/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-simple-white-blue-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:07:41,912 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:07:41,916 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:07:41,976 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:07:41,977 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:07:41,985 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:07:41,987 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:07:41,993 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:07:41,996 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:07:42,003 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:07:42,004 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:07:42,006 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:07:42,006 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:07:42,009 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:07:42,011 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:07:42,013 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:07:42,014 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:07:42,018 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:07:42,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:07:42,033 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:07:42,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:07:42,036 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:07:42,038 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:07:42,040 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:07:42,046 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:07:42,047 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:07:42,047 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:07:42,051 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:07:42,052 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:07:42,054 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:07:42,054 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:07:42,055 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:07:42,057 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:07:42,058 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:07:42,071 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:07:42,071 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:07:42,072 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:07:42,072 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:07:42,073 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:07:42,074 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:07:42,074 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:07:42,075 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 01:07:42,102 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:07:42,102 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:07:42,104 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:07:42,104 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:07:42,104 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:07:42,105 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:07:42,105 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:07:42,105 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:07:42,105 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:07:42,105 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:07:42,106 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:07:42,106 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:07:42,106 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:07:42,106 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:07:42,106 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:07:42,107 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:07:42,107 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:07:42,107 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:07:42,107 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:07:42,108 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:07:42,108 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:07:42,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:07:42,108 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:07:42,109 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:07:42,109 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:07:42,109 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:07:42,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:07:42,109 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:07:42,110 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:07:42,110 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:07:42,524 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:07:42,559 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:07:42,563 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:07:42,565 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:07:42,566 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:07:42,567 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-simple-white-blue-1.i [2020-10-27 01:07:42,639 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/877882749/71e631acd55240b2a81f125316042276/FLAG290a62ed5 [2020-10-27 01:07:43,385 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:07:43,386 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-simple-white-blue-1.i [2020-10-27 01:07:43,405 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/877882749/71e631acd55240b2a81f125316042276/FLAG290a62ed5 [2020-10-27 01:07:43,635 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/877882749/71e631acd55240b2a81f125316042276 [2020-10-27 01:07:43,640 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:07:43,648 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:07:43,651 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:07:43,651 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:07:43,656 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:07:43,656 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:07:43" (1/1) ... [2020-10-27 01:07:43,663 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fc2e663 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:07:43, skipping insertion in model container [2020-10-27 01:07:43,664 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:07:43" (1/1) ... [2020-10-27 01:07:43,672 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:07:43,743 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:07:44,064 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:07:44,089 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:07:44,146 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:07:44,220 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:07:44,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:07:44 WrapperNode [2020-10-27 01:07:44,221 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:07:44,222 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:07:44,223 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:07:44,223 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:07:44,265 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:07:44" (1/1) ... [2020-10-27 01:07:44,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:07:44" (1/1) ... [2020-10-27 01:07:44,301 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:07:44" (1/1) ... [2020-10-27 01:07:44,302 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:07:44" (1/1) ... [2020-10-27 01:07:44,355 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:07:44" (1/1) ... [2020-10-27 01:07:44,361 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:07:44" (1/1) ... [2020-10-27 01:07:44,365 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:07:44" (1/1) ... [2020-10-27 01:07:44,373 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:07:44,374 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:07:44,374 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:07:44,374 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:07:44,375 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:07:44" (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 01:07:44,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:07:44,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:07:44,469 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:07:44,469 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:07:44,469 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 01:07:44,469 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 01:07:44,469 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 01:07:44,470 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 01:07:44,470 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 01:07:44,470 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 01:07:44,470 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 01:07:44,470 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 01:07:44,470 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 01:07:44,471 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 01:07:44,471 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 01:07:44,471 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 01:07:44,471 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 01:07:44,471 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 01:07:44,471 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 01:07:44,472 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 01:07:44,472 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 01:07:44,472 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 01:07:44,472 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 01:07:44,472 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 01:07:44,472 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 01:07:44,472 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 01:07:44,473 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 01:07:44,473 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 01:07:44,473 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 01:07:44,473 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 01:07:44,473 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 01:07:44,473 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 01:07:44,473 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 01:07:44,474 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 01:07:44,474 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 01:07:44,474 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 01:07:44,474 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 01:07:44,474 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 01:07:44,474 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 01:07:44,475 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 01:07:44,475 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 01:07:44,475 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 01:07:44,475 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 01:07:44,475 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 01:07:44,475 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 01:07:44,476 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 01:07:44,476 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 01:07:44,476 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 01:07:44,476 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 01:07:44,476 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 01:07:44,477 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 01:07:44,477 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 01:07:44,477 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 01:07:44,477 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 01:07:44,477 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 01:07:44,477 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 01:07:44,478 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 01:07:44,478 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 01:07:44,478 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 01:07:44,478 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 01:07:44,478 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 01:07:44,478 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 01:07:44,479 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 01:07:44,479 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:07:44,479 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 01:07:44,479 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 01:07:44,479 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 01:07:44,479 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 01:07:44,480 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 01:07:44,480 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 01:07:44,480 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 01:07:44,480 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 01:07:44,480 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 01:07:44,480 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 01:07:44,480 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 01:07:44,481 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 01:07:44,481 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 01:07:44,481 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 01:07:44,481 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 01:07:44,481 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 01:07:44,481 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 01:07:44,482 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 01:07:44,482 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 01:07:44,482 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 01:07:44,482 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 01:07:44,482 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 01:07:44,482 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 01:07:44,482 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 01:07:44,483 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 01:07:44,483 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 01:07:44,483 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 01:07:44,483 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 01:07:44,483 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 01:07:44,483 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 01:07:44,484 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 01:07:44,484 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 01:07:44,484 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 01:07:44,484 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 01:07:44,484 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 01:07:44,484 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 01:07:44,485 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 01:07:44,485 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 01:07:44,485 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 01:07:44,485 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 01:07:44,485 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 01:07:44,485 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 01:07:44,486 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 01:07:44,486 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:07:44,486 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:07:44,486 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:07:44,486 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:07:44,486 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:07:44,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:07:44,487 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:07:44,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 01:07:44,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 01:07:44,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:07:44,487 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 01:07:44,487 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:07:44,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:07:44,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:07:44,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:07:44,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:07:45,347 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:07:45,348 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-27 01:07:45,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:07:45 BoogieIcfgContainer [2020-10-27 01:07:45,350 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:07:45,352 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:07:45,352 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:07:45,356 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:07:45,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:07:43" (1/3) ... [2020-10-27 01:07:45,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b624bbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:07:45, skipping insertion in model container [2020-10-27 01:07:45,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:07:44" (2/3) ... [2020-10-27 01:07:45,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b624bbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:07:45, skipping insertion in model container [2020-10-27 01:07:45,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:07:45" (3/3) ... [2020-10-27 01:07:45,359 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-simple-white-blue-1.i [2020-10-27 01:07:45,373 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:07:45,378 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:07:45,393 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:07:45,422 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:07:45,422 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:07:45,423 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:07:45,423 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:07:45,423 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:07:45,423 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:07:45,423 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:07:45,423 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:07:45,442 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-27 01:07:45,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 01:07:45,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:45,450 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:45,450 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:45,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:45,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1531111669, now seen corresponding path program 1 times [2020-10-27 01:07:45,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:45,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741785172] [2020-10-27 01:07:45,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:45,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:45,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:45,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:45,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:46,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:46,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 01:07:46,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:07:46,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 819 [2020-10-27 01:07:46,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:46,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:07:46,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:46,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:07:46,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:07:46,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:46,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:46,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:46,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:46,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:46,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:46,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 01:07:46,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:46,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:46,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:46,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:46,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:46,811 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 01:07:46,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741785172] [2020-10-27 01:07:46,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:07:46,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 01:07:46,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116905396] [2020-10-27 01:07:46,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:07:46,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:46,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:07:46,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:07:46,848 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 8 states. [2020-10-27 01:07:47,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:47,439 INFO L93 Difference]: Finished difference Result 91 states and 143 transitions. [2020-10-27 01:07:47,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:07:47,441 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-10-27 01:07:47,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:47,452 INFO L225 Difference]: With dead ends: 91 [2020-10-27 01:07:47,452 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 01:07:47,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:07:47,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 01:07:47,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-10-27 01:07:47,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 01:07:47,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-10-27 01:07:47,555 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 17 [2020-10-27 01:07:47,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:47,555 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-10-27 01:07:47,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:07:47,556 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-10-27 01:07:47,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:07:47,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:47,557 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] [2020-10-27 01:07:47,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:07:47,558 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:47,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:47,559 INFO L82 PathProgramCache]: Analyzing trace with hash 959444282, now seen corresponding path program 1 times [2020-10-27 01:07:47,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:47,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001315166] [2020-10-27 01:07:47,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:47,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:47,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:47,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:47,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:48,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:48,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:07:48,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:07:48,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 788 [2020-10-27 01:07:48,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:48,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:07:48,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:48,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:07:48,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:48,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:48,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:48,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:48,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:48,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:48,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:48,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:07:48,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:48,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:48,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:48,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:48,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:48,608 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 01:07:48,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001315166] [2020-10-27 01:07:48,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:48,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:07:48,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983074157] [2020-10-27 01:07:48,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:07:48,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:48,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:07:48,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:07:48,613 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 8 states. [2020-10-27 01:07:49,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:49,021 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2020-10-27 01:07:49,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:07:49,021 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-27 01:07:49,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:49,023 INFO L225 Difference]: With dead ends: 67 [2020-10-27 01:07:49,023 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 01:07:49,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:07:49,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 01:07:49,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 40. [2020-10-27 01:07:49,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 01:07:49,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2020-10-27 01:07:49,036 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 21 [2020-10-27 01:07:49,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:49,037 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2020-10-27 01:07:49,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:07:49,037 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2020-10-27 01:07:49,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:07:49,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:49,038 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] [2020-10-27 01:07:49,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:07:49,038 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:49,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:49,039 INFO L82 PathProgramCache]: Analyzing trace with hash -512838517, now seen corresponding path program 1 times [2020-10-27 01:07:49,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:49,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046242142] [2020-10-27 01:07:49,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:49,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:49,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:49,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:49,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:07:49,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:49,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-10-27 01:07:49,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:49,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:07:49,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:49,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:07:49,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:49,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:49,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:49,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:49,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:49,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:49,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:49,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:07:49,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:49,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:49,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:49,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:49,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:49,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:49,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046242142] [2020-10-27 01:07:49,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:49,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:07:49,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212081459] [2020-10-27 01:07:49,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:07:49,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:49,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:07:49,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:07:49,374 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 8 states. [2020-10-27 01:07:50,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:50,019 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2020-10-27 01:07:50,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:07:50,020 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-27 01:07:50,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:50,022 INFO L225 Difference]: With dead ends: 76 [2020-10-27 01:07:50,023 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 01:07:50,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:07:50,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 01:07:50,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 40. [2020-10-27 01:07:50,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 01:07:50,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-10-27 01:07:50,032 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 22 [2020-10-27 01:07:50,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:50,032 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-10-27 01:07:50,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:07:50,032 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-10-27 01:07:50,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:07:50,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:50,033 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] [2020-10-27 01:07:50,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:07:50,034 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:50,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:50,035 INFO L82 PathProgramCache]: Analyzing trace with hash -113395659, now seen corresponding path program 1 times [2020-10-27 01:07:50,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:50,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636509348] [2020-10-27 01:07:50,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:50,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:50,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:50,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:50,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:50,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:50,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:07:50,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:07:50,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 556 [2020-10-27 01:07:50,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:50,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:07:50,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:50,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:07:50,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:50,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:50,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:50,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:50,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:50,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:50,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:50,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:07:50,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:50,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:50,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:50,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:50,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:50,858 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 01:07:50,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636509348] [2020-10-27 01:07:50,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:07:50,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 01:07:50,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214709778] [2020-10-27 01:07:50,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:07:50,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:50,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:07:50,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:07:50,861 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 9 states. [2020-10-27 01:07:51,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:51,515 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2020-10-27 01:07:51,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:07:51,517 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-27 01:07:51,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:51,518 INFO L225 Difference]: With dead ends: 73 [2020-10-27 01:07:51,519 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 01:07:51,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:07:51,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 01:07:51,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 45. [2020-10-27 01:07:51,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 01:07:51,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2020-10-27 01:07:51,529 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 22 [2020-10-27 01:07:51,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:51,529 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2020-10-27 01:07:51,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:07:51,529 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2020-10-27 01:07:51,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:07:51,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:51,530 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:51,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:07:51,531 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:51,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:51,531 INFO L82 PathProgramCache]: Analyzing trace with hash -28778817, now seen corresponding path program 2 times [2020-10-27 01:07:51,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:51,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077030386] [2020-10-27 01:07:51,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:51,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:51,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:51,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:51,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:07:51,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:51,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-27 01:07:51,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:51,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:07:51,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 01:07:51,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:07:51,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:51,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:51,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:51,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:51,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:51,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:51,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:51,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:07:51,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:51,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:51,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:51,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:51,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:51,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:07:51,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077030386] [2020-10-27 01:07:51,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:07:51,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:07:51,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588711897] [2020-10-27 01:07:51,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:07:51,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:51,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:07:51,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:07:51,758 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand 6 states. [2020-10-27 01:07:51,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:51,953 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2020-10-27 01:07:51,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:07:51,953 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-27 01:07:51,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:51,954 INFO L225 Difference]: With dead ends: 61 [2020-10-27 01:07:51,955 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 01:07:51,955 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 01:07:51,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 01:07:51,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-10-27 01:07:51,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 01:07:51,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-10-27 01:07:51,963 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2020-10-27 01:07:51,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:51,964 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-10-27 01:07:51,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:07:51,964 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-10-27 01:07:51,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:07:51,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:51,965 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] [2020-10-27 01:07:51,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:07:51,966 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:51,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:51,966 INFO L82 PathProgramCache]: Analyzing trace with hash -235811078, now seen corresponding path program 1 times [2020-10-27 01:07:51,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:51,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680660013] [2020-10-27 01:07:51,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:51,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:51,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:52,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:52,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:07:52,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:52,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-10-27 01:07:52,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:52,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:07:52,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 01:07:52,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:07:52,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:52,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:52,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:52,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:52,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:52,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:52,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:52,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:07:52,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:52,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:52,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:52,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:52,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:52,225 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 