/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/forester-heap/sll-optional-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:46:56,744 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:46:56,747 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:46:56,801 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:46:56,802 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:46:56,809 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:46:56,811 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:46:56,815 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:46:56,819 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:46:56,825 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:46:56,826 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:46:56,828 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:46:56,828 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:46:56,832 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:46:56,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:46:56,838 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:46:56,839 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:46:56,842 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:46:56,849 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:46:56,857 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:46:56,859 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:46:56,861 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:46:56,865 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:46:56,867 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:46:56,876 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:46:56,876 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:46:56,876 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:46:56,878 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:46:56,880 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:46:56,881 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:46:56,881 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:46:56,882 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:46:56,884 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:46:56,885 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:46:56,886 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:46:56,886 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:46:56,900 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:46:56,901 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:46:56,901 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:46:56,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:46:56,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:46:56,910 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 19:46:56,963 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:46:56,964 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:46:56,968 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:46:56,968 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:46:56,969 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:46:56,969 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:46:56,969 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:46:56,969 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:46:56,970 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:46:56,971 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:46:56,972 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:46:56,972 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:46:56,972 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:46:56,972 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:46:56,973 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:46:56,973 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:46:56,973 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:46:56,973 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:46:56,973 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:46:56,974 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:46:56,974 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:46:56,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:46:56,974 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:46:56,975 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:46:56,975 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:46:56,975 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:46:56,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:46:56,975 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:46:56,976 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:46:56,976 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:46:57,435 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:46:57,466 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:46:57,470 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:46:57,471 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:46:57,472 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:46:57,473 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-optional-1.i [2020-10-27 19:46:57,554 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f0643d850/a8cde49b955949ac80a0ef0eb2dbf340/FLAG1c4c2c0ec [2020-10-27 19:46:58,355 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:46:58,355 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-optional-1.i [2020-10-27 19:46:58,379 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f0643d850/a8cde49b955949ac80a0ef0eb2dbf340/FLAG1c4c2c0ec [2020-10-27 19:46:58,566 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f0643d850/a8cde49b955949ac80a0ef0eb2dbf340 [2020-10-27 19:46:58,579 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:46:58,588 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:46:58,593 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:46:58,593 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:46:58,598 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:46:58,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:46:58" (1/1) ... [2020-10-27 19:46:58,605 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4854903f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:58, skipping insertion in model container [2020-10-27 19:46:58,606 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:46:58" (1/1) ... [2020-10-27 19:46:58,616 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:46:58,684 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:46:59,095 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:46:59,114 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:46:59,210 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:46:59,278 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:46:59,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:59 WrapperNode [2020-10-27 19:46:59,279 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:46:59,280 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:46:59,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:46:59,280 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:46:59,294 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:59" (1/1) ... [2020-10-27 19:46:59,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:59" (1/1) ... [2020-10-27 19:46:59,334 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:59" (1/1) ... [2020-10-27 19:46:59,335 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:59" (1/1) ... [2020-10-27 19:46:59,356 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:59" (1/1) ... [2020-10-27 19:46:59,363 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:59" (1/1) ... [2020-10-27 19:46:59,367 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:59" (1/1) ... [2020-10-27 19:46:59,392 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:46:59,394 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:46:59,394 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:46:59,394 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:46:59,395 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:59" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:46:59,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:46:59,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:46:59,477 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:46:59,477 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:46:59,478 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 19:46:59,478 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 19:46:59,478 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 19:46:59,478 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 19:46:59,478 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 19:46:59,478 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 19:46:59,479 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 19:46:59,479 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 19:46:59,479 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 19:46:59,479 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 19:46:59,479 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 19:46:59,479 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 19:46:59,480 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 19:46:59,480 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 19:46:59,480 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 19:46:59,480 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 19:46:59,480 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 19:46:59,480 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 19:46:59,480 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 19:46:59,481 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 19:46:59,481 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 19:46:59,481 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 19:46:59,481 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 19:46:59,481 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 19:46:59,481 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 19:46:59,481 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 19:46:59,482 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 19:46:59,482 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 19:46:59,482 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 19:46:59,482 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 19:46:59,482 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 19:46:59,482 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 