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:12,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:12,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:12,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:12,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:12,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:12,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-27 01:06:12,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:12,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:12,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:12,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:12,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:12,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:12,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271003543] [2020-10-27 01:06:12,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:06:12,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:06:12,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006939898] [2020-10-27 01:06:12,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:06:12,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:12,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:06:12,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:06:12,213 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 4 states. [2020-10-27 01:06:12,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:12,446 INFO L93 Difference]: Finished difference Result 164 states and 300 transitions. [2020-10-27 01:06:12,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:06:12,448 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-27 01:06:12,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:12,458 INFO L225 Difference]: With dead ends: 164 [2020-10-27 01:06:12,458 INFO L226 Difference]: Without dead ends: 68 [2020-10-27 01:06:12,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:06:12,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-27 01:06:12,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-27 01:06:12,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-27 01:06:12,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 85 transitions. [2020-10-27 01:06:12,511 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 85 transitions. Word has length 11 [2020-10-27 01:06:12,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:12,512 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 85 transitions. [2020-10-27 01:06:12,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:06:12,512 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 85 transitions. [2020-10-27 01:06:12,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 01:06:12,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:12,513 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:12,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:06:12,514 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:12,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:12,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1246734287, now seen corresponding path program 1 times [2020-10-27 01:06:12,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:12,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751003196] [2020-10-27 01:06:12,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:12,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:12,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:12,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:12,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 01:06:12,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:12,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-10-27 01:06:12,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:12,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:06:12,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:06:12,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 01:06:12,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:12,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:12,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:12,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:12,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:12,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:12,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:12,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:06:12,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:12,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:12,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:12,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:12,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:12,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:12,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1751003196] [2020-10-27 01:06:12,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:06:12,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:06:12,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766278191] [2020-10-27 01:06:12,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:06:12,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:12,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:06:12,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:06:12,732 INFO L87 Difference]: Start difference. First operand 68 states and 85 transitions. Second operand 4 states. [2020-10-27 01:06:12,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:12,889 INFO L93 Difference]: Finished difference Result 71 states and 87 transitions. [2020-10-27 01:06:12,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:06:12,890 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-27 01:06:12,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:12,891 INFO L225 Difference]: With dead ends: 71 [2020-10-27 01:06:12,891 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 01:06:12,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:06:12,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 01:06:12,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-27 01:06:12,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 01:06:12,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2020-10-27 01:06:12,904 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 15 [2020-10-27 01:06:12,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:12,905 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2020-10-27 01:06:12,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:06:12,905 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2020-10-27 01:06:12,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:06:12,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:12,906 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:12,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:06:12,907 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:12,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:12,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1069993799, now seen corresponding path program 1 times [2020-10-27 01:06:12,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:12,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963894611] [2020-10-27 01:06:12,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:12,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:12,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:13,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:13,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 01:06:13,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:13,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-27 01:06:13,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:13,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:06:13,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:13,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:06:13,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:13,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:13,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:13,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:13,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:13,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:13,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:13,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:06:13,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:13,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:13,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:13,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:13,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:13,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:13,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963894611] [2020-10-27 01:06:13,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:06:13,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:06:13,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959478433] [2020-10-27 01:06:13,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:06:13,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:13,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:06:13,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:06:13,074 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand 4 states. [2020-10-27 01:06:13,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:13,247 INFO L93 Difference]: Finished difference Result 146 states and 186 transitions. [2020-10-27 01:06:13,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:06:13,248 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-27 01:06:13,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:13,249 INFO L225 Difference]: With dead ends: 146 [2020-10-27 01:06:13,249 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 01:06:13,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:06:13,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 01:06:13,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2020-10-27 01:06:13,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-27 01:06:13,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2020-10-27 01:06:13,264 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 18 [2020-10-27 01:06:13,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:13,264 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2020-10-27 01:06:13,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:06:13,265 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2020-10-27 01:06:13,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:06:13,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:13,266 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] [2020-10-27 01:06:13,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:06:13,267 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:13,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:13,267 INFO L82 PathProgramCache]: Analyzing trace with hash 937711355, now seen corresponding path program 1 times [2020-10-27 01:06:13,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:13,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137247411] [2020-10-27 01:06:13,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:13,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:13,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:13,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:13,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:13,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:13,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:06:13,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:06:13,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 335 [2020-10-27 01:06:13,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:13,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:06:13,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:13,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:06:13,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:13,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:13,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:13,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:13,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:13,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:13,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:13,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:06:13,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:13,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:13,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:13,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:13,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:13,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:13,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137247411] [2020-10-27 