01:07:52,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680660013] [2020-10-27 01:07:52,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:07:52,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 01:07:52,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025618713] [2020-10-27 01:07:52,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:07:52,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:52,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:07:52,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:07:52,229 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 7 states. [2020-10-27 01:07:52,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:52,513 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2020-10-27 01:07:52,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:07:52,514 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-27 01:07:52,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:52,515 INFO L225 Difference]: With dead ends: 74 [2020-10-27 01:07:52,516 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 01:07:52,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:07:52,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 01:07:52,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 52. [2020-10-27 01:07:52,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 01:07:52,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2020-10-27 01:07:52,526 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 24 [2020-10-27 01:07:52,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:52,526 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2020-10-27 01:07:52,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:07:52,526 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2020-10-27 01:07:52,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:07:52,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:52,528 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:52,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:07:52,528 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:52,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:52,529 INFO L82 PathProgramCache]: Analyzing trace with hash -165443440, now seen corresponding path program 1 times [2020-10-27 01:07:52,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:52,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999041365] [2020-10-27 01:07:52,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:52,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:52,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:52,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:52,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:07:52,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:52,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 253 [2020-10-27 01:07:52,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:52,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:07:52,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:52,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:07:52,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:53,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:53,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:53,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:53,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:53,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:53,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:53,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:07:53,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:53,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:53,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:53,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:53,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:53,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:53,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999041365] [2020-10-27 01:07:53,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:53,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:07:53,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860812369] [2020-10-27 01:07:53,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:07:53,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:53,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:07:53,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:07:53,106 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 10 states. [2020-10-27 01:07:53,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:53,951 INFO L93 Difference]: Finished difference Result 90 states and 109 transitions. [2020-10-27 01:07:53,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:07:53,952 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-27 01:07:53,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:53,953 INFO L225 Difference]: With dead ends: 90 [2020-10-27 01:07:53,953 INFO L226 Difference]: Without dead ends: 86 [2020-10-27 01:07:53,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:07:53,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-27 01:07:53,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 63. [2020-10-27 01:07:53,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 01:07:53,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2020-10-27 01:07:53,964 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 24 [2020-10-27 01:07:53,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:53,965 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2020-10-27 01:07:53,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:07:53,965 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2020-10-27 01:07:53,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:07:53,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:53,966 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] [2020-10-27 01:07:53,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:07:53,967 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:53,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:53,967 INFO L82 PathProgramCache]: Analyzing trace with hash 233999418, now seen corresponding path program 1 times [2020-10-27 01:07:53,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:53,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400349921] [2020-10-27 01:07:53,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:53,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:53,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:54,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:54,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:54,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:55,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:55,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:07:55,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:07:55,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1033 [2020-10-27 01:07:55,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:55,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:07:55,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:55,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:07:55,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:55,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:55,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:55,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:55,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:55,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:55,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:55,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:07:55,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:55,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:55,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:55,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:55,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:55,127 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 01:07:55,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400349921] [2020-10-27 01:07:55,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:55,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:07:55,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736761374] [2020-10-27 01:07:55,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:07:55,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:55,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:07:55,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:07:55,130 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand 7 states. [2020-10-27 01:07:55,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:55,451 INFO L93 Difference]: Finished difference Result 84 states and 100 transitions. [2020-10-27 01:07:55,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:07:55,452 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-27 01:07:55,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:55,453 INFO L225 Difference]: With dead ends: 84 [2020-10-27 01:07:55,453 INFO L226 Difference]: Without dead ends: 72 [2020-10-27 01:07:55,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:07:55,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-27 01:07:55,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2020-10-27 01:07:55,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-27 01:07:55,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2020-10-27 01:07:55,472 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 24 [2020-10-27 01:07:55,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:55,473 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2020-10-27 01:07:55,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:07:55,473 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2020-10-27 01:07:55,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:07:55,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:55,477 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 01:07:55,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:07:55,477 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:55,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:55,483 INFO L82 PathProgramCache]: Analyzing trace with hash -270769885, now seen corresponding path program 1 times [2020-10-27 01:07:55,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:55,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656968004] [2020-10-27 01:07:55,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:55,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:55,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:55,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:56,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:56,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:07:56,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:07:56,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 592 [2020-10-27 01:07:56,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:56,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:07:56,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:56,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:07:56,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:56,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:56,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:56,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:56,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:56,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:56,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:56,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:07:56,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:56,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:56,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:56,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:56,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:56,573 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 01:07:56,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656968004] [2020-10-27 01:07:56,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:56,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:07:56,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164586036] [2020-10-27 01:07:56,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:07:56,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:56,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:07:56,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:07:56,579 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand 11 states. [2020-10-27 01:07:57,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:57,443 INFO L93 Difference]: Finished difference Result 108 states and 134 transitions. [2020-10-27 01:07:57,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:07:57,444 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-10-27 01:07:57,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:57,446 INFO L225 Difference]: With dead ends: 108 [2020-10-27 01:07:57,447 INFO L226 Difference]: Without dead ends: 104 [2020-10-27 01:07:57,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:07:57,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-27 01:07:57,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-10-27 01:07:57,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 01:07:57,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 90 transitions. [2020-10-27 01:07:57,463 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 90 transitions. Word has length 25 [2020-10-27 01:07:57,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:57,463 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 90 transitions. [2020-10-27 01:07:57,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:07:57,464 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 90 transitions. [2020-10-27 01:07:57,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:07:57,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:57,465 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:57,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:07:57,465 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:57,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:57,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1326223531, now seen corresponding path program 2 times [2020-10-27 01:07:57,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:57,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104899043] [2020-10-27 01:07:57,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:57,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:57,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:57,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:57,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:07:57,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:57,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 282 [2020-10-27 01:07:57,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:57,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:07:57,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:57,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:07:57,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:58,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:58,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:58,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:58,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:58,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:58,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:58,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:07:58,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:58,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:58,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:58,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:58,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:07:58,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:58,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104899043] [2020-10-27 01:07:58,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:58,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:07:58,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791377734] [2020-10-27 01:07:58,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:07:58,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:58,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:07:58,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:07:58,263 INFO L87 Difference]: Start difference. First operand 74 states and 90 transitions. Second operand 11 states. [2020-10-27 01:07:58,977 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-10-27 01:07:59,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:59,714 INFO L93 Difference]: Finished difference Result 123 states and 152 transitions. [2020-10-27 01:07:59,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:07:59,715 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-27 01:07:59,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:59,716 INFO L225 Difference]: With dead ends: 123 [2020-10-27 01:07:59,716 INFO L226 Difference]: Without dead ends: 119 [2020-10-27 01:07:59,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:07:59,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-27 01:07:59,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 78. [2020-10-27 01:07:59,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 01:07:59,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 96 transitions. [2020-10-27 01:07:59,728 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 96 transitions. Word has length 26 [2020-10-27 01:07:59,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:59,728 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 96 transitions. [2020-10-27 01:07:59,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:07:59,728 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 96 transitions. [2020-10-27 01:07:59,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:07:59,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:59,729 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:59,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:07:59,730 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:59,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:59,730 INFO L82 PathProgramCache]: Analyzing trace with hash -926780673, now seen corresponding path program 2 times [2020-10-27 01:07:59,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:59,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377317877] [2020-10-27 01:07:59,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:59,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:59,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:59,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:59,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:00,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:01,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:01,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:08:01,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:08:01,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2045 [2020-10-27 01:08:01,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:01,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:08:01,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:01,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:08:01,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:01,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:01,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:01,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:01,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:01,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:01,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:01,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:08:01,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:01,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:01,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:01,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:01,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:01,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:01,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377317877] [2020-10-27 01:08:01,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:01,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:08:01,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902569062] [2020-10-27 01:08:01,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:08:01,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:01,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:08:01,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:08:01,935 INFO L87 Difference]: Start difference. First operand 78 states and 96 transitions. Second operand 8 states. [2020-10-27 01:08:02,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:02,398 INFO L93 Difference]: Finished difference Result 102 states and 121 transitions. [2020-10-27 01:08:02,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:08:02,398 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-10-27 01:08:02,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:02,399 INFO L225 Difference]: With dead ends: 102 [2020-10-27 01:08:02,400 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 01:08:02,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:08:02,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 01:08:02,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 78. [2020-10-27 01:08:02,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 01:08:02,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 95 transitions. [2020-10-27 01:08:02,414 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 95 transitions. Word has length 26 [2020-10-27 01:08:02,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:02,414 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 95 transitions. [2020-10-27 01:08:02,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:08:02,414 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 95 transitions. [2020-10-27 01:08:02,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:08:02,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:02,417 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:02,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:08:02,418 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:02,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:02,418 INFO L82 PathProgramCache]: Analyzing trace with hash 9165682, now seen corresponding path program 1 times [2020-10-27 01:08:02,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:02,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059005477] [2020-10-27 01:08:02,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:02,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:02,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:02,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:02,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:02,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:08:02,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:08:02,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 412 [2020-10-27 01:08:02,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:02,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:08:02,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:02,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:08:02,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:03,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:03,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:03,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:03,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:03,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:03,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:03,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:03,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:03,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:03,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:03,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:03,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:03,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:03,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059005477] [2020-10-27 01:08:03,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:03,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:08:03,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324969608] [2020-10-27 01:08:03,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:08:03,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:03,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:08:03,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:08:03,202 INFO L87 Difference]: Start difference. First operand 78 states and 95 transitions. Second operand 12 states. [2020-10-27 01:08:03,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:03,964 INFO L93 Difference]: Finished difference Result 110 states and 133 transitions. [2020-10-27 01:08:03,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:08:03,965 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-10-27 01:08:03,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:03,966 INFO L225 Difference]: With dead ends: 110 [2020-10-27 01:08:03,966 INFO L226 Difference]: Without dead ends: 95 [2020-10-27 01:08:03,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:08:03,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-27 01:08:03,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-10-27 01:08:03,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-27 01:08:03,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 97 transitions. [2020-10-27 01:08:03,983 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 97 transitions. Word has length 27 [2020-10-27 01:08:03,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:03,983 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 97 transitions. [2020-10-27 01:08:03,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:08:03,983 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 97 transitions. [2020-10-27 01:08:03,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:08:03,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:03,984 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:03,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:08:03,985 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:03,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:03,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1016701072, now seen corresponding path program 3 times [2020-10-27 01:08:03,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:03,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741796816] [2020-10-27 01:08:03,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:04,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:04,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:04,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:04,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:08:04,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:04,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-27 01:08:04,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:04,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:08:04,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:04,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:08:04,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:04,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:04,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:04,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:04,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:04,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:04,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:04,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:08:04,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:04,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:04,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:04,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:04,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:04,453 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:04,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741796816] [2020-10-27 01:08:04,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:04,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:08:04,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099402240] [2020-10-27 01:08:04,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:08:04,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:04,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:08:04,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:08:04,455 INFO L87 Difference]: Start difference. First operand 80 states and 97 transitions. Second operand 10 states. [2020-10-27 01:08:05,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:05,444 INFO L93 Difference]: Finished difference Result 112 states and 134 transitions. [2020-10-27 01:08:05,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:08:05,445 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-27 01:08:05,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:05,446 INFO L225 Difference]: With dead ends: 112 [2020-10-27 01:08:05,447 INFO L226 Difference]: Without dead ends: 94 [2020-10-27 01:08:05,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:08:05,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-27 01:08:05,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 80. [2020-10-27 01:08:05,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-27 01:08:05,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 96 transitions. [2020-10-27 01:08:05,457 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 96 transitions. Word has length 27 [2020-10-27 01:08:05,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:05,458 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 96 transitions. [2020-10-27 01:08:05,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:08:05,458 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 96 transitions. [2020-10-27 01:08:05,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:08:05,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:05,459 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:05,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:08:05,459 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:05,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:05,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1895214338, now seen corresponding path program 2 times [2020-10-27 01:08:05,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:05,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910715299] [2020-10-27 01:08:05,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:05,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:05,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:05,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:06,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:06,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:08:06,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:08:06,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 612 [2020-10-27 01:08:06,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:06,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:08:06,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:06,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:08:06,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:06,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:06,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:06,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:06,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:06,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:06,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:06,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:08:06,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:06,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:06,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:06,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:06,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:06,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:06,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910715299] [2020-10-27 01:08:06,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:06,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:08:06,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563653461] [2020-10-27 01:08:06,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:08:06,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:06,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:08:06,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:08:06,380 INFO L87 Difference]: Start difference. First operand 80 states and 96 transitions. Second operand 11 states. [2020-10-27 01:08:07,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:07,047 INFO L93 Difference]: Finished difference Result 118 states and 142 transitions. [2020-10-27 01:08:07,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:08:07,048 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-27 01:08:07,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:07,050 INFO L225 Difference]: With dead ends: 118 [2020-10-27 01:08:07,051 INFO L226 Difference]: Without dead ends: 114 [2020-10-27 01:08:07,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:08:07,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-27 01:08:07,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 83. [2020-10-27 01:08:07,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 01:08:07,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2020-10-27 01:08:07,059 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 27 [2020-10-27 01:08:07,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:07,059 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2020-10-27 01:08:07,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:08:07,060 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2020-10-27 01:08:07,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:08:07,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:07,060 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:07,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:08:07,061 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:07,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:07,061 INFO L82 PathProgramCache]: Analyzing trace with hash -519797483, now seen corresponding path program 1 times [2020-10-27 01:08:07,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:07,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173649186] [2020-10-27 01:08:07,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:07,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:07,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:07,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:07,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:08:07,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:07,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-27 01:08:07,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:07,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:08:07,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:07,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:08:07,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:07,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:07,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:07,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:07,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:07,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:07,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:07,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:08:07,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:07,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:07,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:07,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:07,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:07,266 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:08:07,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173649186] [2020-10-27 01:08:07,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:08:07,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:08:07,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624628951] [2020-10-27 01:08:07,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:08:07,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:07,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:08:07,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:08:07,269 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand 6 states. [2020-10-27 01:08:07,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:07,479 INFO L93 Difference]: Finished difference Result 93 states and 111 transitions. [2020-10-27 01:08:07,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:08:07,480 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-10-27 01:08:07,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:07,481 INFO L225 Difference]: With dead ends: 93 [2020-10-27 01:08:07,481 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 01:08:07,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:08:07,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 01:08:07,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-27 01:08:07,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 01:08:07,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2020-10-27 01:08:07,490 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 28 [2020-10-27 01:08:07,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:07,490 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2020-10-27 01:08:07,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:08:07,490 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2020-10-27 01:08:07,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:08:07,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:07,491 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:07,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:08:07,491 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:07,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:07,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1437295843, now seen corresponding path program 1 times [2020-10-27 01:08:07,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:07,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435734047] [2020-10-27 01:08:07,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:07,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:07,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:07,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:08,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:08,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:08:08,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:08:08,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 546 [2020-10-27 01:08:08,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:08,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:08:08,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:08,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:08:08,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:08:08,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:08,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:08,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:08,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:08,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:08,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:08,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:08:08,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:08,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:08,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:08,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:08,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:08,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:08,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435734047] [2020-10-27 