19:46:59,482 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 19:46:59,483 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 19:46:59,483 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 19:46:59,483 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 19:46:59,483 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 19:46:59,483 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 19:46:59,483 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 19:46:59,483 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 19:46:59,484 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 19:46:59,484 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 19:46:59,484 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 19:46:59,484 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 19:46:59,484 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 19:46:59,484 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 19:46:59,484 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 19:46:59,485 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 19:46:59,485 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 19:46:59,485 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 19:46:59,485 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 19:46:59,485 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 19:46:59,485 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 19:46:59,486 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 19:46:59,486 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 19:46:59,486 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 19:46:59,486 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 19:46:59,486 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 19:46:59,486 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 19:46:59,486 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:46:59,487 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 19:46:59,487 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 19:46:59,487 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 19:46:59,487 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 19:46:59,487 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 19:46:59,487 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 19:46:59,488 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 19:46:59,488 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 19:46:59,488 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 19:46:59,488 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 19:46:59,488 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 19:46:59,488 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 19:46:59,488 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 19:46:59,489 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 19:46:59,489 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 19:46:59,489 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 19:46:59,489 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 19:46:59,489 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 19:46:59,489 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 19:46:59,489 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 19:46:59,490 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 19:46:59,490 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 19:46:59,490 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 19:46:59,490 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 19:46:59,490 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 19:46:59,490 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 19:46:59,490 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 19:46:59,491 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 19:46:59,491 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 19:46:59,491 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 19:46:59,491 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 19:46:59,491 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 19:46:59,491 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 19:46:59,491 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 19:46:59,492 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 19:46:59,492 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 19:46:59,492 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 19:46:59,492 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 19:46:59,492 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 19:46:59,492 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 19:46:59,492 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 19:46:59,493 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 19:46:59,493 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 19:46:59,493 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 19:46:59,493 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:46:59,493 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 19:46:59,493 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 19:46:59,493 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:46:59,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:46:59,494 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:46:59,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 19:46:59,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 19:46:59,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:46:59,494 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 19:46:59,494 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:46:59,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:46:59,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:46:59,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:46:59,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:47:00,168 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:47:00,170 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-27 19:47:00,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:47:00 BoogieIcfgContainer [2020-10-27 19:47:00,173 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:47:00,175 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:47:00,176 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:47:00,180 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:47:00,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:46:58" (1/3) ... [2020-10-27 19:47:00,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fd99954 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:47:00, skipping insertion in model container [2020-10-27 19:47:00,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:59" (2/3) ... [2020-10-27 19:47:00,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fd99954 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:47:00, skipping insertion in model container [2020-10-27 19:47:00,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:47:00" (3/3) ... [2020-10-27 19:47:00,189 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-optional-1.i [2020-10-27 19:47:00,233 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:47:00,240 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:47:00,259 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:47:00,312 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:47:00,312 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:47:00,312 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:47:00,314 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:47:00,320 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:47:00,320 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:47:00,321 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:47:00,321 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:47:00,348 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-27 19:47:00,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 19:47:00,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:00,358 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] [2020-10-27 19:47:00,358 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:00,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:00,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1827068410, now seen corresponding path program 1 times [2020-10-27 19:47:00,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:00,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283152931] [2020-10-27 19:47:00,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:00,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:00,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:00,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:01,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:01,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 19:47:01,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:47:01,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 784 [2020-10-27 19:47:01,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:01,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:01,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 19:47:01,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:01,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 19:47:01,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:01,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:01,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:01,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:01,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:01,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:01,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:47:01,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:01,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:01,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:01,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:01,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:01,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:01,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283152931] [2020-10-27 19:47:01,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:47:01,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 19:47:01,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841498652] [2020-10-27 19:47:01,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 19:47:01,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:01,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 19:47:01,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 19:47:01,461 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2020-10-27 