01:06:13,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:06:13,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:06:13,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12597742] [2020-10-27 01:06:13,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:06:13,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:13,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:06:13,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:06:13,727 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand 6 states. [2020-10-27 01:06:13,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:13,924 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2020-10-27 01:06:13,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:06:13,925 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-27 01:06:13,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:13,926 INFO L225 Difference]: With dead ends: 92 [2020-10-27 01:06:13,926 INFO L226 Difference]: Without dead ends: 70 [2020-10-27 01:06:13,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:06:13,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-27 01:06:13,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-27 01:06:13,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-27 01:06:13,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2020-10-27 01:06:13,935 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 23 [2020-10-27 01:06:13,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:13,936 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2020-10-27 01:06:13,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:06:13,936 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2020-10-27 01:06:13,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:06:13,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:13,937 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:13,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:06:13,938 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:13,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:13,938 INFO L82 PathProgramCache]: Analyzing trace with hash 309576248, now seen corresponding path program 1 times [2020-10-27 01:06:13,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:13,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764040678] [2020-10-27 01:06:13,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:13,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:13,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:14,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:14,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:06:14,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:14,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-27 01:06:14,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:14,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:06:14,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:14,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:06:14,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:14,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:14,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:14,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:14,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:14,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:14,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:14,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:06:14,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:14,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:14,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:14,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:14,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:14,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:14,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764040678] [2020-10-27 01:06:14,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:14,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:06:14,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652533981] [2020-10-27 01:06:14,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:06:14,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:14,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:06:14,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:06:14,242 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand 7 states. [2020-10-27 01:06:14,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:14,551 INFO L93 Difference]: Finished difference Result 128 states and 155 transitions. [2020-10-27 01:06:14,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:06:14,552 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-27 01:06:14,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:14,553 INFO L225 Difference]: With dead ends: 128 [2020-10-27 01:06:14,553 INFO L226 Difference]: Without dead ends: 124 [2020-10-27 01:06:14,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:06:14,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-27 01:06:14,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 83. [2020-10-27 01:06:14,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 01:06:14,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2020-10-27 01:06:14,564 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 25 [2020-10-27 01:06:14,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:14,564 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2020-10-27 01:06:14,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:06:14,565 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2020-10-27 01:06:14,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:06:14,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:14,566 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:14,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:06:14,566 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:14,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:14,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1376318958, now seen corresponding path program 1 times [2020-10-27 01:06:14,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:14,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556195027] [2020-10-27 01:06:14,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:14,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:14,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:14,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:14,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:14,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:14,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:06:14,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:06:14,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 304 [2020-10-27 01:06:14,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:14,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:06:14,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:14,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:06:14,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:14,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:14,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:14,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:14,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:14,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:14,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:14,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:06:14,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:14,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:14,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:14,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:14,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:14,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:14,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556195027] [2020-10-27 01:06:14,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:14,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:06:14,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338777119] [2020-10-27 01:06:14,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:06:14,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:14,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:06:14,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:06:14,994 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand 7 states. [2020-10-27 01:06:15,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:15,410 INFO L93 Difference]: Finished difference Result 127 states and 153 transitions. [2020-10-27 01:06:15,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:06:15,411 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-27 01:06:15,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:15,412 INFO L225 Difference]: With dead ends: 127 [2020-10-27 01:06:15,412 INFO L226 Difference]: Without dead ends: 123 [2020-10-27 01:06:15,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:06:15,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-27 01:06:15,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 89. [2020-10-27 01:06:15,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-27 01:06:15,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2020-10-27 01:06:15,428 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 26 [2020-10-27 01:06:15,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:15,429 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2020-10-27 01:06:15,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:06:15,431 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2020-10-27 01:06:15,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:06:15,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:15,432 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:15,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:06:15,433 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:15,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:15,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1749170472, now seen corresponding path program 1 times [2020-10-27 01:06:15,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:15,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886116040] [2020-10-27 01:06:15,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:15,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:15,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:15,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:15,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:15,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:15,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:06:15,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:06:15,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 226 [2020-10-27 01:06:15,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:15,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:06:15,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:15,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:06:15,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:15,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:15,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:15,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:15,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:15,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:15,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:15,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:06:15,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:15,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:15,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:15,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:15,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:15,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:15,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886116040] [2020-10-27 