01:08:08,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:08,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:08:08,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127136015] [2020-10-27 01:08:08,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:08:08,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:08,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:08:08,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:08:08,336 INFO L87 Difference]: Start difference. First operand 69 states and 83 transitions. Second operand 10 states. [2020-10-27 01:08:08,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:08,927 INFO L93 Difference]: Finished difference Result 99 states and 117 transitions. [2020-10-27 01:08:08,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:08:08,929 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-27 01:08:08,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:08,930 INFO L225 Difference]: With dead ends: 99 [2020-10-27 01:08:08,930 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 01:08:08,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:08:08,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 01:08:08,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 69. [2020-10-27 01:08:08,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 01:08:08,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2020-10-27 01:08:08,941 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 28 [2020-10-27 01:08:08,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:08,942 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2020-10-27 01:08:08,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:08:08,942 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2020-10-27 01:08:08,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:08:08,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:08,943 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:08,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:08:08,943 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:08,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:08,944 INFO L82 PathProgramCache]: Analyzing trace with hash -144394022, now seen corresponding path program 4 times [2020-10-27 01:08:08,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:08,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104214610] [2020-10-27 01:08:08,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:08,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:08,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:09,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:09,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:08:09,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:09,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 344 [2020-10-27 01:08:09,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:09,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:08:09,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:09,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:08:09,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:09,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:09,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:09,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:09,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:09,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:09,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:09,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:08:09,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:09,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:09,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:09,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:09,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:09,724 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:09,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104214610] [2020-10-27 01:08:09,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:09,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:08:09,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610147164] [2020-10-27 01:08:09,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:08:09,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:09,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:08:09,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:08:09,731 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand 12 states. [2020-10-27 01:08:11,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:11,056 INFO L93 Difference]: Finished difference Result 103 states and 123 transitions. [2020-10-27 01:08:11,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:08:11,057 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-27 01:08:11,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:11,058 INFO L225 Difference]: With dead ends: 103 [2020-10-27 01:08:11,058 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 01:08:11,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:08:11,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 01:08:11,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-10-27 01:08:11,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 01:08:11,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2020-10-27 01:08:11,070 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 28 [2020-10-27 01:08:11,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:11,070 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2020-10-27 01:08:11,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:08:11,071 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2020-10-27 01:08:11,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:08:11,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:11,071 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:11,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:08:11,072 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:11,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:11,072 INFO L82 PathProgramCache]: Analyzing trace with hash -2008825203, now seen corresponding path program 1 times [2020-10-27 01:08:11,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:11,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055220113] [2020-10-27 01:08:11,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:11,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:11,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:11,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:11,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:08:11,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:11,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 244 [2020-10-27 01:08:11,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:11,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:08:11,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:11,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:08:11,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:11,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:11,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:11,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:11,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:11,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:11,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:11,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:08:11,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:11,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:11,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:11,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:11,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:11,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:11,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055220113] [2020-10-27 01:08:11,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:11,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:08:11,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765042827] [2020-10-27 01:08:11,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:08:11,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:11,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:08:11,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:08:11,604 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand 11 states. [2020-10-27 01:08:12,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:12,232 INFO L93 Difference]: Finished difference Result 106 states and 128 transitions. [2020-10-27 01:08:12,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:08:12,233 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-27 01:08:12,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:12,234 INFO L225 Difference]: With dead ends: 106 [2020-10-27 01:08:12,234 INFO L226 Difference]: Without dead ends: 93 [2020-10-27 01:08:12,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:08:12,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-27 01:08:12,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 78. [2020-10-27 01:08:12,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 01:08:12,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2020-10-27 01:08:12,243 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 29 [2020-10-27 01:08:12,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:12,244 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2020-10-27 01:08:12,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:08:12,244 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2020-10-27 01:08:12,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:08:12,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:12,245 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:12,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:08:12,245 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:12,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:12,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1001289813, now seen corresponding path program 5 times [2020-10-27 01:08:12,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:12,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863538934] [2020-10-27 01:08:12,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:12,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:12,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:12,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:12,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:08:12,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:12,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 288 [2020-10-27 01:08:12,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:12,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:08:12,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:12,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:08:12,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:12,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:12,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:12,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:12,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:12,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:12,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:12,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:08:12,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:12,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:12,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:12,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:12,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:13,000 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:13,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863538934] [2020-10-27 01:08:13,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:13,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:08:13,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690433484] [2020-10-27 01:08:13,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:08:13,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:13,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:08:13,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:08:13,005 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand 12 states. [2020-10-27 01:08:14,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:14,458 INFO L93 Difference]: Finished difference Result 111 states and 133 transitions. [2020-10-27 01:08:14,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:08:14,459 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-10-27 01:08:14,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:14,460 INFO L225 Difference]: With dead ends: 111 [2020-10-27 01:08:14,460 INFO L226 Difference]: Without dead ends: 107 [2020-10-27 01:08:14,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:08:14,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-27 01:08:14,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2020-10-27 01:08:14,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-27 01:08:14,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 100 transitions. [2020-10-27 01:08:14,471 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 100 transitions. Word has length 29 [2020-10-27 01:08:14,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:14,471 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 100 transitions. [2020-10-27 01:08:14,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:08:14,472 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 100 transitions. [2020-10-27 01:08:14,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:08:14,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:14,472 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:14,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:08:14,473 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:14,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:14,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1404740701, now seen corresponding path program 1 times [2020-10-27 01:08:14,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:14,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883815346] [2020-10-27 01:08:14,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:14,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:14,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:14,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:14,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:16,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:16,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:08:16,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:08:16,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1929 [2020-10-27 01:08:16,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:16,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:08:16,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:16,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:08:16,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:16,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:16,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:16,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:16,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:16,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:16,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:16,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:08:16,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:16,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:16,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:16,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:16,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:16,609 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:16,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883815346] [2020-10-27 01:08:16,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:16,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:08:16,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195328452] [2020-10-27 01:08:16,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:08:16,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:16,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:08:16,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:08:16,611 INFO L87 Difference]: Start difference. First operand 85 states and 100 transitions. Second operand 9 states. [2020-10-27 01:08:17,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:17,095 INFO L93 Difference]: Finished difference Result 106 states and 126 transitions. [2020-10-27 01:08:17,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:08:17,096 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-10-27 01:08:17,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:17,097 INFO L225 Difference]: With dead ends: 106 [2020-10-27 01:08:17,097 INFO L226 Difference]: Without dead ends: 94 [2020-10-27 01:08:17,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:08:17,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-27 01:08:17,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2020-10-27 01:08:17,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-27 01:08:17,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2020-10-27 01:08:17,109 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 29 [2020-10-27 01:08:17,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:17,109 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2020-10-27 01:08:17,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:08:17,109 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2020-10-27 01:08:17,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:08:17,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:17,110 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:17,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:08:17,110 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:17,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:17,111 INFO L82 PathProgramCache]: Analyzing trace with hash 381762073, now seen corresponding path program 3 times [2020-10-27 01:08:17,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:17,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459552530] [2020-10-27 01:08:17,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:17,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:17,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:17,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:18,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:18,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:08:18,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:08:18,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 911 [2020-10-27 01:08:18,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:18,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:08:18,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:18,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:08:18,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:18,526 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2020-10-27 01:08:18,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:18,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:18,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:18,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:18,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:18,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:18,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:08:18,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:18,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:18,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:18,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:18,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:18,759 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:18,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1459552530] [2020-10-27 01:08:18,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:18,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:08:18,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843814462] [2020-10-27 01:08:18,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:08:18,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:18,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:08:18,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:08:18,761 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand 12 states. [2020-10-27 01:08:19,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:19,980 INFO L93 Difference]: Finished difference Result 106 states and 124 transitions. [2020-10-27 01:08:19,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:08:19,981 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-10-27 01:08:19,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:19,982 INFO L225 Difference]: With dead ends: 106 [2020-10-27 01:08:19,982 INFO L226 Difference]: Without dead ends: 102 [2020-10-27 01:08:19,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:08:19,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-27 01:08:19,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 83. [2020-10-27 01:08:19,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 01:08:19,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 98 transitions. [2020-10-27 01:08:19,996 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 98 transitions. Word has length 29 [2020-10-27 01:08:19,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:19,996 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 98 transitions. [2020-10-27 01:08:19,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:08:19,996 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 98 transitions. [2020-10-27 01:08:19,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:08:19,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:19,997 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:19,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:08:19,997 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:19,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:19,998 INFO L82 PathProgramCache]: Analyzing trace with hash 429496162, now seen corresponding path program 2 times [2020-10-27 01:08:19,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:19,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40079286] [2020-10-27 01:08:19,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:20,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:20,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:20,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:20,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:20,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:08:20,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:08:20,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 827 [2020-10-27 01:08:20,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:20,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:08:20,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:20,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:08:20,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:21,139 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2020-10-27 01:08:21,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:21,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:21,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:21,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:21,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:21,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:21,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:08:21,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:21,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:21,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:21,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:21,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:21,770 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:21,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40079286] [2020-10-27 01:08:21,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:21,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:08:21,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98298102] [2020-10-27 01:08:21,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:08:21,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:21,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:08:21,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:08:21,773 INFO L87 Difference]: Start difference. First operand 83 states and 98 transitions. Second operand 13 states. [2020-10-27 01:08:23,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:23,196 INFO L93 Difference]: Finished difference Result 134 states and 163 transitions. [2020-10-27 01:08:23,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:08:23,201 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-27 01:08:23,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:23,202 INFO L225 Difference]: With dead ends: 134 [2020-10-27 01:08:23,202 INFO L226 Difference]: Without dead ends: 130 [2020-10-27 01:08:23,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:08:23,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-27 01:08:23,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 94. [2020-10-27 01:08:23,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-27 01:08:23,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2020-10-27 01:08:23,216 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 30 [2020-10-27 01:08:23,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:23,216 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2020-10-27 01:08:23,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:08:23,217 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2020-10-27 01:08:23,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:08:23,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:23,217 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:23,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:08:23,218 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:23,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:23,218 INFO L82 PathProgramCache]: Analyzing trace with hash 467893978, now seen corresponding path program 1 times [2020-10-27 01:08:23,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:23,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18231483] [2020-10-27 01:08:23,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:23,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:23,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:23,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:24,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:24,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:08:24,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:08:24,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1114 [2020-10-27 01:08:24,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:24,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:08:24,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:24,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:08:24,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:25,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:25,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:25,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:25,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:25,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:25,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:25,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:25,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:25,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:25,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:25,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:25,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:25,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:08:25,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18231483] [2020-10-27 01:08:25,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:25,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:08:25,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126688563] [2020-10-27 01:08:25,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:08:25,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:25,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:08:25,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:08:25,115 INFO L87 Difference]: Start difference. First operand 94 states and 113 transitions. Second operand 12 states. [2020-10-27 01:08:26,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:26,344 INFO L93 Difference]: Finished difference Result 132 states and 158 transitions. [2020-10-27 01:08:26,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:08:26,347 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-27 01:08:26,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:26,348 INFO L225 Difference]: With dead ends: 132 [2020-10-27 01:08:26,349 INFO L226 Difference]: Without dead ends: 128 [2020-10-27 01:08:26,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:08:26,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-27 01:08:26,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 91. [2020-10-27 01:08:26,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 01:08:26,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2020-10-27 01:08:26,363 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 30 [2020-10-27 01:08:26,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:26,363 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2020-10-27 01:08:26,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:08:26,363 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2020-10-27 01:08:26,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:08:26,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:26,364 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:26,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:08:26,364 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:26,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:26,365 INFO L82 PathProgramCache]: Analyzing trace with hash -677469358, now seen corresponding path program 2 times [2020-10-27 01:08:26,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:26,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784385526] [2020-10-27 01:08:26,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:26,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:26,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:26,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:26,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:08:26,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:26,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 236 [2020-10-27 01:08:26,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:26,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:08:26,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:26,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:08:26,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:26,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:26,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:26,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:26,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:26,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:26,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:26,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:08:26,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:26,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:26,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:26,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:26,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:26,833 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:26,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784385526] [2020-10-27 01:08:26,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:26,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:08:26,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792219132] [2020-10-27 01:08:26,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:08:26,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:26,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:08:26,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:08:26,835 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand 11 states. [2020-10-27 01:08:27,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:27,459 INFO L93 Difference]: Finished difference Result 105 states and 124 transitions. [2020-10-27 01:08:27,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:08:27,460 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 01:08:27,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:27,462 INFO L225 Difference]: With dead ends: 105 [2020-10-27 01:08:27,462 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 01:08:27,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:08:27,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 01:08:27,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2020-10-27 01:08:27,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-27 01:08:27,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 101 transitions. [2020-10-27 01:08:27,474 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 101 transitions. Word has length 31 [2020-10-27 01:08:27,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:27,474 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 101 transitions. [2020-10-27 01:08:27,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:08:27,474 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 101 transitions. [2020-10-27 01:08:27,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:08:27,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:27,475 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:27,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:08:27,475 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:27,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:27,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1034687494, now seen corresponding path program 6 times [2020-10-27 01:08:27,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:27,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847499390] [2020-10-27 01:08:27,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:27,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:27,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:27,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:27,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:08:27,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:27,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 399 [2020-10-27 01:08:27,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:27,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:08:27,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:27,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:08:27,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:28,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:28,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:28,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:28,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:28,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:28,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:28,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:28,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:28,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:28,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:28,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:28,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:28,391 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:28,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847499390] [2020-10-27 01:08:28,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:28,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:08:28,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760953566] [2020-10-27 01:08:28,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:08:28,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:28,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:08:28,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:08:28,393 INFO L87 Difference]: Start difference. First operand 85 states and 101 transitions. Second operand 13 states. [2020-10-27 01:08:30,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:30,894 INFO L93 Difference]: Finished difference Result 142 states and 173 transitions. [2020-10-27 01:08:30,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 01:08:30,896 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-10-27 01:08:30,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:30,897 INFO L225 Difference]: With dead ends: 142 [2020-10-27 01:08:30,897 INFO L226 Difference]: Without dead ends: 138 [2020-10-27 01:08:30,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:08:30,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-27 01:08:30,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 89. [2020-10-27 01:08:30,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-27 01:08:30,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2020-10-27 01:08:30,911 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 31 [2020-10-27 01:08:30,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:30,911 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2020-10-27 01:08:30,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:08:30,911 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2020-10-27 01:08:30,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:08:30,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:30,912 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:30,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:08:30,912 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:30,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:30,913 INFO L82 PathProgramCache]: Analyzing trace with hash 631236606, now seen corresponding path program 2 times [2020-10-27 01:08:30,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:30,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488023959] [2020-10-27 01:08:30,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:30,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:30,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:31,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:31,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:33,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:33,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:08:33,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:08:33,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2064 [2020-10-27 01:08:33,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:33,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:08:33,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:33,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:08:33,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:33,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:33,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:33,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:33,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:33,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:33,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:33,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:33,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:33,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:33,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:33,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:33,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:33,231 