19:47:01,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:01,590 INFO L93 Difference]: Finished difference Result 64 states and 93 transitions. [2020-10-27 19:47:01,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 19:47:01,592 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-10-27 19:47:01,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:01,606 INFO L225 Difference]: With dead ends: 64 [2020-10-27 19:47:01,606 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 19:47:01,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 19:47:01,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 19:47:01,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-27 19:47:01,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 19:47:01,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-10-27 19:47:01,657 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 21 [2020-10-27 19:47:01,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:01,658 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-10-27 19:47:01,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 19:47:01,658 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-10-27 19:47:01,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 19:47:01,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:01,659 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 19:47:01,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:47:01,660 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:01,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:01,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1663384491, now seen corresponding path program 1 times [2020-10-27 19:47:01,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:01,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629103753] [2020-10-27 19:47:01,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:01,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:01,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:01,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:01,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 19:47:01,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:01,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-27 19:47:01,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:01,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:47:01,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:01,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 19:47:01,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:02,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:02,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:02,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:02,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:02,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:02,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:02,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:47:02,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:02,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:02,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:02,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:02,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 14 [2020-10-27 19:47:02,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:02,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629103753] [2020-10-27 19:47:02,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:47:02,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 19:47:02,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073295788] [2020-10-27 19:47:02,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:47:02,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:02,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:47:02,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:47:02,057 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand 8 states. [2020-10-27 19:47:02,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:02,563 INFO L93 Difference]: Finished difference Result 74 states and 99 transitions. [2020-10-27 19:47:02,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:47:02,564 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-27 19:47:02,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:02,566 INFO L225 Difference]: With dead ends: 74 [2020-10-27 19:47:02,567 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 19:47:02,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:47:02,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 19:47:02,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 40. [2020-10-27 19:47:02,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 19:47:02,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2020-10-27 19:47:02,581 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 22 [2020-10-27 19:47:02,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:02,581 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2020-10-27 19:47:02,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:47:02,582 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2020-10-27 19:47:02,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 19:47:02,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:02,583 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 19:47:02,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:47:02,583 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:02,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:02,584 INFO L82 PathProgramCache]: Analyzing trace with hash 111622871, now seen corresponding path program 1 times [2020-10-27 19:47:02,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:02,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491743349] [2020-10-27 19:47:02,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:02,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:02,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:02,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:02,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:02,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:03,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:03,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 19:47:03,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:47:03,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 781 [2020-10-27 19:47:03,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:03,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 19:47:03,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 19:47:03,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 19:47:03,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:03,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:03,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:03,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:03,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:03,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:03,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:03,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:47:03,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:03,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:03,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:03,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:03,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:47:03,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:03,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491743349] [2020-10-27 19:47:03,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:47:03,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 19:47:03,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032121438] [2020-10-27 19:47:03,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 19:47:03,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:03,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 19:47:03,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:47:03,495 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 7 states. [2020-10-27 19:47:03,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:03,847 INFO L93 Difference]: Finished difference Result 61 states and 78 transitions. [2020-10-27 19:47:03,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:47:03,847 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-27 19:47:03,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:03,849 INFO L225 Difference]: With dead ends: 61 [2020-10-27 19:47:03,849 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 19:47:03,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:47:03,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 19:47:03,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2020-10-27 19:47:03,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 19:47:03,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2020-10-27 19:47:03,859 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 22 [2020-10-27 19:47:03,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:03,859 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2020-10-27 19:47:03,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 19:47:03,859 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2020-10-27 19:47:03,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 19:47:03,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:03,861 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 19:47:03,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:47:03,861 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:03,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:03,862 INFO L82 PathProgramCache]: Analyzing trace with hash 791681241, now seen corresponding path program 1 times [2020-10-27 19:47:03,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:03,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094266905] [2020-10-27 19:47:03,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:03,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:03,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:03,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:03,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:04,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:04,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 19:47:04,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:47:04,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 418 [2020-10-27 