01:06:15,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:15,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:06:15,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103784675] [2020-10-27 01:06:15,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:06:15,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:15,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:06:15,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:06:15,777 INFO L87 Difference]: Start difference. First operand 89 states and 107 transitions. Second operand 7 states. [2020-10-27 01:06:16,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:16,058 INFO L93 Difference]: Finished difference Result 126 states and 151 transitions. [2020-10-27 01:06:16,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:06:16,059 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-27 01:06:16,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:16,061 INFO L225 Difference]: With dead ends: 126 [2020-10-27 01:06:16,061 INFO L226 Difference]: Without dead ends: 122 [2020-10-27 01:06:16,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:06:16,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-27 01:06:16,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 98. [2020-10-27 01:06:16,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-27 01:06:16,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 118 transitions. [2020-10-27 01:06:16,072 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 118 transitions. Word has length 27 [2020-10-27 01:06:16,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:16,072 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 118 transitions. [2020-10-27 01:06:16,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:06:16,072 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 118 transitions. [2020-10-27 01:06:16,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:06:16,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:16,074 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:16,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:06:16,074 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:16,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:16,075 INFO L82 PathProgramCache]: Analyzing trace with hash 262399079, now seen corresponding path program 1 times [2020-10-27 01:06:16,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:16,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285275785] [2020-10-27 01:06:16,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:16,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:16,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:16,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:16,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:16,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:06:16,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:06:16,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-27 01:06:16,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:16,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:06:16,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 01:06:16,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:06:16,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:16,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:16,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:16,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:16,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:16,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:16,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:16,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:06:16,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:16,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:16,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:16,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:16,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:16,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:16,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285275785] [2020-10-27 01:06:16,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:06:16,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:06:16,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054807504] [2020-10-27 01:06:16,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:06:16,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:16,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:06:16,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:06:16,314 INFO L87 Difference]: Start difference. First operand 98 states and 118 transitions. Second operand 4 states. [2020-10-27 01:06:16,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:16,495 INFO L93 Difference]: Finished difference Result 184 states and 229 transitions. [2020-10-27 01:06:16,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:06:16,496 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-27 01:06:16,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:16,497 INFO L225 Difference]: With dead ends: 184 [2020-10-27 01:06:16,497 INFO L226 Difference]: Without dead ends: 110 [2020-10-27 01:06:16,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:06:16,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-27 01:06:16,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 97. [2020-10-27 01:06:16,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 01:06:16,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 118 transitions. [2020-10-27 01:06:16,521 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 118 transitions. Word has length 29 [2020-10-27 01:06:16,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:16,521 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 118 transitions. [2020-10-27 01:06:16,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:06:16,521 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 118 transitions. [2020-10-27 01:06:16,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:06:16,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:16,522 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:16,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:06:16,523 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:16,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:16,524 INFO L82 PathProgramCache]: Analyzing trace with hash -2125210404, now seen corresponding path program 1 times [2020-10-27 01:06:16,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:16,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668993983] [2020-10-27 01:06:16,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:16,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:16,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:16,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:16,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:16,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:16,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:06:16,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:06:16,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-10-27 01:06:16,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:16,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:06:16,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 01:06:16,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:06:16,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:16,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:16,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:16,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:16,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:16,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:16,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:16,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:06:16,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:16,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:16,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:16,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:16,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:16,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:16,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668993983] [2020-10-27 01:06:16,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:06:16,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:06:16,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753208694] [2020-10-27 01:06:16,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:06:16,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:16,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:06:16,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:06:16,871 INFO L87 Difference]: Start difference. First operand 97 states and 118 transitions. Second operand 5 states. [2020-10-27 01:06:17,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:17,063 INFO L93 Difference]: Finished difference Result 172 states and 212 transitions. [2020-10-27 01:06:17,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:06:17,065 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-10-27 01:06:17,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:17,067 INFO L225 Difference]: With dead ends: 172 [2020-10-27 01:06:17,067 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 01:06:17,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:06:17,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 01:06:17,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-10-27 01:06:17,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 01:06:17,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 115 transitions. [2020-10-27 01:06:17,082 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 115 transitions. Word has length 30 [2020-10-27 01:06:17,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:17,084 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 115 transitions. [2020-10-27 01:06:17,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:06:17,084 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 115 transitions. [2020-10-27 01:06:17,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:06:17,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:17,087 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:17,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:06:17,087 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:17,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:17,087 INFO L82 PathProgramCache]: Analyzing trace with hash -2123363362, now seen corresponding path program 1 times [2020-10-27 01:06:17,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:17,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1170988697] [2020-10-27 01:06:17,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:17,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:17,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:17,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:17,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:17,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:06:17,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:06:17,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 260 [2020-10-27 01:06:17,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:17,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:06:17,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:17,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:06:17,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:17,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:17,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:17,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:17,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:17,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:17,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:17,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 01:06:17,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:17,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:17,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:17,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:17,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:17,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:17,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1170988697] [2020-10-27 