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:33,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488023959] [2020-10-27 01:08:33,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:33,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:08:33,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297468516] [2020-10-27 01:08:33,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:08:33,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:33,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:08:33,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:08:33,233 INFO L87 Difference]: Start difference. First operand 89 states and 107 transitions. Second operand 10 states. [2020-10-27 01:08:33,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:33,730 INFO L93 Difference]: Finished difference Result 113 states and 135 transitions. [2020-10-27 01:08:33,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:08:33,731 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-27 01:08:33,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:33,732 INFO L225 Difference]: With dead ends: 113 [2020-10-27 01:08:33,732 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 01:08:33,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:08:33,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 01:08:33,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 91. [2020-10-27 01:08:33,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 01:08:33,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2020-10-27 01:08:33,745 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 31 [2020-10-27 01:08:33,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:33,746 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2020-10-27 01:08:33,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:08:33,746 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2020-10-27 01:08:33,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:08:33,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:33,747 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:33,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:08:33,747 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:33,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:33,747 INFO L82 PathProgramCache]: Analyzing trace with hash -346825985, now seen corresponding path program 3 times [2020-10-27 01:08:33,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:33,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1106888701] [2020-10-27 01:08:33,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:33,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:33,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:33,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:33,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:34,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:34,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:08:34,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:08:34,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1009 [2020-10-27 01:08:34,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:34,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:08:34,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:34,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:08:34,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:34,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:34,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:34,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:34,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:34,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:34,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:34,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:08:34,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:34,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:34,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:34,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:34,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:34,935 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:08:34,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1106888701] [2020-10-27 01:08:34,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:34,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:08:34,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713303445] [2020-10-27 01:08:34,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:08:34,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:34,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:08:34,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:08:34,938 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand 8 states. [2020-10-27 01:08:35,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:35,340 INFO L93 Difference]: Finished difference Result 108 states and 127 transitions. [2020-10-27 01:08:35,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:08:35,341 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-27 01:08:35,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:35,342 INFO L225 Difference]: With dead ends: 108 [2020-10-27 01:08:35,342 INFO L226 Difference]: Without dead ends: 80 [2020-10-27 01:08:35,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:08:35,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-27 01:08:35,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2020-10-27 01:08:35,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-27 01:08:35,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 90 transitions. [2020-10-27 01:08:35,352 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 90 transitions. Word has length 32 [2020-10-27 01:08:35,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:35,352 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 90 transitions. [2020-10-27 01:08:35,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:08:35,352 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 90 transitions. [2020-10-27 01:08:35,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:08:35,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:35,353 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:35,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:08:35,353 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:35,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:35,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1757182059, now seen corresponding path program 7 times [2020-10-27 01:08:35,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:35,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284788791] [2020-10-27 01:08:35,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:35,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:35,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:35,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:35,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:08:35,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:35,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 212 [2020-10-27 01:08:35,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:35,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:08:35,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:35,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:08:35,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:36,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:36,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:36,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:36,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:36,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:36,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:36,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:08:36,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:36,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:36,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:36,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:36,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:36,054 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:36,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284788791] [2020-10-27 01:08:36,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:36,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:08:36,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644072980] [2020-10-27 01:08:36,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:08:36,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:36,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:08:36,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:08:36,056 INFO L87 Difference]: Start difference. First operand 76 states and 90 transitions. Second operand 12 states. [2020-10-27 01:08:37,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:37,457 INFO L93 Difference]: Finished difference Result 110 states and 129 transitions. [2020-10-27 01:08:37,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:08:37,458 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-27 01:08:37,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:37,459 INFO L225 Difference]: With dead ends: 110 [2020-10-27 01:08:37,459 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 01:08:37,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:08:37,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 01:08:37,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 76. [2020-10-27 01:08:37,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-27 01:08:37,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 89 transitions. [2020-10-27 01:08:37,470 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 89 transitions. Word has length 32 [2020-10-27 01:08:37,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:37,470 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 89 transitions. [2020-10-27 01:08:37,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:08:37,470 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 89 transitions. [2020-10-27 01:08:37,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:08:37,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:37,471 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:37,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:08:37,471 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:37,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:37,472 INFO L82 PathProgramCache]: Analyzing trace with hash 37781599, now seen corresponding path program 1 times [2020-10-27 01:08:37,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:37,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272540238] [2020-10-27 01:08:37,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:37,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:37,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:37,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:37,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:08:37,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:37,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 345 [2020-10-27 01:08:37,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:37,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:08:37,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:37,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:08:37,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:38,164 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2020-10-27 01:08:38,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:38,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:38,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:38,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:38,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:38,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:38,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:08:38,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:38,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:38,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:38,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:38,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:38,363 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 01:08:38,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272540238] [2020-10-27 01:08:38,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:38,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:08:38,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554247800] [2020-10-27 01:08:38,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:08:38,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:38,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:08:38,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:08:38,366 INFO L87 Difference]: Start difference. First operand 76 states and 89 transitions. Second operand 13 states. [2020-10-27 01:08:39,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:39,276 INFO L93 Difference]: Finished difference Result 115 states and 136 transitions. [2020-10-27 01:08:39,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:08:39,277 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-27 01:08:39,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:39,278 INFO L225 Difference]: With dead ends: 115 [2020-10-27 01:08:39,278 INFO L226 Difference]: Without dead ends: 111 [2020-10-27 01:08:39,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:08:39,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-27 01:08:39,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 83. [2020-10-27 01:08:39,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 01:08:39,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2020-10-27 01:08:39,290 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 32 [2020-10-27 01:08:39,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:39,290 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2020-10-27 01:08:39,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:08:39,290 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2020-10-27 01:08:39,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:08:39,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:39,291 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:39,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:08:39,291 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:39,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:39,291 INFO L82 PathProgramCache]: Analyzing trace with hash -879716761, now seen corresponding path program 3 times [2020-10-27 01:08:39,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:39,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867547805] [2020-10-27 01:08:39,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:39,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:39,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:39,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:40,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:40,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:08:40,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:08:40,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 795 [2020-10-27 01:08:40,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:40,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:08:40,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:40,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:08:40,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:40,395 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2020-10-27 01:08:40,607 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-27 01:08:40,741 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2020-10-27 01:08:41,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:41,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:41,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:41,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:41,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:41,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:41,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:41,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:41,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:41,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:41,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:41,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:41,271 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:41,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867547805] [2020-10-27 01:08:41,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:41,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:08:41,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506762868] [2020-10-27 01:08:41,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:08:41,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:41,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:08:41,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:08:41,277 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand 14 states. [2020-10-27 01:08:42,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:42,880 INFO L93 Difference]: Finished difference Result 157 states and 190 transitions. [2020-10-27 01:08:42,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:08:42,881 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-10-27 01:08:42,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:42,883 INFO L225 Difference]: With dead ends: 157 [2020-10-27 01:08:42,883 INFO L226 Difference]: Without dead ends: 153 [2020-10-27 01:08:42,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:08:42,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-27 01:08:42,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 98. [2020-10-27 01:08:42,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-27 01:08:42,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 119 transitions. [2020-10-27 01:08:42,898 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 119 transitions. Word has length 32 [2020-10-27 01:08:42,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:42,898 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 119 transitions. [2020-10-27 01:08:42,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:08:42,899 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 119 transitions. [2020-10-27 01:08:42,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:08:42,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:42,899 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:42,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:08:42,900 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:42,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:42,900 INFO L82 PathProgramCache]: Analyzing trace with hash -841318945, now seen corresponding path program 2 times [2020-10-27 01:08:42,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:42,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234829881] [2020-10-27 01:08:42,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:42,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:42,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:43,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:43,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:43,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:08:43,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:08:43,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1062 [2020-10-27 01:08:43,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:43,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:08:43,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:43,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:08:43,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:44,228 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-10-27 01:08:44,351 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-10-27 01:08:44,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:45,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:45,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:45,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:45,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:45,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:45,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:45,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:45,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:45,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:45,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:45,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:45,013 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:08:45,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234829881] [2020-10-27 01:08:45,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:45,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:08:45,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672808932] [2020-10-27 01:08:45,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:08:45,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:45,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:08:45,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:08:45,015 INFO L87 Difference]: Start difference. First operand 98 states and 119 transitions. Second operand 13 states. [2020-10-27 01:08:45,292 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-10-27 01:08:45,507 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-27 01:08:45,699 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-27 01:08:46,465 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-10-27 01:08:46,667 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-10-27 01:08:46,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:46,785 INFO L93 Difference]: Finished difference Result 119 states and 143 transitions. [2020-10-27 01:08:46,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:08:46,786 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-27 01:08:46,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:46,787 INFO L225 Difference]: With dead ends: 119 [2020-10-27 01:08:46,788 INFO L226 Difference]: Without dead ends: 115 [2020-10-27 01:08:46,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:08:46,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-27 01:08:46,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 88. [2020-10-27 01:08:46,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-27 01:08:46,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 105 transitions. [2020-10-27 01:08:46,802 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 105 transitions. Word has length 32 [2020-10-27 01:08:46,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:46,802 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 105 transitions. [2020-10-27 01:08:46,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:08:46,803 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 105 transitions. [2020-10-27 01:08:46,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:08:46,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:46,803 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:46,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:08:46,804 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:46,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:46,804 INFO L82 PathProgramCache]: Analyzing trace with hash -467646338, now seen corresponding path program 4 times [2020-10-27 01:08:46,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:46,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745594671] [2020-10-27 01:08:46,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:46,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:46,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:46,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:47,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:47,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:08:47,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:08:47,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 499 [2020-10-27 01:08:47,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:47,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:08:47,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:47,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:08:47,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:48,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:48,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:48,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:48,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:48,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:48,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:48,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:48,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:48,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:48,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:48,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:48,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:48,029 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:48,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745594671] [2020-10-27 01:08:48,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:48,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:08:48,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729371233] [2020-10-27 01:08:48,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:08:48,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:48,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:08:48,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:08:48,031 INFO L87 Difference]: Start difference. First operand 88 states and 105 transitions. Second operand 13 states. [2020-10-27 01:08:49,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:49,825 INFO L93 Difference]: Finished difference Result 136 states and 163 transitions. [2020-10-27 01:08:49,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:08:49,826 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-27 01:08:49,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:49,828 INFO L225 Difference]: With dead ends: 136 [2020-10-27 01:08:49,828 INFO L226 Difference]: Without dead ends: 117 [2020-10-27 01:08:49,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:08:49,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-27 01:08:49,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 95. [2020-10-27 01:08:49,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 01:08:49,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 112 transitions. [2020-10-27 01:08:49,844 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 112 transitions. Word has length 33 [2020-10-27 01:08:49,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:49,844 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 112 transitions. [2020-10-27 01:08:49,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:08:49,844 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 112 transitions. [2020-10-27 01:08:49,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:08:49,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:49,845 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:49,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:08:49,845 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:49,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:49,846 INFO L82 PathProgramCache]: Analyzing trace with hash -896207455, now seen corresponding path program 8 times [2020-10-27 01:08:49,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:49,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117946101] [2020-10-27 01:08:49,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:49,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:49,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:50,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:50,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:08:50,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:50,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 360 [2020-10-27 01:08:50,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:50,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:08:50,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:50,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:08:50,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:50,494 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-10-27 01:08:50,651 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-10-27 01:08:51,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:51,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:51,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:51,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:51,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:51,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:51,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:08:51,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:51,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:51,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:51,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:51,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:51,161 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:51,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117946101] [2020-10-27 01:08:51,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:51,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:08:51,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277405764] [2020-10-27 01:08:51,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:08:51,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:51,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:08:51,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:08:51,164 INFO L87 Difference]: Start difference. First operand 95 states and 112 transitions. Second operand 14 states. [2020-10-27 01:08:53,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:53,353 INFO L93 Difference]: Finished difference Result 145 states and 175 transitions. [2020-10-27 01:08:53,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:08:53,354 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-10-27 01:08:53,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:53,356 INFO L225 Difference]: With dead ends: 145 [2020-10-27 01:08:53,356 INFO L226 Difference]: Without dead ends: 141 [2020-10-27 01:08:53,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:08:53,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-27 01:08:53,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 95. [2020-10-27 01:08:53,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 01:08:53,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 112 transitions. [2020-10-27 01:08:53,374 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 112 transitions. Word has length 33 [2020-10-27 01:08:53,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:53,374 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 112 transitions. [2020-10-27 01:08:53,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:08:53,374 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 112 transitions. [2020-10-27 01:08:53,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:08:53,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:53,375 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:53,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:08:53,375 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:53,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:53,376 INFO L82 PathProgramCache]: Analyzing trace with hash -983354204, now seen corresponding path program 2 times [2020-10-27 01:08:53,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:53,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303443532] [2020-10-27 01:08:53,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:53,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:53,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:53,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:53,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:54,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:54,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:08:54,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:08:54,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 800 [2020-10-27 01:08:54,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:54,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:08:54,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:54,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:08:54,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:54,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:54,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:54,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:54,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:54,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:54,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:54,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:08:54,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:54,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:54,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:54,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:54,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:54,621 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:54,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303443532] [2020-10-27 01:08:54,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:54,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:08:54,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278554412] [2020-10-27 01:08:54,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:08:54,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:54,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:08:54,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:08:54,623 INFO L87 Difference]: Start difference. First operand 95 states and 112 transitions. Second operand 12 states. [2020-10-27 01:08:55,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:55,722 INFO L93 Difference]: Finished difference Result 152 states and 178 transitions. [2020-10-27 01:08:55,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:08:55,723 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-27 01:08:55,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:55,725 INFO L225 Difference]: With dead ends: 152 [2020-10-27 01:08:55,725 INFO L226 Difference]: Without dead ends: 142 [2020-10-27 01:08:55,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:08:55,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-27 01:08:55,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 107. [2020-10-27 01:08:55,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-27 01:08:55,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 128 transitions. [2020-10-27 01:08:55,744 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 128 transitions. Word has length 34 [2020-10-27 01:08:55,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:55,744 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 128 transitions. [2020-10-27 01:08:55,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:08:55,744 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 128 transitions. [2020-10-27 01:08:55,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:08:55,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:55,745 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:55,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:08:55,745 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:55,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:55,746 INFO L82 PathProgramCache]: Analyzing trace with hash -75027260, now seen corresponding path program 4 times [2020-10-27 01:08:55,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:55,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014354150] [2020-10-27 01:08:55,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:55,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:55,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:56,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:56,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:08:56,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:56,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 315 [2020-10-27 01:08:56,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:56,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:08:56,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:56,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:08:56,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:56,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:56,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:56,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:56,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:56,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:56,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:56,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:56,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:56,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:56,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:56,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:56,577 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:56,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014354150] [2020-10-27 01:08:56,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:56,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:08:56,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287557416] [2020-10-27 01:08:56,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:08:56,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:56,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:08:56,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:08:56,579 INFO L87 Difference]: Start difference. First operand 107 states and 128 transitions. Second operand 13 states. [2020-10-27 01:08:57,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:57,838 INFO L93 Difference]: Finished difference Result 134 states and 161 transitions. [2020-10-27 01:08:57,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:08:57,839 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-27 01:08:57,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:57,841 INFO L225 Difference]: With dead ends: 134 [2020-10-27 01:08:57,841 INFO L226 Difference]: Without dead ends: 126 [2020-10-27 01:08:57,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:08:57,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-27 01:08:57,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 114. [2020-10-27 01:08:57,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-27 01:08:57,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 137 transitions. [2020-10-27 01:08:57,868 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 137 transitions. Word has length 34 [2020-10-27 01:08:57,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:57,868 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 137 transitions. [2020-10-27 01:08:57,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:08:57,868 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 137 transitions. [2020-10-27 01:08:57,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:08:57,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:57,869 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:57,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:08:57,869 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:57,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:57,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1485383334, now seen corresponding path program 9 times [2020-10-27 01:08:57,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:57,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214906589] [2020-10-27 