19:47:04,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:04,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:47:04,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:04,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 19:47:04,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:04,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:04,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:04,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:04,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:04,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:04,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:04,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:47:04,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:04,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:04,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:04,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:04,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:47:04,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:04,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094266905] [2020-10-27 19:47:04,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:47:04,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 19:47:04,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999185255] [2020-10-27 19:47:04,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:47:04,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:04,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:47:04,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:47:04,435 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand 8 states. [2020-10-27 19:47:04,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:04,697 INFO L93 Difference]: Finished difference Result 88 states and 114 transitions. [2020-10-27 19:47:04,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:47:04,697 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-27 19:47:04,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:04,699 INFO L225 Difference]: With dead ends: 88 [2020-10-27 19:47:04,699 INFO L226 Difference]: Without dead ends: 65 [2020-10-27 19:47:04,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:47:04,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-27 19:47:04,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 44. [2020-10-27 19:47:04,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 19:47:04,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2020-10-27 19:47:04,708 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 22 [2020-10-27 19:47:04,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:04,708 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2020-10-27 19:47:04,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:47:04,709 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2020-10-27 19:47:04,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 19:47:04,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:04,710 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:04,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 19:47:04,710 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:04,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:04,711 INFO L82 PathProgramCache]: Analyzing trace with hash 19277548, now seen corresponding path program 1 times [2020-10-27 19:47:04,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:04,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125698426] [2020-10-27 19:47:04,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:04,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:04,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:04,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:04,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:04,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:05,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:05,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 19:47:05,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:47:05,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 972 [2020-10-27 19:47:05,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:05,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:47:05,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:47:05,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 19:47:05,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:05,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:05,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:05,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:05,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:05,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:05,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:05,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:47:05,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:05,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:05,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:05,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:05,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:05,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:05,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125698426] [2020-10-27 19:47:05,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:47:05,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 19:47:05,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156407474] [2020-10-27 19:47:05,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:47:05,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:05,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:47:05,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:47:05,815 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 6 states. [2020-10-27 19:47:06,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:06,092 INFO L93 Difference]: Finished difference Result 87 states and 112 transitions. [2020-10-27 19:47:06,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:47:06,092 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-27 19:47:06,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:06,094 INFO L225 Difference]: With dead ends: 87 [2020-10-27 19:47:06,094 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 19:47:06,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:47:06,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 19:47:06,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 52. [2020-10-27 19:47:06,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 19:47:06,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2020-10-27 19:47:06,108 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 23 [2020-10-27 19:47:06,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:06,109 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2020-10-27 19:47:06,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:47:06,109 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2020-10-27 19:47:06,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 19:47:06,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:06,110 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 19:47:06,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 19:47:06,111 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:06,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:06,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1378432434, now seen corresponding path program 1 times [2020-10-27 19:47:06,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:06,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497222124] [2020-10-27 19:47:06,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:06,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:06,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:06,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:06,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 19:47:06,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:06,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 589 [2020-10-27 19:47:06,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:06,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:47:06,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:06,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 19:47:06,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:07,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:07,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:07,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:07,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:07,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:07,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:07,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:47:07,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:07,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:07,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:07,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:07,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:07,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:07,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497222124] [2020-10-27 19:47:07,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:07,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:47:07,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189587650] [2020-10-27 19:47:07,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:47:07,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:07,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:47:07,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:47:07,111 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand 11 states. [2020-10-27 19:47:07,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:07,869 INFO L93 Difference]: Finished difference Result 117 states and 154 transitions. [2020-10-27 19:47:07,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:47:07,870 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-10-27 19:47:07,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:07,871 INFO L225 Difference]: With dead ends: 117 [2020-10-27 19:47:07,871 INFO L226 Difference]: Without dead ends: 98 [2020-10-27 19:47:07,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-27 19:47:07,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-27 19:47:07,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 62. [2020-10-27 19:47:07,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 19:47:07,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 82 transitions. [2020-10-27 19:47:07,884 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 