01:06:17,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:17,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:06:17,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944588158] [2020-10-27 01:06:17,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:06:17,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:17,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:06:17,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:06:17,559 INFO L87 Difference]: Start difference. First operand 97 states and 115 transitions. Second operand 8 states. [2020-10-27 01:06:17,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:17,918 INFO L93 Difference]: Finished difference Result 122 states and 141 transitions. [2020-10-27 01:06:17,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:06:17,918 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-27 01:06:17,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:17,921 INFO L225 Difference]: With dead ends: 122 [2020-10-27 01:06:17,921 INFO L226 Difference]: Without dead ends: 118 [2020-10-27 01:06:17,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:06:17,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-27 01:06:17,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 107. [2020-10-27 01:06:17,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-27 01:06:17,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 125 transitions. [2020-10-27 01:06:17,931 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 125 transitions. Word has length 30 [2020-10-27 01:06:17,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:17,931 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 125 transitions. [2020-10-27 01:06:17,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:06:17,931 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 125 transitions. [2020-10-27 01:06:17,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:06:17,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:17,935 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:17,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:06:17,935 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:17,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:17,936 INFO L82 PathProgramCache]: Analyzing trace with hash -84648472, now seen corresponding path program 1 times [2020-10-27 01:06:17,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:17,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749636240] [2020-10-27 01:06:17,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:17,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:17,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:17,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:18,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:18,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:06:18,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:06:18,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 334 [2020-10-27 01:06:18,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:18,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:06:18,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:18,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:06:18,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:18,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:18,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:18,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:18,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:18,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:18,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:18,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:06:18,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:18,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:18,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:18,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:18,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:18,423 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:18,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749636240] [2020-10-27 01:06:18,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:18,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:06:18,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363758292] [2020-10-27 01:06:18,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:06:18,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:18,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:06:18,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:06:18,427 INFO L87 Difference]: Start difference. First operand 107 states and 125 transitions. Second operand 8 states. [2020-10-27 01:06:18,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:18,676 INFO L93 Difference]: Finished difference Result 110 states and 127 transitions. [2020-10-27 01:06:18,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:06:18,676 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-27 01:06:18,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:18,677 INFO L225 Difference]: With dead ends: 110 [2020-10-27 01:06:18,677 INFO L226 Difference]: Without dead ends: 106 [2020-10-27 01:06:18,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:06:18,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-27 01:06:18,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-10-27 01:06:18,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-27 01:06:18,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 123 transitions. [2020-10-27 01:06:18,686 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 123 transitions. Word has length 33 [2020-10-27 01:06:18,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:18,686 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 123 transitions. [2020-10-27 01:06:18,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:06:18,686 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 123 transitions. [2020-10-27 01:06:18,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:06:18,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:18,687 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:18,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:06:18,687 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:18,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:18,688 INFO L82 PathProgramCache]: Analyzing trace with hash 2040254526, now seen corresponding path program 1 times [2020-10-27 01:06:18,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:18,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563030674] [2020-10-27 01:06:18,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:18,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:18,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:18,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:18,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:06:18,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:18,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-10-27 01:06:18,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:18,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:06:18,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:18,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:06:18,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:19,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:19,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:19,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:19,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:19,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:19,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:19,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:06:19,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:19,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:19,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:19,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:19,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:19,046 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:19,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563030674] [2020-10-27 01:06:19,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:19,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:06:19,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77306341] [2020-10-27 01:06:19,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:06:19,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:19,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:06:19,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:06:19,049 INFO L87 Difference]: Start difference. First operand 106 states and 123 transitions. Second operand 8 states. [2020-10-27 01:06:19,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:19,321 INFO L93 Difference]: Finished difference Result 109 states and 125 transitions. [2020-10-27 01:06:19,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:06:19,322 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-10-27 01:06:19,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:19,323 INFO L225 Difference]: With dead ends: 109 [2020-10-27 01:06:19,323 INFO L226 Difference]: Without dead ends: 105 [2020-10-27 01:06:19,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:06:19,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-27 01:06:19,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-10-27 01:06:19,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-27 01:06:19,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 121 transitions. [2020-10-27 01:06:19,332 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 121 transitions. Word has length 34 [2020-10-27 01:06:19,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:19,332 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 121 transitions. [2020-10-27 01:06:19,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:06:19,332 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 121 transitions. [2020-10-27 01:06:19,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:06:19,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:19,333 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:19,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:06:19,333 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:19,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:19,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1652962952, now seen corresponding path program 1 times [2020-10-27 01:06:19,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:19,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734335081] [2020-10-27 01:06:19,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:19,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:19,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:19,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:19,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:19,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:19,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:06:19,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:06:19,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 286 [2020-10-27 01:06:19,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:19,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:06:19,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:19,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:06:19,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:19,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:19,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:19,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:19,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:19,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:19,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:19,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:06:19,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:19,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:19,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:19,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:19,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:19,777 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:19,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734335081] [2020-10-27 01:06:19,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:19,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:06:19,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370915439] [2020-10-27 