01:08:57,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:57,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:57,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:58,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:58,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:08:58,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:58,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 449 [2020-10-27 01:08:58,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:58,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:08:58,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:58,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:08:58,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:58,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:58,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:58,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:58,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:58,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:58,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:58,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:58,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:58,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:58,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:58,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:58,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:58,845 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:58,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214906589] [2020-10-27 01:08:58,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:58,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:08:58,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734166644] [2020-10-27 01:08:58,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:08:58,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:58,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:08:58,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:08:58,847 INFO L87 Difference]: Start difference. First operand 114 states and 137 transitions. Second operand 14 states. [2020-10-27 01:09:00,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:00,767 INFO L93 Difference]: Finished difference Result 146 states and 174 transitions. [2020-10-27 01:09:00,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:09:00,768 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-27 01:09:00,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:00,769 INFO L225 Difference]: With dead ends: 146 [2020-10-27 01:09:00,769 INFO L226 Difference]: Without dead ends: 142 [2020-10-27 01:09:00,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:09:00,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-27 01:09:00,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 121. [2020-10-27 01:09:00,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-27 01:09:00,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 144 transitions. [2020-10-27 01:09:00,791 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 144 transitions. Word has length 34 [2020-10-27 01:09:00,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:00,791 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 144 transitions. [2020-10-27 01:09:00,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:09:00,792 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 144 transitions. [2020-10-27 01:09:00,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:09:00,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:00,792 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:00,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:09:00,793 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:00,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:00,793 INFO L82 PathProgramCache]: Analyzing trace with hash 309580324, now seen corresponding path program 3 times [2020-10-27 01:09:00,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:00,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589102233] [2020-10-27 01:09:00,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:00,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:00,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:01,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:01,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:09:01,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:01,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 330 [2020-10-27 01:09:01,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:01,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:09:01,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:01,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:09:01,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:01,581 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2020-10-27 01:09:01,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:01,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:01,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:01,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:01,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:01,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:01,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:09:01,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:01,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:01,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:01,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:01,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:01,838 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:01,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589102233] [2020-10-27 01:09:01,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:01,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:09:01,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487889048] [2020-10-27 01:09:01,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:09:01,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:01,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:09:01,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:09:01,840 INFO L87 Difference]: Start difference. First operand 121 states and 144 transitions. Second operand 14 states. [2020-10-27 01:09:02,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:02,907 INFO L93 Difference]: Finished difference Result 148 states and 174 transitions. [2020-10-27 01:09:02,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:09:02,908 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-27 01:09:02,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:02,910 INFO L225 Difference]: With dead ends: 148 [2020-10-27 01:09:02,910 INFO L226 Difference]: Without dead ends: 144 [2020-10-27 01:09:02,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:09:02,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-27 01:09:02,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 121. [2020-10-27 01:09:02,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-27 01:09:02,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 144 transitions. [2020-10-27 01:09:02,926 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 144 transitions. Word has length 34 [2020-10-27 01:09:02,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:02,926 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 144 transitions. [2020-10-27 01:09:02,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:09:02,926 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 144 transitions. [2020-10-27 01:09:02,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:09:02,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:02,927 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 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 01:09:02,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:09:02,927 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:02,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:02,928 INFO L82 PathProgramCache]: Analyzing trace with hash -607918036, now seen corresponding path program 5 times [2020-10-27 01:09:02,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:02,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55944743] [2020-10-27 01:09:02,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:02,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:02,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:03,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:03,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:03,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:09:03,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:09:03,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1019 [2020-10-27 01:09:03,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:03,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:09:03,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:03,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:09:03,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:04,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:04,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:04,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:04,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:04,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:04,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:04,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:09:04,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:04,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:04,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:04,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:04,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:04,530 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:04,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55944743] [2020-10-27 01:09:04,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:04,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:09:04,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754115624] [2020-10-27 01:09:04,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:09:04,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:04,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:09:04,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:09:04,537 INFO L87 Difference]: Start difference. First operand 121 states and 144 transitions. Second operand 14 states. [2020-10-27 01:09:05,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:05,603 INFO L93 Difference]: Finished difference Result 152 states and 180 transitions. [2020-10-27 01:09:05,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:09:05,604 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-27 01:09:05,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:05,605 INFO L225 Difference]: With dead ends: 152 [2020-10-27 01:09:05,605 INFO L226 Difference]: Without dead ends: 148 [2020-10-27 01:09:05,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:09:05,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-27 01:09:05,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 119. [2020-10-27 01:09:05,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-27 01:09:05,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 142 transitions. [2020-10-27 01:09:05,628 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 142 transitions. Word has length 34 [2020-10-27 01:09:05,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:05,628 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 142 transitions. [2020-10-27 01:09:05,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:09:05,628 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 142 transitions. [2020-10-27 01:09:05,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:09:05,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:05,629 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 01:09:05,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 01:09:05,629 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:05,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:05,629 INFO L82 PathProgramCache]: Analyzing trace with hash -610049439, now seen corresponding path program 1 times [2020-10-27 01:09:05,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:05,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093909688] [2020-10-27 01:09:05,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:05,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:05,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:05,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:05,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:09:05,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:05,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 264 [2020-10-27 01:09:05,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:05,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:09:05,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:05,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:09:05,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:06,177 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 30 [2020-10-27 01:09:06,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:06,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:06,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:06,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:06,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:06,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:06,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:09:06,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:06,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:06,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:06,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:06,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:06,436 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:06,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093909688] [2020-10-27 01:09:06,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:06,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:09:06,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877171792] [2020-10-27 01:09:06,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:09:06,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:06,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:09:06,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:09:06,437 INFO L87 Difference]: Start difference. First operand 119 states and 142 transitions. Second operand 13 states. [2020-10-27 01:09:07,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:07,303 INFO L93 Difference]: Finished difference Result 138 states and 163 transitions. [2020-10-27 01:09:07,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:09:07,303 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-27 01:09:07,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:07,304 INFO L225 Difference]: With dead ends: 138 [2020-10-27 01:09:07,305 INFO L226 Difference]: Without dead ends: 120 [2020-10-27 01:09:07,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:09:07,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-27 01:09:07,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 115. [2020-10-27 01:09:07,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-27 01:09:07,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 137 transitions. [2020-10-27 01:09:07,326 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 137 transitions. Word has length 35 [2020-10-27 01:09:07,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:07,326 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 137 transitions. [2020-10-27 01:09:07,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:09:07,326 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 137 transitions. [2020-10-27 01:09:07,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:09:07,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:07,327 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:07,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 01:09:07,328 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:07,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:07,328 INFO L82 PathProgramCache]: Analyzing trace with hash -631820455, now seen corresponding path program 6 times [2020-10-27 01:09:07,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:07,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935393910] [2020-10-27 01:09:07,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:07,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:07,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:07,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:08,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:08,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:09:08,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:09:08,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-10-27 01:09:08,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:08,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:09:08,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:08,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:09:08,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:08,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:08,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:08,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:08,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:08,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:08,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:08,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:09:08,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:08,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:08,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:08,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:08,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:08,851 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:08,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935393910] [2020-10-27 01:09:08,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:08,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:09:08,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032217189] [2020-10-27 01:09:08,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:09:08,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:08,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:09:08,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:09:08,853 INFO L87 Difference]: Start difference. First operand 115 states and 137 transitions. Second operand 14 states. [2020-10-27 01:09:10,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:10,359 INFO L93 Difference]: Finished difference Result 145 states and 172 transitions. [2020-10-27 01:09:10,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:09:10,360 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-27 01:09:10,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:10,360 INFO L225 Difference]: With dead ends: 145 [2020-10-27 01:09:10,361 INFO L226 Difference]: Without dead ends: 141 [2020-10-27 01:09:10,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:09:10,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-27 01:09:10,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 116. [2020-10-27 01:09:10,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-27 01:09:10,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 138 transitions. [2020-10-27 01:09:10,393 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 138 transitions. Word has length 35 [2020-10-27 01:09:10,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:10,393 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 138 transitions. [2020-10-27 01:09:10,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:09:10,393 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 138 transitions. [2020-10-27 01:09:10,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:09:10,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:10,394 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:10,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 01:09:10,394 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:10,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:10,395 INFO L82 PathProgramCache]: Analyzing trace with hash -2018485303, now seen corresponding path program 5 times [2020-10-27 01:09:10,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:10,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900796758] [2020-10-27 01:09:10,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:10,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:10,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:10,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:10,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:09:10,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:10,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 299 [2020-10-27 01:09:10,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:10,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:09:10,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:10,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:09:10,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:11,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:11,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:11,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:11,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:11,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:11,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:11,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:09:11,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:11,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:11,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:11,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:11,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:11,199 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:11,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900796758] [2020-10-27 01:09:11,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:11,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:09:11,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259633412] [2020-10-27 01:09:11,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:09:11,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:11,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:09:11,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:09:11,201 INFO L87 Difference]: Start difference. First operand 116 states and 138 transitions. Second operand 14 states. [2020-10-27 01:09:12,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:12,069 INFO L93 Difference]: Finished difference Result 148 states and 176 transitions. [2020-10-27 01:09:12,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:09:12,070 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-27 01:09:12,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:12,072 INFO L225 Difference]: With dead ends: 148 [2020-10-27 01:09:12,072 INFO L226 Difference]: Without dead ends: 139 [2020-10-27 01:09:12,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:09:12,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-27 01:09:12,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 118. [2020-10-27 01:09:12,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-27 01:09:12,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 140 transitions. [2020-10-27 01:09:12,095 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 140 transitions. Word has length 36 [2020-10-27 01:09:12,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:12,095 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 140 transitions. [2020-10-27 01:09:12,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:09:12,096 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 140 transitions. [2020-10-27 01:09:12,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:09:12,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:12,096 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:12,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 01:09:12,097 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:12,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:12,097 INFO L82 PathProgramCache]: Analyzing trace with hash -869457591, now seen corresponding path program 6 times [2020-10-27 01:09:12,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:12,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546313787] [2020-10-27 01:09:12,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:12,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:12,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:12,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:13,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:13,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:09:13,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:09:13,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 968 [2020-10-27 01:09:13,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:13,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:09:13,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:13,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:09:13,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:13,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:13,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:13,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:13,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:13,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:13,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:13,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:09:13,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:13,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:13,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:13,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:13,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:13,904 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:13,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546313787] [2020-10-27 01:09:13,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:13,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:09:13,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120186716] [2020-10-27 01:09:13,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:09:13,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:13,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:09:13,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:09:13,905 INFO L87 Difference]: Start difference. First operand 118 states and 140 transitions. Second operand 14 states. [2020-10-27 01:09:15,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:15,143 INFO L93 Difference]: Finished difference Result 172 states and 205 transitions. [2020-10-27 01:09:15,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:09:15,144 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-27 01:09:15,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:15,145 INFO L225 Difference]: With dead ends: 172 [2020-10-27 01:09:15,145 INFO L226 Difference]: Without dead ends: 164 [2020-10-27 01:09:15,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:09:15,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-27 01:09:15,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 132. [2020-10-27 01:09:15,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-27 01:09:15,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 160 transitions. [2020-10-27 01:09:15,165 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 160 transitions. Word has length 36 [2020-10-27 01:09:15,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:15,165 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 160 transitions. [2020-10-27 01:09:15,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:09:15,165 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 160 transitions. [2020-10-27 01:09:15,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:09:15,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:15,166 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:15,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 01:09:15,166 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:15,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:15,167 INFO L82 PathProgramCache]: Analyzing trace with hash 2015153631, now seen corresponding path program 10 times [2020-10-27 01:09:15,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:15,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635075345] [2020-10-27 01:09:15,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:15,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:15,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:15,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:15,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:09:15,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:15,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 413 [2020-10-27 01:09:15,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:15,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:09:15,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:15,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:09:15,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:15,878 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-27 01:09:16,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:16,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:16,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:16,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:16,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:16,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:16,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:09:16,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:16,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:16,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:16,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:16,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:16,248 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:16,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635075345] [2020-10-27 01:09:16,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:16,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:09:16,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541939751] [2020-10-27 01:09:16,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:09:16,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:16,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:09:16,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:09:16,250 INFO L87 Difference]: Start difference. First operand 132 states and 160 transitions. Second operand 15 states. [2020-10-27 01:09:19,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:19,194 INFO L93 Difference]: Finished difference Result 200 states and 243 transitions. [2020-10-27 01:09:19,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 01:09:19,195 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-27 01:09:19,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:19,197 INFO L225 Difference]: With dead ends: 200 [2020-10-27 01:09:19,197 INFO L226 Difference]: Without dead ends: 196 [2020-10-27 01:09:19,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:09:19,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-27 01:09:19,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 136. [2020-10-27 01:09:19,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-27 01:09:19,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 166 transitions. [2020-10-27 01:09:19,223 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 166 transitions. Word has length 36 [2020-10-27 01:09:19,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:19,223 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 166 transitions. [2020-10-27 01:09:19,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:09:19,223 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 166 transitions. [2020-10-27 01:09:19,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:09:19,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:19,224 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:19,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 01:09:19,224 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:19,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:19,225 INFO L82 PathProgramCache]: Analyzing trace with hash -484850007, now seen corresponding path program 4 times [2020-10-27 01:09:19,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:19,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139743144] [2020-10-27 01:09:19,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:19,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:19,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:19,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:19,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:09:19,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:19,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 431 [2020-10-27 01:09:19,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:19,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:09:19,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:19,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:09:19,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:19,962 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-10-27 01:09:20,107 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-27 01:09:20,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:20,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:20,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:20,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:20,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:20,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:20,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:09:20,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:20,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:20,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:20,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:20,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:20,567 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:20,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139743144] [2020-10-27 01:09:20,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:20,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:09:20,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663064840] [2020-10-27 01:09:20,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:09:20,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:20,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:09:20,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:09:20,569 INFO L87 Difference]: Start difference. First operand 136 states and 166 transitions. Second operand 15 states. [2020-10-27 01:09:21,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:21,732 INFO L93 Difference]: Finished difference Result 163 states and 194 transitions. [2020-10-27 01:09:21,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:09:21,733 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-27 01:09:21,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:21,735 INFO L225 Difference]: With dead ends: 163 [2020-10-27 01:09:21,735 INFO L226 Difference]: Without dead ends: 159 [2020-10-27 01:09:21,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:09:21,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-27 01:09:21,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 130. [2020-10-27 01:09:21,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-27 01:09:21,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 159 transitions. [2020-10-27 01:09:21,758 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 159 transitions. Word has length 36 [2020-10-27 01:09:21,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:21,759 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 159 transitions. [2020-10-27 01:09:21,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:09:21,759 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 159 transitions. [2020-10-27 01:09:21,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:09:21,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:21,759 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:21,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 01:09:21,760 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:21,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:21,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1031352680, now seen corresponding path program 7 times [2020-10-27 01:09:21,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:21,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153999987] [2020-10-27 01:09:21,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:21,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:21,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:21,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:22,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:23,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:23,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:09:23,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:09:23,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1586 [2020-10-27 01:09:23,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:23,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:09:23,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:23,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:09:23,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:23,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:23,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:23,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:23,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:23,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:23,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:23,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:09:23,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:23,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:23,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:23,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:23,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:23,988 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:23,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153999987] [2020-10-27 01:09:23,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:23,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:09:23,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911546105] [2020-10-27 01:09:23,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:09:23,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:23,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:09:23,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:09:23,989 INFO L87 Difference]: Start difference. First operand 130 states and 159 transitions. Second operand 15 states. [2020-10-27 01:09:24,317 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2020-10-27 01:09:24,489 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-10-27 01:09:24,864 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-10-27 01:09:25,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:25,969 INFO L93 Difference]: Finished difference Result 161 states and 196 transitions. [2020-10-27 01:09:25,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:09:25,970 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-10-27 01:09:25,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:25,972 INFO L225 Difference]: With dead ends: 161 [2020-10-27 01:09:25,972 INFO L226 Difference]: Without dead ends: 157 [2020-10-27 01:09:25,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:09:25,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-27 