82 transitions. Word has length 25 [2020-10-27 19:47:07,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:07,884 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 82 transitions. [2020-10-27 19:47:07,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:47:07,884 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 82 transitions. [2020-10-27 19:47:07,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 19:47:07,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:07,886 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 19:47:07,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 19:47:07,886 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:07,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:07,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1076633298, now seen corresponding path program 1 times [2020-10-27 19:47:07,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:07,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256866655] [2020-10-27 19:47:07,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:07,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:07,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:08,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:08,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:09,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:09,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 19:47:09,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:47:09,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1303 [2020-10-27 19:47:09,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:09,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:47:09,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:09,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 19:47:09,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:09,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:09,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:09,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:09,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:09,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:09,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:09,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:47:09,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:09,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:09,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:09,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:09,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:09,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:09,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256866655] [2020-10-27 19:47:09,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:09,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:47:09,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806231026] [2020-10-27 19:47:09,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:47:09,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:09,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:47:09,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:47:09,485 INFO L87 Difference]: Start difference. First operand 62 states and 82 transitions. Second operand 10 states. [2020-10-27 19:47:09,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:09,900 INFO L93 Difference]: Finished difference Result 107 states and 140 transitions. [2020-10-27 19:47:09,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:47:09,900 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-27 19:47:09,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:09,901 INFO L225 Difference]: With dead ends: 107 [2020-10-27 19:47:09,901 INFO L226 Difference]: Without dead ends: 84 [2020-10-27 19:47:09,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:47:09,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-27 19:47:09,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 54. [2020-10-27 19:47:09,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 19:47:09,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 71 transitions. [2020-10-27 19:47:09,913 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 71 transitions. Word has length 25 [2020-10-27 19:47:09,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:09,913 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 71 transitions. [2020-10-27 19:47:09,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:47:09,913 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 71 transitions. [2020-10-27 19:47:09,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 19:47:09,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:09,914 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:09,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 19:47:09,915 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:09,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:09,915 INFO L82 PathProgramCache]: Analyzing trace with hash 243059799, now seen corresponding path program 1 times [2020-10-27 19:47:09,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:09,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012786191] [2020-10-27 19:47:09,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:09,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:09,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:10,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:10,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:10,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:10,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:10,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:11,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:12,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:14,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:14,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 19:47:14,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 19:47:14,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4298 [2020-10-27 19:47:14,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:14,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:47:14,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:14,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 19:47:14,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:14,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:14,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:14,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:14,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:14,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:14,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:14,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:47:14,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:14,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:14,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:14,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:14,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:14,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:14,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012786191] [2020-10-27 19:47:14,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:14,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:47:14,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378506703] [2020-10-27 19:47:14,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:47:14,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:14,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:47:14,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:47:14,425 INFO L87 Difference]: Start difference. First operand 54 states and 71 transitions. Second operand 11 states. [2020-10-27 19:47:15,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:15,249 INFO L93 Difference]: Finished difference Result 121 states and 161 transitions. [2020-10-27 19:47:15,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 19:47:15,252 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-27 19:47:15,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:15,253 INFO L225 Difference]: With dead ends: 121 [2020-10-27 19:47:15,253 INFO L226 Difference]: Without dead ends: 102 [2020-10-27 19:47:15,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2020-10-27 19:47:15,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-27 19:47:15,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 57. [2020-10-27 19:47:15,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 19:47:15,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 73 transitions. [2020-10-27 19:47:15,265 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 73 transitions. Word has length 26 [2020-10-27 19:47:15,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:15,265 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 73 transitions. [2020-10-27 19:47:15,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:47:15,266 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 73 transitions. [2020-10-27 19:47:15,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 19:47:15,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:15,267 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:15,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 19:47:15,267 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:15,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:15,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1596841765, now seen corresponding path program 1 times [2020-10-27 19:47:15,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:15,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86618896] [2020-10-27 19:47:15,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:15,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:15,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:15,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 19:47:15,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:15,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 181 [2020-10-27 19:47:15,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:15,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:47:15,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:15,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 