01:06:19,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:06:19,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:19,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:06:19,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:06:19,779 INFO L87 Difference]: Start difference. First operand 105 states and 121 transitions. Second operand 8 states. [2020-10-27 01:06:20,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:20,011 INFO L93 Difference]: Finished difference Result 108 states and 123 transitions. [2020-10-27 01:06:20,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:06:20,012 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-27 01:06:20,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:20,013 INFO L225 Difference]: With dead ends: 108 [2020-10-27 01:06:20,013 INFO L226 Difference]: Without dead ends: 104 [2020-10-27 01:06:20,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:06:20,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-27 01:06:20,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-10-27 01:06:20,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-27 01:06:20,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 119 transitions. [2020-10-27 01:06:20,021 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 119 transitions. Word has length 35 [2020-10-27 01:06:20,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:20,021 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 119 transitions. [2020-10-27 01:06:20,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:06:20,022 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 119 transitions. [2020-10-27 01:06:20,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:06:20,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:20,022 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:20,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:06:20,023 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:20,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:20,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1242507287, now seen corresponding path program 1 times [2020-10-27 01:06:20,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:20,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281989087] [2020-10-27 01:06:20,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:20,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:20,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:20,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:20,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:06:20,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:20,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-27 01:06:20,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:20,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:06:20,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:20,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:06:20,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:20,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:20,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:20,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:20,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:20,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:20,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:20,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:06:20,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:20,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:20,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:20,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:20,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:20,329 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:20,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281989087] [2020-10-27 01:06:20,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:20,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:06:20,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869033707] [2020-10-27 01:06:20,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:06:20,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:20,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:06:20,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:06:20,331 INFO L87 Difference]: Start difference. First operand 104 states and 119 transitions. Second operand 8 states. [2020-10-27 01:06:20,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:20,868 INFO L93 Difference]: Finished difference Result 175 states and 201 transitions. [2020-10-27 01:06:20,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:06:20,868 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-10-27 01:06:20,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:20,870 INFO L225 Difference]: With dead ends: 175 [2020-10-27 01:06:20,870 INFO L226 Difference]: Without dead ends: 171 [2020-10-27 01:06:20,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:06:20,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-27 01:06:20,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 123. [2020-10-27 01:06:20,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-27 01:06:20,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 142 transitions. [2020-10-27 01:06:20,880 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 142 transitions. Word has length 37 [2020-10-27 01:06:20,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:20,881 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 142 transitions. [2020-10-27 01:06:20,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:06:20,881 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 142 transitions. [2020-10-27 01:06:20,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:06:20,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:20,882 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:20,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:06:20,882 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:20,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:20,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1218432810, now seen corresponding path program 1 times [2020-10-27 01:06:20,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:20,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707761898] [2020-10-27 01:06:20,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:20,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:20,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:20,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:21,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:21,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:06:21,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:06:21,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 257 [2020-10-27 01:06:21,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:21,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:06:21,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:21,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:06:21,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:21,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:21,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:21,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:21,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:21,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:21,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:21,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:06:21,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:21,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:21,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:21,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:21,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:21,315 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:21,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707761898] [2020-10-27 01:06:21,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:21,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:06:21,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82927870] [2020-10-27 01:06:21,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:06:21,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:21,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:06:21,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:06:21,318 INFO L87 Difference]: Start difference. First operand 123 states and 142 transitions. Second operand 9 states. [2020-10-27 01:06:21,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:21,717 INFO L93 Difference]: Finished difference Result 139 states and 158 transitions. [2020-10-27 01:06:21,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:06:21,717 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-10-27 01:06:21,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:21,718 INFO L225 Difference]: With dead ends: 139 [2020-10-27 01:06:21,718 INFO L226 Difference]: Without dead ends: 106 [2020-10-27 01:06:21,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:06:21,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-27 01:06:21,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-10-27 01:06:21,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-27 01:06:21,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 123 transitions. [2020-10-27 01:06:21,726 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 123 transitions. Word has length 38 [2020-10-27 01:06:21,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:21,726 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 123 transitions. [2020-10-27 01:06:21,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:06:21,726 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 123 transitions. [2020-10-27 01:06:21,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:06:21,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:21,727 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:21,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:06:21,727 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:21,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:21,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1804779986, now seen corresponding path program 1 times [2020-10-27 01:06:21,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:21,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532318133] [2020-10-27 01:06:21,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:21,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:21,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:21,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:22,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:22,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:06:22,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:06:22,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 417 [2020-10-27 01:06:22,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:22,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:06:22,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:22,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:06:22,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:22,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:22,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:22,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:22,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:22,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:22,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:22,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:06:22,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:22,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:22,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:22,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:22,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:22,497 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:22,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532318133] [2020-10-27 01:06:22,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:22,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:06:22,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446988756] [2020-10-27 