01:09:26,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 137. [2020-10-27 01:09:26,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-27 01:09:26,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 168 transitions. [2020-10-27 01:09:26,001 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 168 transitions. Word has length 37 [2020-10-27 01:09:26,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:26,001 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 168 transitions. [2020-10-27 01:09:26,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:09:26,001 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 168 transitions. [2020-10-27 01:09:26,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:09:26,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:26,002 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:26,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 01:09:26,002 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:26,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:26,003 INFO L82 PathProgramCache]: Analyzing trace with hash -887086202, now seen corresponding path program 11 times [2020-10-27 01:09:26,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:26,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67417680] [2020-10-27 01:09:26,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:26,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:26,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:26,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:26,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:09:26,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:26,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 293 [2020-10-27 01:09:26,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:26,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:09:26,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:26,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:09:26,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:26,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:26,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:26,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:26,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:26,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:26,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:26,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:09:26,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:26,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:26,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:26,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:26,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:26,985 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:26,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67417680] [2020-10-27 01:09:26,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:26,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:09:26,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859483570] [2020-10-27 01:09:26,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:09:26,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:26,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:09:26,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:09:26,986 INFO L87 Difference]: Start difference. First operand 137 states and 168 transitions. Second operand 14 states. [2020-10-27 01:09:27,953 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-10-27 01:09:29,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:29,491 INFO L93 Difference]: Finished difference Result 172 states and 207 transitions. [2020-10-27 01:09:29,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:09:29,492 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-10-27 01:09:29,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:29,494 INFO L225 Difference]: With dead ends: 172 [2020-10-27 01:09:29,494 INFO L226 Difference]: Without dead ends: 148 [2020-10-27 01:09:29,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:09:29,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-27 01:09:29,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 137. [2020-10-27 01:09:29,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-27 01:09:29,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 167 transitions. [2020-10-27 01:09:29,527 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 167 transitions. Word has length 37 [2020-10-27 01:09:29,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:29,527 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 167 transitions. [2020-10-27 01:09:29,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:09:29,528 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 167 transitions. [2020-10-27 01:09:29,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:09:29,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:29,528 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:29,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 01:09:29,528 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:29,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:29,529 INFO L82 PathProgramCache]: Analyzing trace with hash 532414076, now seen corresponding path program 2 times [2020-10-27 01:09:29,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:29,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143002546] [2020-10-27 01:09:29,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:29,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:29,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:30,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:30,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:09:30,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:30,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 451 [2020-10-27 01:09:30,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:30,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:09:30,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:30,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:09:30,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:30,256 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-10-27 01:09:30,423 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-10-27 01:09:30,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:30,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:30,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:30,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:30,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:30,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:30,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:09:30,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:30,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:30,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:30,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:30,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:30,731 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:30,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143002546] [2020-10-27 01:09:30,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:30,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:09:30,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001054848] [2020-10-27 01:09:30,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:09:30,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:30,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:09:30,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:09:30,732 INFO L87 Difference]: Start difference. First operand 137 states and 167 transitions. Second operand 15 states. [2020-10-27 01:09:32,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:32,193 INFO L93 Difference]: Finished difference Result 170 states and 204 transitions. [2020-10-27 01:09:32,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:09:32,194 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-10-27 01:09:32,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:32,195 INFO L225 Difference]: With dead ends: 170 [2020-10-27 01:09:32,196 INFO L226 Difference]: Without dead ends: 166 [2020-10-27 01:09:32,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:09:32,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-27 01:09:32,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 141. [2020-10-27 01:09:32,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-27 01:09:32,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 172 transitions. [2020-10-27 01:09:32,226 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 172 transitions. Word has length 37 [2020-10-27 01:09:32,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:32,227 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 172 transitions. [2020-10-27 01:09:32,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:09:32,227 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 172 transitions. [2020-10-27 01:09:32,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:09:32,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:32,227 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:32,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 01:09:32,228 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:32,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:32,228 INFO L82 PathProgramCache]: Analyzing trace with hash 510643060, now seen corresponding path program 7 times [2020-10-27 01:09:32,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:32,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580435261] [2020-10-27 01:09:32,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:32,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:32,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:32,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:33,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:33,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:09:33,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:09:33,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1042 [2020-10-27 01:09:33,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:33,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:09:33,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:33,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:09:33,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:33,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:33,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:33,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:33,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:33,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:33,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:33,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:09:33,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:33,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:33,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:33,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:33,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:33,942 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:33,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580435261] [2020-10-27 01:09:33,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:33,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:09:33,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4997347] [2020-10-27 01:09:33,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:09:33,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:33,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:09:33,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:09:33,943 INFO L87 Difference]: Start difference. First operand 141 states and 172 transitions. Second operand 15 states. [2020-10-27 01:09:35,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:35,734 INFO L93 Difference]: Finished difference Result 199 states and 241 transitions. [2020-10-27 01:09:35,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:09:35,735 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-10-27 01:09:35,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:35,737 INFO L225 Difference]: With dead ends: 199 [2020-10-27 01:09:35,737 INFO L226 Difference]: Without dead ends: 195 [2020-10-27 01:09:35,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:09:35,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-27 01:09:35,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 144. [2020-10-27 01:09:35,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-27 01:09:35,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 176 transitions. [2020-10-27 01:09:35,771 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 176 transitions. Word has length 37 [2020-10-27 01:09:35,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:35,771 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 176 transitions. [2020-10-27 01:09:35,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:09:35,772 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 176 transitions. [2020-10-27 01:09:35,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:09:35,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:35,773 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:35,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 01:09:35,773 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:35,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:35,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1370890866, now seen corresponding path program 8 times [2020-10-27 01:09:35,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:35,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649423791] [2020-10-27 01:09:35,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:35,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:35,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:36,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:36,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:09:36,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:36,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 447 [2020-10-27 01:09:36,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:36,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:09:36,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:36,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:09:36,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:36,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:36,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:36,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:36,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:36,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:36,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:36,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:09:36,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:36,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:36,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:36,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:36,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:36,777 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:36,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649423791] [2020-10-27 01:09:36,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:36,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:09:36,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046915501] [2020-10-27 01:09:36,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:09:36,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:36,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:09:36,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:09:36,779 INFO L87 Difference]: Start difference. First operand 144 states and 176 transitions. Second operand 14 states. [2020-10-27 01:09:37,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:37,768 INFO L93 Difference]: Finished difference Result 160 states and 193 transitions. [2020-10-27 01:09:37,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:09:37,769 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-27 01:09:37,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:37,771 INFO L225 Difference]: With dead ends: 160 [2020-10-27 01:09:37,771 INFO L226 Difference]: Without dead ends: 142 [2020-10-27 01:09:37,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:09:37,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-27 01:09:37,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 138. [2020-10-27 01:09:37,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-27 01:09:37,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 168 transitions. [2020-10-27 01:09:37,802 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 168 transitions. Word has length 38 [2020-10-27 01:09:37,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:37,802 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 168 transitions. [2020-10-27 01:09:37,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:09:37,802 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 168 transitions. [2020-10-27 01:09:37,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:09:37,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:37,803 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:37,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 01:09:37,803 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:37,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:37,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1398249767, now seen corresponding path program 8 times [2020-10-27 01:09:37,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:37,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379239113] [2020-10-27 01:09:37,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:37,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:37,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:37,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:38,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:38,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:09:38,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:09:38,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1089 [2020-10-27 01:09:38,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:38,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:09:38,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:38,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:09:38,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:39,219 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2020-10-27 01:09:39,416 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2020-10-27 01:09:39,581 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2020-10-27 01:09:40,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:40,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:40,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:40,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:40,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:40,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:40,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:09:40,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:40,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:40,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:40,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:40,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:40,230 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:40,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379239113] [2020-10-27 01:09:40,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:40,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:09:40,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882930120] [2020-10-27 01:09:40,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:09:40,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:40,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:09:40,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:09:40,232 INFO L87 Difference]: Start difference. First operand 138 states and 168 transitions. Second operand 15 states. [2020-10-27 01:09:40,592 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-27 01:09:40,855 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-27 01:09:43,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:43,279 INFO L93 Difference]: Finished difference Result 197 states and 234 transitions. [2020-10-27 01:09:43,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 01:09:43,280 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-27 01:09:43,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:43,281 INFO L225 Difference]: With dead ends: 197 [2020-10-27 01:09:43,281 INFO L226 Difference]: Without dead ends: 175 [2020-10-27 01:09:43,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:09:43,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-27 01:09:43,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 147. [2020-10-27 01:09:43,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-27 01:09:43,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 175 transitions. [2020-10-27 01:09:43,326 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 175 transitions. Word has length 38 [2020-10-27 01:09:43,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:43,326 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 175 transitions. [2020-10-27 01:09:43,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:09:43,326 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 175 transitions. [2020-10-27 01:09:43,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:09:43,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:43,327 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:43,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 01:09:43,327 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:43,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:43,328 INFO L82 PathProgramCache]: Analyzing trace with hash -961854706, now seen corresponding path program 9 times [2020-10-27 01:09:43,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:43,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840834711] [2020-10-27 01:09:43,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:43,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:43,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:43,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:44,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:44,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:09:44,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:09:44,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1046 [2020-10-27 01:09:44,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:44,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:09:44,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:44,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:09:44,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:45,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:45,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:45,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:45,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:45,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:45,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:45,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:09:45,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:45,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:45,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:45,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:45,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:45,113 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:45,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840834711] [2020-10-27 01:09:45,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:45,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:09:45,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250771567] [2020-10-27 01:09:45,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:09:45,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:45,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:09:45,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:09:45,115 INFO L87 Difference]: Start difference. First operand 147 states and 175 transitions. Second operand 16 states. [2020-10-27 01:09:46,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:46,598 INFO L93 Difference]: Finished difference Result 186 states and 220 transitions. [2020-10-27 01:09:46,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:09:46,599 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-27 01:09:46,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:46,601 INFO L225 Difference]: With dead ends: 186 [2020-10-27 01:09:46,601 INFO L226 Difference]: Without dead ends: 173 [2020-10-27 01:09:46,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:09:46,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-27 01:09:46,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 147. [2020-10-27 01:09:46,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-27 01:09:46,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 174 transitions. [2020-10-27 01:09:46,645 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 174 transitions. Word has length 38 [2020-10-27 01:09:46,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:46,645 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 174 transitions. [2020-10-27 01:09:46,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:09:46,646 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 174 transitions. [2020-10-27 01:09:46,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:09:46,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:46,646 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:46,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 01:09:46,647 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:46,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:46,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1223183068, now seen corresponding path program 12 times [2020-10-27 01:09:46,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:46,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758608056] [2020-10-27 01:09:46,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:46,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:46,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:47,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:47,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:09:47,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:47,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 524 [2020-10-27 01:09:47,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:47,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:09:47,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:47,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:09:47,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:47,572 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-10-27 01:09:48,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:48,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:48,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:48,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:48,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:48,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:48,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:09:48,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:48,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:48,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:48,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:48,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:48,061 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:48,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758608056] [2020-10-27 01:09:48,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:48,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:09:48,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145006949] [2020-10-27 01:09:48,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:09:48,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:48,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:09:48,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:09:48,062 INFO L87 Difference]: Start difference. First operand 147 states and 174 transitions. Second operand 16 states. [2020-10-27 01:09:49,330 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2020-10-27 01:09:51,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:51,571 INFO L93 Difference]: Finished difference Result 194 states and 228 transitions. [2020-10-27 01:09:51,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 01:09:51,572 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-27 01:09:51,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:51,574 INFO L225 Difference]: With dead ends: 194 [2020-10-27 01:09:51,574 INFO L226 Difference]: Without dead ends: 190 [2020-10-27 01:09:51,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=159, Invalid=1173, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:09:51,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-27 01:09:51,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 147. [2020-10-27 01:09:51,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-27 01:09:51,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 174 transitions. [2020-10-27 01:09:51,602 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 174 transitions. Word has length 38 [2020-10-27 01:09:51,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:51,602 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 174 transitions. [2020-10-27 01:09:51,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:09:51,602 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 174 transitions. [2020-10-27 01:09:51,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:09:51,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:51,603 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:51,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 01:09:51,603 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:51,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:51,603 INFO L82 PathProgramCache]: Analyzing trace with hash 355714925, now seen corresponding path program 10 times [2020-10-27 01:09:51,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:51,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943625335] [2020-10-27 01:09:51,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:51,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:51,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:51,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:51,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:53,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:53,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:09:53,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:09:53,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1466 [2020-10-27 01:09:53,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:53,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:09:53,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:53,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:09:53,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:53,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:53,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:53,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:53,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:53,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:53,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:53,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:09:53,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:53,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:53,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:53,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:53,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:53,359 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 01:09:53,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943625335] [2020-10-27 01:09:53,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:53,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:09:53,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246272398] [2020-10-27 01:09:53,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:09:53,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:53,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:09:53,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:09:53,360 INFO L87 Difference]: Start difference. First operand 147 states and 174 transitions. Second operand 10 states. [2020-10-27 01:09:54,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:54,024 INFO L93 Difference]: Finished difference Result 166 states and 195 transitions. [2020-10-27 01:09:54,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:09:54,025 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-27 01:09:54,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:54,026 INFO L225 Difference]: With dead ends: 166 [2020-10-27 01:09:54,026 INFO L226 Difference]: Without dead ends: 126 [2020-10-27 01:09:54,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:09:54,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-27 01:09:54,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2020-10-27 01:09:54,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-27 01:09:54,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 148 transitions. [2020-10-27 01:09:54,058 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 148 transitions. Word has length 39 [2020-10-27 01:09:54,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:54,058 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 148 transitions. [2020-10-27 01:09:54,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:09:54,059 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 148 transitions. [2020-10-27 01:09:54,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:09:54,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:54,059 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:54,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-27 01:09:54,060 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:54,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:54,060 INFO L82 PathProgramCache]: Analyzing trace with hash -572837181, now seen corresponding path program 11 times [2020-10-27 01:09:54,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:54,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175871100] [2020-10-27 01:09:54,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:54,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:54,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:54,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:55,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:55,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:09:55,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:09:55,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1361 [2020-10-27 01:09:55,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:55,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:09:55,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:55,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:09:55,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:56,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:56,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:56,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:56,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:56,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:56,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:56,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:09:56,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:56,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:56,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:56,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:56,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:56,332 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:56,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175871100] [2020-10-27 01:09:56,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:56,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:09:56,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639729714] [2020-10-27 01:09:56,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:09:56,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:56,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:09:56,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:09:56,333 INFO L87 Difference]: Start difference. First operand 126 states and 148 transitions. Second operand 16 states. [2020-10-27 01:09:57,068 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-27 01:09:58,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:58,310 INFO L93 Difference]: Finished difference Result 162 states and 191 transitions. [2020-10-27 01:09:58,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:09:58,311 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-27 01:09:58,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:58,311 INFO L225 Difference]: With dead ends: 162 [2020-10-27 01:09:58,312 INFO L226 Difference]: Without dead ends: 158 [2020-10-27 01:09:58,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:09:58,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-27 01:09:58,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2020-10-27 01:09:58,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-27 01:09:58,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 158 transitions. [2020-10-27 01:09:58,344 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 158 transitions. Word has length 39 [2020-10-27 01:09:58,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:58,345 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 158 transitions. [2020-10-27 01:09:58,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:09:58,345 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 158 transitions. [2020-10-27 01:09:58,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:09:58,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:58,345 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:58,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-27 01:09:58,345 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:58,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:58,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1803691233, now seen corresponding path program 13 times [2020-10-27 01:09:58,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:58,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176793795] [2020-10-27 01:09:58,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:58,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:58,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:58,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:58,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:09:58,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:58,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 492 [2020-10-27 01:09:58,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:58,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:09:58,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:09:58,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:09:58,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:59,163 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2020-10-27 01:09:59,334 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-10-27 01:09:59,484 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-10-27 