19:47:15,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:15,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:15,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:15,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:15,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:15,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:15,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:15,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:47:15,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:15,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:15,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:15,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:15,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:15,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:15,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [86618896] [2020-10-27 19:47:15,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:15,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:47:15,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413472810] [2020-10-27 19:47:15,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:47:15,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:15,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:47:15,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:47:15,675 INFO L87 Difference]: Start difference. First operand 57 states and 73 transitions. Second operand 10 states. [2020-10-27 19:47:16,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:16,335 INFO L93 Difference]: Finished difference Result 95 states and 120 transitions. [2020-10-27 19:47:16,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:47:16,336 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-27 19:47:16,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:16,337 INFO L225 Difference]: With dead ends: 95 [2020-10-27 19:47:16,337 INFO L226 Difference]: Without dead ends: 91 [2020-10-27 19:47:16,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:47:16,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-27 19:47:16,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 51. [2020-10-27 19:47:16,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 19:47:16,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2020-10-27 19:47:16,357 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 26 [2020-10-27 19:47:16,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:16,358 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2020-10-27 19:47:16,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:47:16,358 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2020-10-27 19:47:16,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 19:47:16,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:16,362 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:16,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 19:47:16,363 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:16,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:16,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1672684518, now seen corresponding path program 1 times [2020-10-27 19:47:16,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:16,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906510563] [2020-10-27 19:47:16,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:16,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:16,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:16,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:16,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 19:47:16,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:16,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-27 19:47:16,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:16,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 19:47:16,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:16,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 19:47:16,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:16,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:16,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:16,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:16,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:16,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:16,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:16,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:47:16,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:16,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:16,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:16,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:16,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:16,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:16,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1906510563] [2020-10-27 19:47:16,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:16,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 19:47:16,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133943905] [2020-10-27 19:47:16,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 19:47:16,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:16,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 19:47:16,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:47:16,596 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand 7 states. [2020-10-27 19:47:16,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:16,860 INFO L93 Difference]: Finished difference Result 94 states and 117 transitions. [2020-10-27 19:47:16,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:47:16,861 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-10-27 19:47:16,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:16,862 INFO L225 Difference]: With dead ends: 94 [2020-10-27 19:47:16,862 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 19:47:16,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:47:16,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 19:47:16,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-27 19:47:16,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 19:47:16,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2020-10-27 19:47:16,872 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 32 [2020-10-27 19:47:16,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:16,872 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2020-10-27 19:47:16,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 19:47:16,873 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2020-10-27 19:47:16,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 19:47:16,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:16,874 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:16,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 19:47:16,874 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:16,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:16,875 INFO L82 PathProgramCache]: Analyzing trace with hash -331841837, now seen corresponding path program 1 times [2020-10-27 19:47:16,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:16,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279198336] [2020-10-27 19:47:16,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:16,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:16,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:17,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:17,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:18,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:18,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 19:47:18,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:47:18,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1280 [2020-10-27 19:47:18,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:18,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:47:18,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:18,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 19:47:18,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:18,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:18,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:18,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:18,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:18,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:18,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:18,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:47:18,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:18,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:18,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:18,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:18,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:47:18,619 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:18,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279198336] [2020-10-27 19:47:18,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:18,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:47:18,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613701012] [2020-10-27 19:47:18,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:47:18,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:18,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:47:18,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:47:18,623 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand 11 states. [2020-10-27 19:47:19,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:19,859 INFO L93 Difference]: Finished difference Result 146 states and 186 transitions. [2020-10-27 19:47:19,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 19:47:19,860 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-27 19:47:19,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:19,861 INFO L225 Difference]: With dead ends: 146 [2020-10-27 19:47:19,861 INFO L226 Difference]: Without dead ends: 127 [2020-10-27 19:47:19,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2020-10-27 19:47:19,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-27 19:47:19,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83. [2020-10-27 19:47:19,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 19:47:19,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2020-10-27 19:47:19,877 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 35 [2020-10-27 19:47:19,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:19,877 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2020-10-27 19:47:19,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:47:19,877 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2020-10-27 19:47:19,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 19:47:19,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:19,879 