01:06:22,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:06:22,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:22,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:06:22,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:06:22,504 INFO L87 Difference]: Start difference. First operand 106 states and 123 transitions. Second operand 10 states. [2020-10-27 01:06:23,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:23,097 INFO L93 Difference]: Finished difference Result 164 states and 188 transitions. [2020-10-27 01:06:23,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:06:23,098 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-27 01:06:23,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:23,101 INFO L225 Difference]: With dead ends: 164 [2020-10-27 01:06:23,101 INFO L226 Difference]: Without dead ends: 160 [2020-10-27 01:06:23,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:06:23,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-27 01:06:23,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 146. [2020-10-27 01:06:23,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-27 01:06:23,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 169 transitions. [2020-10-27 01:06:23,116 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 169 transitions. Word has length 38 [2020-10-27 01:06:23,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:23,117 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 169 transitions. [2020-10-27 01:06:23,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:06:23,117 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 169 transitions. [2020-10-27 01:06:23,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:06:23,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:23,118 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:23,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:06:23,118 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:23,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:23,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1324561949, now seen corresponding path program 1 times [2020-10-27 01:06:23,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:23,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118005665] [2020-10-27 01:06:23,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:23,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:23,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:23,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:23,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:23,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:23,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:06:23,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:06:23,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 298 [2020-10-27 01:06:23,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:23,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:06:23,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:23,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:06:23,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:23,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:23,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:23,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:23,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:23,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:23,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:23,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:06:23,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:23,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:23,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:23,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:23,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:23,558 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:23,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118005665] [2020-10-27 01:06:23,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:23,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:06:23,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007677713] [2020-10-27 01:06:23,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:06:23,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:23,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:06:23,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:06:23,563 INFO L87 Difference]: Start difference. First operand 146 states and 169 transitions. Second operand 8 states. [2020-10-27 01:06:23,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:23,920 INFO L93 Difference]: Finished difference Result 161 states and 184 transitions. [2020-10-27 01:06:23,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:06:23,921 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-10-27 01:06:23,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:23,922 INFO L225 Difference]: With dead ends: 161 [2020-10-27 01:06:23,922 INFO L226 Difference]: Without dead ends: 157 [2020-10-27 01:06:23,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:06:23,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-27 01:06:23,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 146. [2020-10-27 01:06:23,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-27 01:06:23,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 168 transitions. [2020-10-27 01:06:23,935 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 168 transitions. Word has length 38 [2020-10-27 01:06:23,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:23,935 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 168 transitions. [2020-10-27 01:06:23,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:06:23,935 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 168 transitions. [2020-10-27 01:06:23,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:06:23,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:23,936 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:23,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:06:23,937 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:23,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:23,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1953957478, now seen corresponding path program 1 times [2020-10-27 01:06:23,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:23,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446491759] [2020-10-27 01:06:23,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:23,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:23,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:23,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:24,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:24,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:06:24,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:06:24,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-27 01:06:24,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:24,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:06:24,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:06:24,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:06:24,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:24,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:24,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:24,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:24,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:24,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:24,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:24,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:06:24,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:24,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:24,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:24,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:24,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:24,140 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:06:24,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446491759] [2020-10-27 01:06:24,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:06:24,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:06:24,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258195906] [2020-10-27 01:06:24,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:06:24,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:24,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:06:24,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:06:24,142 INFO L87 Difference]: Start difference. First operand 146 states and 168 transitions. Second operand 4 states. [2020-10-27 01:06:24,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:24,324 INFO L93 Difference]: Finished difference Result 264 states and 307 transitions. [2020-10-27 01:06:24,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:06:24,324 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-10-27 01:06:24,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:24,326 INFO L225 Difference]: With dead ends: 264 [2020-10-27 01:06:24,326 INFO L226 Difference]: Without dead ends: 163 [2020-10-27 01:06:24,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:06:24,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-27 01:06:24,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 144. [2020-10-27 01:06:24,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-27 01:06:24,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 162 transitions. [2020-10-27 01:06:24,337 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 162 transitions. Word has length 41 [2020-10-27 01:06:24,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:24,338 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 162 transitions. [2020-10-27 01:06:24,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:06:24,338 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 162 transitions. [2020-10-27 01:06:24,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 01:06:24,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:24,339 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:24,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:06:24,339 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:24,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:24,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1070744259, now seen corresponding path program 1 times [2020-10-27 01:06:24,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:24,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092268891] [2020-10-27 01:06:24,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:24,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:24,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:24,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:24,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:24,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 01:06:24,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:06:24,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 456 [2020-10-27 01:06:24,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:24,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:06:24,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:24,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:06:24,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:24,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:24,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:24,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:24,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:24,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:24,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:24,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:06:24,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:24,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:24,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:24,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:24,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:24,976 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:24,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092268891] [2020-10-27 01:06:24,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:24,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:06:24,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392170268] [2020-10-27 