01:09:59,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:59,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:59,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:59,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:59,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:59,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:59,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:09:59,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:59,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:59,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:59,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:59,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:59,992 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:59,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176793795] [2020-10-27 01:09:59,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:59,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:09:59,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004880653] [2020-10-27 01:09:59,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:09:59,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:59,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:09:59,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:09:59,994 INFO L87 Difference]: Start difference. First operand 133 states and 158 transitions. Second operand 16 states. [2020-10-27 01:10:01,287 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2020-10-27 01:10:03,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:03,298 INFO L93 Difference]: Finished difference Result 180 states and 215 transitions. [2020-10-27 01:10:03,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:10:03,299 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-27 01:10:03,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:03,301 INFO L225 Difference]: With dead ends: 180 [2020-10-27 01:10:03,301 INFO L226 Difference]: Without dead ends: 176 [2020-10-27 01:10:03,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:10:03,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-27 01:10:03,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 140. [2020-10-27 01:10:03,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-27 01:10:03,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 165 transitions. [2020-10-27 01:10:03,333 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 165 transitions. Word has length 39 [2020-10-27 01:10:03,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:03,334 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 165 transitions. [2020-10-27 01:10:03,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:10:03,334 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 165 transitions. [2020-10-27 01:10:03,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:10:03,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:03,335 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:03,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-27 01:10:03,335 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:03,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:03,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1071775785, now seen corresponding path program 3 times [2020-10-27 01:10:03,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:03,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066514286] [2020-10-27 01:10:03,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:03,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:03,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:03,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:03,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:10:03,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:03,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 601 [2020-10-27 01:10:03,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:03,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:10:03,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:03,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:10:03,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:04,344 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-10-27 01:10:04,603 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-27 01:10:04,903 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2020-10-27 01:10:05,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:05,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:05,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:05,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:05,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:05,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:05,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:10:05,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:05,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:05,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:05,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:05,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:05,361 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:05,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066514286] [2020-10-27 01:10:05,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:05,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:10:05,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751244985] [2020-10-27 01:10:05,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:10:05,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:05,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:10:05,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:10:05,363 INFO L87 Difference]: Start difference. First operand 140 states and 165 transitions. Second operand 16 states. [2020-10-27 01:10:05,838 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-10-27 01:10:07,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:07,192 INFO L93 Difference]: Finished difference Result 188 states and 222 transitions. [2020-10-27 01:10:07,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:10:07,193 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-27 01:10:07,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:07,195 INFO L225 Difference]: With dead ends: 188 [2020-10-27 01:10:07,195 INFO L226 Difference]: Without dead ends: 184 [2020-10-27 01:10:07,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:10:07,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-27 01:10:07,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 147. [2020-10-27 01:10:07,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-27 01:10:07,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 174 transitions. [2020-10-27 01:10:07,224 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 174 transitions. Word has length 39 [2020-10-27 01:10:07,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:07,224 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 174 transitions. [2020-10-27 01:10:07,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:10:07,224 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 174 transitions. [2020-10-27 01:10:07,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:10:07,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:07,225 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:07,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-27 01:10:07,225 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:07,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:07,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1316555703, now seen corresponding path program 1 times [2020-10-27 01:10:07,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:07,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263864931] [2020-10-27 01:10:07,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:07,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:07,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:07,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:07,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:11,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:11,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:10:11,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:10:11,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3804 [2020-10-27 01:10:11,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:11,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:10:11,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:11,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:10:11,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:11,582 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-10-27 01:10:11,745 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-10-27 01:10:12,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:12,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:12,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:12,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:12,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:12,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:12,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:10:12,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:12,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:12,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:12,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:12,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:12,413 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 01:10:12,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263864931] [2020-10-27 01:10:12,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:12,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:10:12,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536697257] [2020-10-27 01:10:12,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:10:12,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:12,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:10:12,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:10:12,415 INFO L87 Difference]: Start difference. First operand 147 states and 174 transitions. Second operand 15 states. [2020-10-27 01:10:13,020 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-10-27 01:10:14,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:14,105 INFO L93 Difference]: Finished difference Result 183 states and 212 transitions. [2020-10-27 01:10:14,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:10:14,106 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-10-27 01:10:14,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:14,107 INFO L225 Difference]: With dead ends: 183 [2020-10-27 01:10:14,107 INFO L226 Difference]: Without dead ends: 179 [2020-10-27 01:10:14,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:10:14,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-27 01:10:14,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 149. [2020-10-27 01:10:14,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-27 01:10:14,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 177 transitions. [2020-10-27 01:10:14,151 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 177 transitions. Word has length 39 [2020-10-27 01:10:14,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:14,151 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 177 transitions. [2020-10-27 01:10:14,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:10:14,151 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 177 transitions. [2020-10-27 01:10:14,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:10:14,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:14,152 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:14,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-27 01:10:14,152 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:14,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:14,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1093546801, now seen corresponding path program 9 times [2020-10-27 01:10:14,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:14,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693511757] [2020-10-27 01:10:14,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:14,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:14,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:14,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:15,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:15,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:10:15,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:10:15,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1570 [2020-10-27 01:10:15,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:15,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:10:15,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:15,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:10:15,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:16,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:16,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:16,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:16,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:16,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:16,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:16,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:10:16,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:16,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:16,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:16,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:16,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:16,604 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:16,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693511757] [2020-10-27 01:10:16,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:16,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:10:16,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87805208] [2020-10-27 01:10:16,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:10:16,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:16,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:10:16,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:10:16,606 INFO L87 Difference]: Start difference. First operand 149 states and 177 transitions. Second operand 16 states. [2020-10-27 01:10:18,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:18,591 INFO L93 Difference]: Finished difference Result 182 states and 213 transitions. [2020-10-27 01:10:18,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:10:18,592 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-27 01:10:18,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:18,594 INFO L225 Difference]: With dead ends: 182 [2020-10-27 01:10:18,594 INFO L226 Difference]: Without dead ends: 178 [2020-10-27 01:10:18,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:10:18,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-27 01:10:18,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 147. [2020-10-27 01:10:18,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-27 01:10:18,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 175 transitions. [2020-10-27 01:10:18,630 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 175 transitions. Word has length 39 [2020-10-27 01:10:18,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:18,630 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 175 transitions. [2020-10-27 01:10:18,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:10:18,631 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 175 transitions. [2020-10-27 01:10:18,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:10:18,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:18,631 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:18,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-27 01:10:18,632 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:18,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:18,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1046719708, now seen corresponding path program 4 times [2020-10-27 01:10:18,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:18,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508143373] [2020-10-27 01:10:18,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:18,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:18,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:19,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:19,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:10:19,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:19,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 427 [2020-10-27 01:10:19,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:19,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:10:19,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:19,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:10:19,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:19,453 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-10-27 01:10:19,742 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 35 [2020-10-27 01:10:20,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:20,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:20,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:20,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:20,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:20,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:20,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:10:20,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:20,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:20,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:20,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:20,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:20,171 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:20,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508143373] [2020-10-27 01:10:20,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:20,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:10:20,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743198092] [2020-10-27 01:10:20,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:10:20,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:20,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:10:20,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:10:20,173 INFO L87 Difference]: Start difference. First operand 147 states and 175 transitions. Second operand 15 states. [2020-10-27 01:10:21,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:21,807 INFO L93 Difference]: Finished difference Result 169 states and 199 transitions. [2020-10-27 01:10:21,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:10:21,808 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-10-27 01:10:21,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:21,809 INFO L225 Difference]: With dead ends: 169 [2020-10-27 01:10:21,810 INFO L226 Difference]: Without dead ends: 148 [2020-10-27 01:10:21,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:10:21,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-27 01:10:21,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 143. [2020-10-27 01:10:21,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-27 01:10:21,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 170 transitions. [2020-10-27 01:10:21,849 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 170 transitions. Word has length 40 [2020-10-27 01:10:21,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:21,849 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 170 transitions. [2020-10-27 01:10:21,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:10:21,850 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 170 transitions. [2020-10-27 01:10:21,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:10:21,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:21,851 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:21,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-27 01:10:21,851 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:21,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:21,851 INFO L82 PathProgramCache]: Analyzing trace with hash 438830995, now seen corresponding path program 12 times [2020-10-27 01:10:21,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:21,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464817066] [2020-10-27 01:10:21,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:21,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:21,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:21,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:22,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:22,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:26,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:26,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:10:26,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:10:26,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 01:10:26,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:26,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:10:26,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:26,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:10:26,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:27,172 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 29 [2020-10-27 01:10:27,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:27,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:27,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:27,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:27,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:27,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:27,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:10:27,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:27,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:27,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:27,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:27,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:27,607 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:27,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464817066] [2020-10-27 01:10:27,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:27,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:10:27,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799812674] [2020-10-27 01:10:27,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:10:27,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:27,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:10:27,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:10:27,609 INFO L87 Difference]: Start difference. First operand 143 states and 170 transitions. Second operand 15 states. [2020-10-27 01:10:29,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:29,106 INFO L93 Difference]: Finished difference Result 172 states and 203 transitions. [2020-10-27 01:10:29,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:10:29,107 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-10-27 01:10:29,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:29,109 INFO L225 Difference]: With dead ends: 172 [2020-10-27 01:10:29,109 INFO L226 Difference]: Without dead ends: 162 [2020-10-27 01:10:29,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:10:29,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-27 01:10:29,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 145. [2020-10-27 01:10:29,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-27 01:10:29,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 172 transitions. [2020-10-27 01:10:29,140 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 172 transitions. Word has length 40 [2020-10-27 01:10:29,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:29,140 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 172 transitions. [2020-10-27 01:10:29,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:10:29,140 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 172 transitions. [2020-10-27 01:10:29,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:10:29,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:29,141 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:29,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-27 01:10:29,141 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:29,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:29,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1086995668, now seen corresponding path program 10 times [2020-10-27 01:10:29,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:29,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629692974] [2020-10-27 01:10:29,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:29,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:29,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:29,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:30,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:30,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:10:30,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:10:30,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1194 [2020-10-27 01:10:30,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:30,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:10:30,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:30,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:10:30,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:30,692 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-10-27 01:10:30,896 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-27 01:10:31,127 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 45 [2020-10-27 01:10:31,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:31,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:31,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:31,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:31,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:31,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:31,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:10:31,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:31,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:31,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:31,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:31,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:31,591 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:31,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629692974] [2020-10-27 01:10:31,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:31,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:10:31,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288899089] [2020-10-27 01:10:31,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:10:31,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:31,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:10:31,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:10:31,593 INFO L87 Difference]: Start difference. First operand 145 states and 172 transitions. Second operand 16 states. [2020-10-27 01:10:32,177 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-27 01:10:33,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:33,987 INFO L93 Difference]: Finished difference Result 186 states and 222 transitions. [2020-10-27 01:10:33,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:10:33,988 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-27 01:10:33,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:33,990 INFO L225 Difference]: With dead ends: 186 [2020-10-27 01:10:33,990 INFO L226 Difference]: Without dead ends: 182 [2020-10-27 01:10:33,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:10:33,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-27 01:10:34,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 146. [2020-10-27 01:10:34,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-27 01:10:34,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 173 transitions. [2020-10-27 01:10:34,020 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 173 transitions. Word has length 40 [2020-10-27 01:10:34,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:34,020 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 173 transitions. [2020-10-27 01:10:34,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:10:34,021 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 173 transitions. [2020-10-27 01:10:34,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:10:34,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:34,021 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:34,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-27 01:10:34,022 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:34,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:34,022 INFO L82 PathProgramCache]: Analyzing trace with hash 847867155, now seen corresponding path program 13 times [2020-10-27 01:10:34,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:34,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461936207] [2020-10-27 01:10:34,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:34,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:34,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:34,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:35,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:35,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:10:35,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:10:35,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1446 [2020-10-27 01:10:35,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:35,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:10:35,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:35,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:10:35,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:36,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:36,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:36,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:36,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:36,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:36,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:36,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:10:36,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:36,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:36,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:36,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:36,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:36,022 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 01:10:36,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461936207] [2020-10-27 01:10:36,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:36,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:10:36,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919320041] [2020-10-27 01:10:36,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:10:36,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:36,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:10:36,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:10:36,024 INFO L87 Difference]: Start difference. First operand 146 states and 173 transitions. Second operand 12 states. [2020-10-27 01:10:36,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:36,863 INFO L93 Difference]: Finished difference Result 181 states and 209 transitions. [2020-10-27 01:10:36,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:10:36,864 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-10-27 01:10:36,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:36,865 INFO L225 Difference]: With dead ends: 181 [2020-10-27 01:10:36,865 INFO L226 Difference]: Without dead ends: 150 [2020-10-27 01:10:36,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:10:36,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-27 01:10:36,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 146. [2020-10-27 01:10:36,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-27 01:10:36,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 171 transitions. [2020-10-27 01:10:36,900 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 171 transitions. Word has length 40 [2020-10-27 01:10:36,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:36,900 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 171 transitions. [2020-10-27 01:10:36,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:10:36,900 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 171 transitions. [2020-10-27 01:10:36,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:10:36,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:36,901 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:36,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-27 01:10:36,901 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:36,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:36,902 INFO L82 PathProgramCache]: Analyzing trace with hash 622517768, now seen corresponding path program 14 times [2020-10-27 01:10:36,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:36,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [70325590] [2020-10-27 01:10:36,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:36,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:36,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:37,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:37,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:10:37,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:37,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 579 [2020-10-27 01:10:37,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:37,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:10:37,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:37,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:10:37,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:38,015 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 51 [2020-10-27 01:10:38,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:38,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:38,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:38,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:38,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:38,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:38,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:10:38,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:38,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:38,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:38,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:38,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:38,513 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:38,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [70325590] [2020-10-27 01:10:38,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:38,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:10:38,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018593808] [2020-10-27 01:10:38,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:10:38,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:38,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:10:38,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:10:38,515 INFO L87 Difference]: Start difference. First operand 146 states and 171 transitions. Second operand 16 states. [2020-10-27 01:10:38,928 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-10-27 01:10:39,289 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-10-27 01:10:39,514 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-10-27 01:10:40,237 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-10-27 01:10:40,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:40,529 INFO L93 Difference]: Finished difference Result 187 states and 217 transitions. [2020-10-27 01:10:40,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:10:40,530 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2020-10-27 01:10:40,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:40,531 INFO L225 Difference]: With dead ends: 187 [2020-10-27 01:10:40,531 INFO L226 Difference]: Without dead ends: 179 [2020-10-27 01:10:40,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:10:40,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-27 01:10:40,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 148. [2020-10-27 01:10:40,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-27 01:10:40,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 173 transitions. [2020-10-27 01:10:40,568 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 173 transitions. Word has length 41 [2020-10-27 01:10:40,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:40,568 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 173 transitions. [2020-10-27 01:10:40,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:10:40,569 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 173 transitions. [2020-10-27 01:10:40,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:10:40,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:40,570 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:40,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-27 01:10:40,570 INFO L429 AbstractCegarLoop]: === Iteration 64 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:40,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:40,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1214361282, now seen corresponding path program 5 times [2020-10-27 01:10:40,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:40,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88582758] [2020-10-27 01:10:40,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:40,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:40,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:41,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:41,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:10:41,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:41,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 746 [2020-10-27 01:10:41,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:41,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:10:41,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:41,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 01:10:41,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:41,733 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2020-10-27 01:10:41,981 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 56 [2020-10-27 01:10:42,122 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-27 01:10:42,583 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 49 [2020-10-27 01:10:42,932 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 44 [2020-10-27 01:10:43,148 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 39 [2020-10-27 01:10:43,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:43,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:43,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:43,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:43,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:43,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:43,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:10:43,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:43,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:43,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:43,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:43,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:43,529 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:43,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88582758] [2020-10-27 01:10:43,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:43,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:10:43,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813439557] [2020-10-27 01:10:43,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:10:43,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:43,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:10:43,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:10:43,531 INFO L87 Difference]: Start difference. First