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:19,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 19:47:19,879 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:19,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:19,879 INFO L82 PathProgramCache]: Analyzing trace with hash 2123223895, now seen corresponding path program 1 times [2020-10-27 19:47:19,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:19,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85597442] [2020-10-27 19:47:19,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:19,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:19,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:20,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:20,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:20,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:21,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:21,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:21,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:21,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:22,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:23,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:23,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 19:47:23,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 19:47:23,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3618 [2020-10-27 19:47:23,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:23,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:47:23,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:23,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 19:47:23,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:23,716 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2020-10-27 19:47:23,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:23,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:23,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:23,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:23,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:23,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:23,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:47:23,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:23,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:23,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:23,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:23,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:23,959 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:23,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85597442] [2020-10-27 19:47:23,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:23,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:47:23,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977196776] [2020-10-27 19:47:23,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:47:23,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:23,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:47:23,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:47:23,961 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand 12 states. [2020-10-27 19:47:25,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:25,124 INFO L93 Difference]: Finished difference Result 140 states and 178 transitions. [2020-10-27 19:47:25,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 19:47:25,124 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-27 19:47:25,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:25,125 INFO L225 Difference]: With dead ends: 140 [2020-10-27 19:47:25,126 INFO L226 Difference]: Without dead ends: 121 [2020-10-27 19:47:25,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-10-27 19:47:25,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-27 19:47:25,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 80. [2020-10-27 19:47:25,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-27 19:47:25,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 101 transitions. [2020-10-27 19:47:25,140 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 101 transitions. Word has length 35 [2020-10-27 19:47:25,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:25,140 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 101 transitions. [2020-10-27 19:47:25,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:47:25,141 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 101 transitions. [2020-10-27 19:47:25,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 19:47:25,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:25,142 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:25,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 19:47:25,143 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:25,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:25,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1334779298, now seen corresponding path program 1 times [2020-10-27 19:47:25,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:25,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993699435] [2020-10-27 19:47:25,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:25,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:25,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:25,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:25,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:25,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:25,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:25,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:25,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:26,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:27,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:27,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:27,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:27,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:27,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:27,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:27,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:28,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:28,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:28,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:28,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:29,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:30,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:30,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 19:47:30,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-27 19:47:30,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 19:47:30,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:30,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:47:30,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:30,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 19:47:30,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:30,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:30,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:30,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:30,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:30,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:30,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:30,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:30,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:30,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:30,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:30,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:30,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:30,489 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:30,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993699435] [2020-10-27 19:47:30,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:30,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:47:30,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438931739] [2020-10-27 19:47:30,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:47:30,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:30,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:47:30,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:47:30,491 INFO L87 Difference]: Start difference. First operand 80 states and 101 transitions. Second operand 14 states. [2020-10-27 19:47:32,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:32,138 INFO L93 Difference]: Finished difference Result 204 states and 257 transitions. [2020-10-27 19:47:32,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 19:47:32,141 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-27 19:47:32,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:32,145 INFO L225 Difference]: With dead ends: 204 [2020-10-27 19:47:32,146 INFO L226 Difference]: Without dead ends: 185 [2020-10-27 19:47:32,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=285, Invalid=975, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 19:47:32,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-27 19:47:32,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 97. [2020-10-27 19:47:32,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 19:47:32,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 122 transitions. [2020-10-27 19:47:32,168 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 122 transitions. Word has length 36 [2020-10-27 19:47:32,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:32,168 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 122 transitions. [2020-10-27 19:47:32,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:47:32,168 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 122 transitions. [2020-10-27 19:47:32,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 19:47:32,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:32,171 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:32,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 19:47:32,171 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:32,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:32,172 INFO L82 PathProgramCache]: Analyzing trace with hash -505122266, now seen corresponding path program 1 times [2020-10-27 19:47:32,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:32,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233877451] [2020-10-27 