01:06:24,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:06:24,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:24,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:06:24,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:06:24,978 INFO L87 Difference]: Start difference. First operand 144 states and 162 transitions. Second operand 9 states. [2020-10-27 01:06:25,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:25,287 INFO L93 Difference]: Finished difference Result 147 states and 164 transitions. [2020-10-27 01:06:25,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:06:25,288 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2020-10-27 01:06:25,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:25,289 INFO L225 Difference]: With dead ends: 147 [2020-10-27 01:06:25,290 INFO L226 Difference]: Without dead ends: 143 [2020-10-27 01:06:25,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:06:25,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-27 01:06:25,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2020-10-27 01:06:25,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-27 01:06:25,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 160 transitions. [2020-10-27 01:06:25,301 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 160 transitions. Word has length 46 [2020-10-27 01:06:25,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:25,301 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 160 transitions. [2020-10-27 01:06:25,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:06:25,301 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 160 transitions. [2020-10-27 01:06:25,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 01:06:25,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:25,302 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:25,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:06:25,302 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:25,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:25,303 INFO L82 PathProgramCache]: Analyzing trace with hash -501133880, now seen corresponding path program 1 times [2020-10-27 01:06:25,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:25,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439971481] [2020-10-27 01:06:25,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:25,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:25,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:25,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:25,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:25,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 01:06:25,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:06:25,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 629 [2020-10-27 01:06:25,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:25,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:06:25,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:25,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 01:06:25,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:26,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:26,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:26,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:26,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:26,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:26,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:26,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:06:26,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:26,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:26,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:26,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:26,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:26,404 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:26,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439971481] [2020-10-27 01:06:26,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:26,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:06:26,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150989683] [2020-10-27 01:06:26,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:06:26,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:26,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:06:26,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:06:26,407 INFO L87 Difference]: Start difference. First operand 143 states and 160 transitions. Second operand 11 states. [2020-10-27 01:06:26,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:26,937 INFO L93 Difference]: Finished difference Result 155 states and 172 transitions. [2020-10-27 01:06:26,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:06:26,938 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2020-10-27 01:06:26,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:26,940 INFO L225 Difference]: With dead ends: 155 [2020-10-27 01:06:26,940 INFO L226 Difference]: Without dead ends: 151 [2020-10-27 01:06:26,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:06:26,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-27 01:06:26,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 105. [2020-10-27 01:06:26,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-27 01:06:26,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 118 transitions. [2020-10-27 01:06:26,951 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 118 transitions. Word has length 47 [2020-10-27 01:06:26,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:26,951 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 118 transitions. [2020-10-27 01:06:26,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:06:26,951 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 118 transitions. [2020-10-27 01:06:26,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 01:06:26,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:26,952 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:26,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:06:26,952 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:26,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:26,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1666759241, now seen corresponding path program 1 times [2020-10-27 01:06:26,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:26,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186588106] [2020-10-27 01:06:26,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:26,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:26,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:27,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:27,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 01:06:27,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:27,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 302 [2020-10-27 01:06:27,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:27,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:06:27,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:27,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 01:06:27,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:27,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:27,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:27,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:27,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:27,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:27,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:27,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:06:27,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:27,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:27,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:27,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:27,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:27,465 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:27,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186588106] [2020-10-27 01:06:27,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:27,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:06:27,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761599479] [2020-10-27 01:06:27,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:06:27,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:27,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:06:27,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:06:27,470 INFO L87 Difference]: Start difference. First operand 105 states and 118 transitions. Second operand 9 states. [2020-10-27 01:06:27,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:27,775 INFO L93 Difference]: Finished difference Result 108 states and 120 transitions. [2020-10-27 01:06:27,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:06:27,775 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-10-27 01:06:27,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:27,776 INFO L225 Difference]: With dead ends: 108 [2020-10-27 01:06:27,776 INFO L226 Difference]: Without dead ends: 104 [2020-10-27 01:06:27,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:06:27,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-27 01:06:27,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-10-27 01:06:27,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-27 01:06:27,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 116 transitions. [2020-10-27 01:06:27,785 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 116 transitions. Word has length 47 [2020-10-27 01:06:27,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:27,785 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 116 transitions. [2020-10-27 01:06:27,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:06:27,785 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 116 transitions. [2020-10-27 01:06:27,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 01:06:27,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:27,786 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:27,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:06:27,786 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:27,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:27,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1107089758, now seen corresponding path program 1 times [2020-10-27 01:06:27,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:27,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897889912] [2020-10-27 01:06:27,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:27,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:27,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:27,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:27,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 01:06:27,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:06:27,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-27 01:06:27,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:27,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:06:27,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 01:06:27,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:06:27,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:27,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:27,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:27,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:27,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:27,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:27,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:27,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:06:27,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:27,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:27,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:27,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:27,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:27,961 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 01:06:27,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1897889912] [2020-10-27 01:06:27,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:06:27,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:06:27,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650022014] [2020-10-27 01:06:27,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:06:27,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:27,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:06:27,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:06:27,967 