operand 148 states and 173 transitions. Second operand 17 states. [2020-10-27 01:10:44,515 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-10-27 01:10:45,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:45,310 INFO L93 Difference]: Finished difference Result 195 states and 227 transitions. [2020-10-27 01:10:45,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:10:45,312 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-10-27 01:10:45,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:45,314 INFO L225 Difference]: With dead ends: 195 [2020-10-27 01:10:45,314 INFO L226 Difference]: Without dead ends: 191 [2020-10-27 01:10:45,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:10:45,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-27 01:10:45,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 155. [2020-10-27 01:10:45,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-27 01:10:45,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 182 transitions. [2020-10-27 01:10:45,358 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 182 transitions. Word has length 41 [2020-10-27 01:10:45,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:45,358 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 182 transitions. [2020-10-27 01:10:45,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:10:45,358 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 182 transitions. [2020-10-27 01:10:45,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:10:45,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:45,359 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:45,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-27 01:10:45,359 INFO L429 AbstractCegarLoop]: === Iteration 65 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:45,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:45,360 INFO L82 PathProgramCache]: Analyzing trace with hash -306034338, now seen corresponding path program 15 times [2020-10-27 01:10:45,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:45,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613558000] [2020-10-27 01:10:45,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:45,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:45,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:45,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:45,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:48,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:48,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:10:48,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:10:48,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3205 [2020-10-27 01:10:48,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:48,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:10:48,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:48,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 01:10:48,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:49,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:49,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:49,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:49,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:49,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:49,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:49,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:10:49,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:49,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:49,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:49,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:49,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:49,510 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:49,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613558000] [2020-10-27 01:10:49,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:49,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:10:49,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289988382] [2020-10-27 01:10:49,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:10:49,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:49,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:10:49,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:10:49,511 INFO L87 Difference]: Start difference. First operand 155 states and 182 transitions. Second operand 17 states. [2020-10-27 01:10:50,236 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-10-27 01:10:51,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:51,533 INFO L93 Difference]: Finished difference Result 209 states and 245 transitions. [2020-10-27 01:10:51,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:10:51,534 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-10-27 01:10:51,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:51,536 INFO L225 Difference]: With dead ends: 209 [2020-10-27 01:10:51,536 INFO L226 Difference]: Without dead ends: 205 [2020-10-27 01:10:51,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:10:51,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-27 01:10:51,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 164. [2020-10-27 01:10:51,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-27 01:10:51,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 195 transitions. [2020-10-27 01:10:51,590 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 195 transitions. Word has length 41 [2020-10-27 01:10:51,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:51,590 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 195 transitions. [2020-10-27 01:10:51,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:10:51,590 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 195 transitions. [2020-10-27 01:10:51,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:10:51,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:51,591 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:10:51,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-27 01:10:51,592 INFO L429 AbstractCegarLoop]: === Iteration 66 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:51,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:51,592 INFO L82 PathProgramCache]: Analyzing trace with hash 2070494076, now seen corresponding path program 14 times [2020-10-27 01:10:51,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:51,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713880327] [2020-10-27 01:10:51,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:51,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:51,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:52,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:52,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:10:52,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:52,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 763 [2020-10-27 01:10:52,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:52,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:10:52,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:52,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 01:10:52,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:52,877 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 01:10:53,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:10:53,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:53,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:53,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:53,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:10:53,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:53,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:10:53,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:53,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:10:53,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:10:53,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:10:53,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:10:53,551 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:10:53,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713880327] [2020-10-27 01:10:53,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:10:53,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:10:53,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054605572] [2020-10-27 01:10:53,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:10:53,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:10:53,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:10:53,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:10:53,553 INFO L87 Difference]: Start difference. First operand 164 states and 195 transitions. Second operand 17 states. [2020-10-27 01:10:54,055 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-10-27 01:10:54,347 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-10-27 01:10:55,522 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 01:10:56,142 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-10-27 01:10:56,853 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-10-27 01:10:57,586 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-27 01:10:58,314 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-10-27 01:10:58,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:10:58,962 INFO L93 Difference]: Finished difference Result 250 states and 301 transitions. [2020-10-27 01:10:58,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 01:10:58,963 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-10-27 01:10:58,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:10:58,965 INFO L225 Difference]: With dead ends: 250 [2020-10-27 01:10:58,965 INFO L226 Difference]: Without dead ends: 246 [2020-10-27 01:10:58,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=167, Invalid=1393, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 01:10:58,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-27 01:10:59,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 168. [2020-10-27 01:10:59,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-27 01:10:59,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 201 transitions. [2020-10-27 01:10:59,010 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 201 transitions. Word has length 41 [2020-10-27 01:10:59,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:10:59,011 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 201 transitions. [2020-10-27 01:10:59,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:10:59,011 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 201 transitions. [2020-10-27 01:10:59,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:10:59,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:10:59,012 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 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 01:10:59,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-27 01:10:59,012 INFO L429 AbstractCegarLoop]: === Iteration 67 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:10:59,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:10:59,012 INFO L82 PathProgramCache]: Analyzing trace with hash -804972942, now seen corresponding path program 5 times [2020-10-27 01:10:59,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:10:59,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412372690] [2020-10-27 01:10:59,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:10:59,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:10:59,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:10:59,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:10:59,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:10:59,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:10:59,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 700 [2020-10-27 01:10:59,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:10:59,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:10:59,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:10:59,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 01:10:59,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:00,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:11:00,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:00,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:00,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:00,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:11:00,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:11:00,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:11:00,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:00,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:11:00,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:11:00,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:11:00,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:00,598 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:11:00,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412372690] [2020-10-27 01:11:00,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:11:00,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:11:00,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748059437] [2020-10-27 01:11:00,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:11:00,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:11:00,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:11:00,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:11:00,600 INFO L87 Difference]: Start difference. First operand 168 states and 201 transitions. Second operand 17 states. [2020-10-27 01:11:02,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:11:02,357 INFO L93 Difference]: Finished difference Result 203 states and 237 transitions. [2020-10-27 01:11:02,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:11:02,358 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-10-27 01:11:02,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:11:02,359 INFO L225 Difference]: With dead ends: 203 [2020-10-27 01:11:02,360 INFO L226 Difference]: Without dead ends: 199 [2020-10-27 01:11:02,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:11:02,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-27 01:11:02,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 164. [2020-10-27 01:11:02,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-27 01:11:02,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 196 transitions. [2020-10-27 01:11:02,402 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 196 transitions. Word has length 41 [2020-10-27 01:11:02,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:11:02,402 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 196 transitions. [2020-10-27 01:11:02,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:11:02,402 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 196 transitions. [2020-10-27 01:11:02,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:11:02,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:11:02,403 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:11:02,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-27 01:11:02,403 INFO L429 AbstractCegarLoop]: === Iteration 68 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:11:02,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:11:02,404 INFO L82 PathProgramCache]: Analyzing trace with hash 253317533, now seen corresponding path program 6 times [2020-10-27 01:11:02,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:11:02,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682465728] [2020-10-27 01:11:02,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:11:02,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:02,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:03,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:03,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:11:03,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:11:03,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 612 [2020-10-27 01:11:03,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:03,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:11:03,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:11:03,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 01:11:03,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:03,281 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-10-27 01:11:03,571 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 40 [2020-10-27 01:11:03,721 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2020-10-27 01:11:03,861 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2020-10-27 01:11:04,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:11:04,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:04,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:04,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:04,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:11:04,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:11:04,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:11:04,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:04,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:11:04,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:11:04,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:11:04,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:04,185 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:11:04,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682465728] [2020-10-27 01:11:04,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:11:04,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:11:04,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905639936] [2020-10-27 01:11:04,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:11:04,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:11:04,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:11:04,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:11:04,187 INFO L87 Difference]: Start difference. First operand 164 states and 196 transitions. Second operand 16 states. [2020-10-27 01:11:05,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:11:05,658 INFO L93 Difference]: Finished difference Result 189 states and 223 transitions. [2020-10-27 01:11:05,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:11:05,659 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-10-27 01:11:05,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:11:05,660 INFO L225 Difference]: With dead ends: 189 [2020-10-27 01:11:05,660 INFO L226 Difference]: Without dead ends: 169 [2020-10-27 01:11:05,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:11:05,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-27 01:11:05,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 160. [2020-10-27 01:11:05,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-27 01:11:05,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 191 transitions. [2020-10-27 01:11:05,696 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 191 transitions. Word has length 42 [2020-10-27 01:11:05,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:11:05,697 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 191 transitions. [2020-10-27 01:11:05,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:11:05,697 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 191 transitions. [2020-10-27 01:11:05,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:11:05,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:11:05,697 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:11:05,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-27 01:11:05,698 INFO L429 AbstractCegarLoop]: === Iteration 69 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:11:05,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:11:05,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1927341437, now seen corresponding path program 1 times [2020-10-27 01:11:05,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:11:05,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1960827224] [2020-10-27 01:11:05,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:11:05,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:05,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:06,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:06,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:11:06,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:11:06,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 515 [2020-10-27 01:11:06,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:06,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:11:06,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:11:06,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:11:06,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:06,466 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2020-10-27 01:11:06,677 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-10-27 01:11:07,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:11:07,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:07,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:07,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:07,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:11:07,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:11:07,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:11:07,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:07,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:11:07,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:11:07,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:11:07,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:07,220 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:11:07,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1960827224] [2020-10-27 01:11:07,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:11:07,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:11:07,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529459938] [2020-10-27 01:11:07,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:11:07,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:11:07,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:11:07,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:11:07,222 INFO L87 Difference]: Start difference. First operand 160 states and 191 transitions. Second operand 15 states. [2020-10-27 01:11:08,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:11:08,698 INFO L93 Difference]: Finished difference Result 190 states and 223 transitions. [2020-10-27 01:11:08,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:11:08,699 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-10-27 01:11:08,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:11:08,700 INFO L225 Difference]: With dead ends: 190 [2020-10-27 01:11:08,700 INFO L226 Difference]: Without dead ends: 180 [2020-10-27 01:11:08,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:11:08,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-27 01:11:08,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 160. [2020-10-27 01:11:08,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-27 01:11:08,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 190 transitions. [2020-10-27 01:11:08,743 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 190 transitions. Word has length 42 [2020-10-27 01:11:08,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:11:08,743 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 190 transitions. [2020-10-27 01:11:08,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:11:08,743 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 190 transitions. [2020-10-27 01:11:08,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:11:08,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:11:08,744 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:11:08,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-27 01:11:08,744 INFO L429 AbstractCegarLoop]: === Iteration 70 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:11:08,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:11:08,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1298069257, now seen corresponding path program 16 times [2020-10-27 01:11:08,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:11:08,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138198652] [2020-10-27 01:11:08,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:11:08,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:08,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:08,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:09,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:11,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:11,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:11:11,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:11:11,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3023 [2020-10-27 01:11:11,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:11,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:11:11,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:11:11,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:11:11,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:12,158 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-10-27 01:11:13,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:11:13,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:13,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:13,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:13,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:11:13,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:11:13,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:11:13,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:13,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:11:13,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:11:13,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:11:13,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:13,110 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:11:13,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138198652] [2020-10-27 01:11:13,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:11:13,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:11:13,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307433457] [2020-10-27 01:11:13,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:11:13,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:11:13,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:11:13,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:11:13,111 INFO L87 Difference]: Start difference. First operand 160 states and 190 transitions. Second operand 16 states. [2020-10-27 01:11:13,388 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-10-27 01:11:13,627 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2020-10-27 01:11:15,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:11:15,125 INFO L93 Difference]: Finished difference Result 197 states and 233 transitions. [2020-10-27 01:11:15,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:11:15,126 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-10-27 01:11:15,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:11:15,128 INFO L225 Difference]: With dead ends: 197 [2020-10-27 01:11:15,128 INFO L226 Difference]: Without dead ends: 189 [2020-10-27 01:11:15,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:11:15,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-27 01:11:15,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 167. [2020-10-27 01:11:15,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-27 01:11:15,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 200 transitions. [2020-10-27 01:11:15,167 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 200 transitions. Word has length 42 [2020-10-27 01:11:15,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:11:15,168 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 200 transitions. [2020-10-27 01:11:15,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:11:15,168 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 200 transitions. [2020-10-27 01:11:15,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:11:15,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:11:15,169 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:11:15,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-27 01:11:15,170 INFO L429 AbstractCegarLoop]: === Iteration 71 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:11:15,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:11:15,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1450551649, now seen corresponding path program 15 times [2020-10-27 01:11:15,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:11:15,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708684053] [2020-10-27 01:11:15,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:11:15,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:15,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:15,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:15,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:11:15,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:11:15,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 466 [2020-10-27 01:11:15,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:15,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:11:15,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:11:15,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 01:11:15,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:16,100 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-10-27 01:11:16,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:11:16,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:16,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:16,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:16,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:11:16,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:11:16,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:11:16,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:16,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:11:16,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:11:16,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:11:16,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:16,856 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:11:16,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708684053] [2020-10-27 01:11:16,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:11:16,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:11:16,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929783755] [2020-10-27 01:11:16,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:11:16,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:11:16,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:11:16,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:11:16,858 INFO L87 Difference]: Start difference. First operand 167 states and 200 transitions. Second operand 16 states. [2020-10-27 01:11:18,297 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2020-10-27 01:11:18,695 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2020-10-27 01:11:20,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:11:20,665 INFO L93 Difference]: Finished difference Result 217 states and 259 transitions. [2020-10-27 01:11:20,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 01:11:20,666 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-10-27 01:11:20,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:11:20,668 INFO L225 Difference]: With dead ends: 217 [2020-10-27 01:11:20,668 INFO L226 Difference]: Without dead ends: 190 [2020-10-27 01:11:20,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:11:20,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-27 01:11:20,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 167. [2020-10-27 01:11:20,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-27 01:11:20,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 199 transitions. [2020-10-27 01:11:20,714 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 199 transitions. Word has length 42 [2020-10-27 01:11:20,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:11:20,715 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 199 transitions. [2020-10-27 01:11:20,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:11:20,715 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 199 transitions. [2020-10-27 01:11:20,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:11:20,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:11:20,715 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 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 01:11:20,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-27 01:11:20,715 INFO L429 AbstractCegarLoop]: === Iteration 72 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:11:20,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:11:20,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1365766167, now seen corresponding path program 7 times [2020-10-27 01:11:20,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:11:20,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191746438] [2020-10-27 01:11:20,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:11:20,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:20,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:21,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:21,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:11:21,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:11:21,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 645 [2020-10-27 01:11:21,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:21,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:11:21,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:11:21,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:11:21,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:21,730 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-27 01:11:21,959 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-10-27 01:11:22,354 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 45 [2020-10-27 01:11:22,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:11:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:22,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:22,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:22,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:11:22,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:11:22,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:11:22,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:22,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:11:22,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:11:22,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:11:22,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:22,748 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:11:22,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191746438] [2020-10-27 01:11:22,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:11:22,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:11:22,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166393759] [2020-10-27 01:11:22,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:11:22,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:11:22,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:11:22,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:11:22,750 INFO L87 Difference]: Start difference. First operand 167 states and 199 transitions. Second operand 17 states. [2020-10-27 01:11:24,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:11:24,959 INFO L93 Difference]: Finished difference Result 211 states and 251 transitions. [2020-10-27 01:11:24,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:11:24,961 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-10-27 01:11:24,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:11:24,963 INFO L225 Difference]: With dead ends: 211 [2020-10-27 01:11:24,963 INFO L226 Difference]: Without dead ends: 207 [2020-10-27 01:11:24,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:11:24,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-27 01:11:25,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 171. [2020-10-27 01:11:25,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-27 01:11:25,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 204 transitions. [2020-10-27 01:11:25,009 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 204 transitions. Word has length 42 [2020-10-27 01:11:25,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:11:25,009 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 204 transitions. [2020-10-27 01:11:25,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:11:25,009 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 204 transitions. [2020-10-27 01:11:25,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:11:25,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:11:25,010 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:11:25,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-27 01:11:25,010 INFO L429 AbstractCegarLoop]: === Iteration 73 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:11:25,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:11:25,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1406042127, now seen corresponding path program 11 times [2020-10-27 01:11:25,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:11:25,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392940386] [2020-10-27 01:11:25,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:11:25,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:25,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:25,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:26,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:26,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:11:26,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:11:26,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1632 [2020-10-27 01:11:26,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:26,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:11:26,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:11:26,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:11:26,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:27,197 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-10-27 01:11:27,520 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-10-27 01:11:27,797 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2020-10-27 01:11:28,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:11:28,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:11:28,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:11:28,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:11:28,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:11:28,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:11:28,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:11:28,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:11:28,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:11:28,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:11:28,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:11:28,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:11:28,760 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:11:28,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392940386] [2020-10-27 01:11:28,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:11:28,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:11:28,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68485236] [2020-10-27 01:11:28,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:11:28,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:11:28,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:11:28,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:11:28,762 INFO L87 Difference]: Start difference. First operand 171 states and 204 transitions. Second operand 18 states. [2020-10-27 01:11:29,755 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61