INFO L87 Difference]: Start difference. First operand 104 states and 116 transitions. Second operand 4 states. [2020-10-27 01:06:28,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:28,137 INFO L93 Difference]: Finished difference Result 213 states and 239 transitions. [2020-10-27 01:06:28,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:06:28,140 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-10-27 01:06:28,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:28,141 INFO L225 Difference]: With dead ends: 213 [2020-10-27 01:06:28,141 INFO L226 Difference]: Without dead ends: 124 [2020-10-27 01:06:28,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:06:28,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-27 01:06:28,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 106. [2020-10-27 01:06:28,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-27 01:06:28,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 118 transitions. [2020-10-27 01:06:28,153 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 118 transitions. Word has length 47 [2020-10-27 01:06:28,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:28,153 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 118 transitions. [2020-10-27 01:06:28,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:06:28,153 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 118 transitions. [2020-10-27 01:06:28,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 01:06:28,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:28,154 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:28,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:06:28,154 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:28,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:28,155 INFO L82 PathProgramCache]: Analyzing trace with hash -127104064, now seen corresponding path program 1 times [2020-10-27 01:06:28,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:28,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1902479441] [2020-10-27 01:06:28,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:28,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:28,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:28,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:28,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 01:06:28,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:28,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 405 [2020-10-27 01:06:28,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:28,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:06:28,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:28,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 01:06:28,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:28,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:28,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:28,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:28,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:28,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:28,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:28,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:06:28,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:28,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:28,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:28,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:28,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:28,807 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:28,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1902479441] [2020-10-27 01:06:28,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:28,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:06:28,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48977254] [2020-10-27 01:06:28,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:06:28,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:28,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:06:28,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:06:28,814 INFO L87 Difference]: Start difference. First operand 106 states and 118 transitions. Second operand 9 states. [2020-10-27 01:06:29,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:29,325 INFO L93 Difference]: Finished difference Result 190 states and 209 transitions. [2020-10-27 01:06:29,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:06:29,325 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-10-27 01:06:29,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:29,327 INFO L225 Difference]: With dead ends: 190 [2020-10-27 01:06:29,327 INFO L226 Difference]: Without dead ends: 186 [2020-10-27 01:06:29,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:06:29,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-27 01:06:29,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 136. [2020-10-27 01:06:29,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-27 01:06:29,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 153 transitions. [2020-10-27 01:06:29,338 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 153 transitions. Word has length 50 [2020-10-27 01:06:29,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:29,338 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 153 transitions. [2020-10-27 01:06:29,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:06:29,338 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 153 transitions. [2020-10-27 01:06:29,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 01:06:29,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:29,340 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:29,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:06:29,340 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:29,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:29,340 INFO L82 PathProgramCache]: Analyzing trace with hash -2035219383, now seen corresponding path program 1 times [2020-10-27 01:06:29,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:29,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87072941] [2020-10-27 01:06:29,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:29,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 01:06:29,364 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 01:06:29,364 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 01:06:29,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:06:29,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 01:06:29 BoogieIcfgContainer [2020-10-27 01:06:29,390 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 01:06:29,393 INFO L168 Benchmark]: Toolchain (without parser) took 19518.01 ms. Allocated memory was 151.0 MB in the beginning and 450.9 MB in the end (delta: 299.9 MB). Free memory was 125.4 MB in the beginning and 210.3 MB in the end (delta: -84.9 MB). Peak memory consumption was 216.5 MB. Max. memory is 8.0 GB. [2020-10-27 01:06:29,393 INFO L168 Benchmark]: CDTParser took 0.57 ms. Allocated memory is still 151.0 MB. Free memory is still 123.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 01:06:29,393 INFO L168 Benchmark]: CACSL2BoogieTranslator took 515.08 ms. Allocated memory is still 151.0 MB. Free memory was 124.6 MB in the beginning and 101.9 MB in the end (delta: 22.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. [2020-10-27 01:06:29,394 INFO L168 Benchmark]: Boogie Preprocessor took 154.99 ms. Allocated memory is still 151.0 MB. Free memory was 101.9 MB in the beginning and 133.4 MB in the end (delta: -31.5 MB). Peak memory consumption was 6.8 MB. Max. memory is 8.0 GB. [2020-10-27 01:06:29,394 INFO L168 Benchmark]: RCFGBuilder took 994.93 ms. Allocated memory is still 151.0 MB. Free memory was 133.4 MB in the beginning and 80.8 MB in the end (delta: 52.6 MB). Peak memory consumption was 52.4 MB. Max. memory is 8.0 GB. [2020-10-27 01:06:29,395 INFO L168 Benchmark]: TraceAbstraction took 17839.00 ms. Allocated memory was 151.0 MB in the beginning and 450.9 MB in the end (delta: 299.9 MB). Free memory was 80.3 MB in the beginning and 210.3 MB in the end (delta: -130.0 MB). Peak memory consumption was 169.9 MB. Max. memory is 8.0 GB. [2020-10-27 01:06:29,397 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.57 ms. Allocated memory is still 151.0 MB. Free memory is still 123.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 515.08 ms. Allocated memory is still 151.0 MB. Free memory was 124.6 MB in the beginning and 101.9 MB in the end (delta: 22.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 154.99 ms. Allocated memory is still 151.0 MB. Free memory was 101.9 MB in the beginning and 133.4 MB in the end (delta: -31.5 MB). Peak memory consumption was 6.8 MB. Max. memory is 8.0 GB. * RCFGBuilder took 994.93 ms. Allocated memory is still 151.0 MB. Free memory was 133.4 MB in the beginning and 80.8 MB in the end (delta: 52.6 MB). Peak memory consumption was 52.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 17839.00 ms. Allocated memory was 151.0 MB in the beginning and 450.9 MB in the end (delta: 299.9 MB). Free memory was 80.3 MB in the beginning and 210.3 MB in the end (delta: -130.0 MB). Peak memory consumption was 169.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 985]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L996] SLL* head = malloc(sizeof(SLL)); [L997] head->next = ((void*)0) [L998] head->data = 0 [L999] SLL* item = head; [L1000] int status = 0; [L1002] COND TRUE __VERIFIER_nondet_int() [L1004] item->next = malloc(sizeof(SLL)) [L1005] EXPR item->next [L1005] item = item->next [L1006] item->next = ((void*)0) [L1008] COND TRUE !status [L1010] item->data = 1 [L1011] status = 1 [L1024] COND FALSE !(!(head != ((void*)0))) [L1025] COND FALSE !(!(item != ((void*)0))) [L1002] COND TRUE __VERIFIER_nondet_int() [L1004] item->next = malloc(sizeof(SLL)) [L1005] EXPR item->next [L1005] item = item->next [L1006] item->next = ((void*)0) [L1008] COND FALSE !(!status) [L1013] COND TRUE status == 1 [L1015] item->data = 2 [L1016] status = 2 [L1024] COND FALSE !(!(head != ((void*)0))) [L1025] COND FALSE !(!(item != ((void*)0))) [L1002] COND TRUE __VERIFIER_nondet_int() [L1004] item->next = malloc(sizeof(SLL)) [L1005] EXPR item->next [L1005] item = item->next [L1006] item->next = ((void*)0) [L1008] COND FALSE !(!status) [L1013] COND FALSE !(status == 1) [L1018] COND TRUE status >= 2 [L1020] item->data = 3 [L1021] status = 3 [L1024] COND FALSE !(!(head != ((void*)0))) [L1025] COND FALSE !(!(item != ((void*)0))) [L1002] COND FALSE !(__VERIFIER_nondet_int()) [L1028] COND FALSE !(!(head != ((void*)0))) [L1029] COND FALSE !(status == 1) [L1034] COND FALSE !(status == 2) [L1040] COND TRUE status == 3 [L1042] COND FALSE !(!(head != ((void*)0))) [L1043] EXPR head->next [L1043] COND FALSE !(!(head->next != ((void*)0))) [L1044] EXPR head->next [L1044] EXPR head->next->next [L1044] COND FALSE !(!(head->next->next != ((void*)0))) [L1045] EXPR head->next [L1045] EXPR head->next->next [L1045] EXPR head->next->next->next [L1045] COND FALSE !(!(head->next->next->next != ((void*)0))) [L1046] EXPR head->next [L1046] EXPR head->next->next [L1046] EXPR head->next->next->next [L1046] EXPR head->next->next->next->data [L1046] COND TRUE !(head->next->next->next->data != 3) [L1046] CALL reach_error() [L985] COND FALSE !(0) [L985] __assert_fail ("0", "sll-queue-2.c", 16, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 95 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 17.7s, OverallIterations: 24, TraceHistogramMax: 4, AutomataDifference: 7.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1513 SDtfs, 1314 SDslu, 3898 SDs, 0 SdLazy, 4197 SolverSat, 324 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 219 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=146occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 23 MinimizatonAttempts, 339 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 9.2s InterpolantComputationTime, 818 NumberOfCodeBlocks, 818 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 742 ConstructedInterpolants, 0 QuantifiedInterpolants, 404458 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 23 InterpolantComputations, 8 PerfectInterpolantSequences, 36/226 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...