19:47:32,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:32,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:32,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:32,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:32,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:32,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:32,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:33,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:33,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 19:47:33,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:47:33,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1488 [2020-10-27 19:47:33,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:33,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:47:33,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:33,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 19:47:33,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:33,927 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2020-10-27 19:47:34,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:34,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:34,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:34,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:34,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:34,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:34,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:47:34,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:34,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:34,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:34,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:34,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:34,104 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:34,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233877451] [2020-10-27 19:47:34,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:34,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:47:34,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741474730] [2020-10-27 19:47:34,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:47:34,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:34,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:47:34,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:47:34,107 INFO L87 Difference]: Start difference. First operand 97 states and 122 transitions. Second operand 11 states. [2020-10-27 19:47:35,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:35,079 INFO L93 Difference]: Finished difference Result 152 states and 190 transitions. [2020-10-27 19:47:35,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 19:47:35,079 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-10-27 19:47:35,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:35,081 INFO L225 Difference]: With dead ends: 152 [2020-10-27 19:47:35,081 INFO L226 Difference]: Without dead ends: 148 [2020-10-27 19:47:35,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2020-10-27 19:47:35,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-27 19:47:35,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 113. [2020-10-27 19:47:35,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-27 19:47:35,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 143 transitions. [2020-10-27 19:47:35,098 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 143 transitions. Word has length 36 [2020-10-27 19:47:35,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:35,099 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 143 transitions. [2020-10-27 19:47:35,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:47:35,099 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 143 transitions. [2020-10-27 19:47:35,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 19:47:35,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:35,100 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:35,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 19:47:35,100 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:35,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:35,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1516615034, now seen corresponding path program 2 times [2020-10-27 19:47:35,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:35,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701387586] [2020-10-27 19:47:35,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:35,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:35,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:35,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:35,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:36,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:36,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 19:47:36,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:47:36,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1511 [2020-10-27 19:47:36,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:36,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:47:36,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:36,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 19:47:36,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:37,009 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-10-27 19:47:37,249 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 49 [2020-10-27 19:47:37,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:37,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:37,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:37,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:37,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:37,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:37,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:37,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:37,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:37,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:37,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:37,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:37,634 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:37,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701387586] [2020-10-27 19:47:37,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:37,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:47:37,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548744439] [2020-10-27 19:47:37,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:47:37,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:37,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:47:37,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:47:37,638 INFO L87 Difference]: Start difference. First operand 113 states and 143 transitions. Second operand 14 states. [2020-10-27 19:47:38,231 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2020-10-27 19:47:38,665 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2020-10-27 19:47:39,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:39,540 INFO L93 Difference]: Finished difference Result 222 states and 281 transitions. [2020-10-27 19:47:39,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 19:47:39,541 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-27 19:47:39,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:39,542 INFO L225 Difference]: With dead ends: 222 [2020-10-27 19:47:39,542 INFO L226 Difference]: Without dead ends: 203 [2020-10-27 19:47:39,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2020-10-27 19:47:39,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-27 19:47:39,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 141. [2020-10-27 19:47:39,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-27 19:47:39,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 179 transitions. [2020-10-27 19:47:39,565 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 179 transitions. Word has length 38 [2020-10-27 19:47:39,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:39,565 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 179 transitions. [2020-10-27 19:47:39,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:47:39,565 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 179 transitions. [2020-10-27 19:47:39,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 19:47:39,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:39,566 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:39,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 19:47:39,567 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:39,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:39,567 INFO L82 PathProgramCache]: Analyzing trace with hash -323286530, now seen corresponding path program 2 times [2020-10-27 19:47:39,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:39,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906281382] [2020-10-27 19:47:39,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:39,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:39,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:39,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:39,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:40,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:40,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:40,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:41,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:41,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:41,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:43,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:43,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 19:47:43,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 19:47:43,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4038 [2020-10-27 19:47:43,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:43,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:47:43,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:43,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 19:47:43,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:44,073 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-10-27 19:47:44,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:44,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:44,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:44,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:44,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:44,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:44,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:47:44,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:44,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:44,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:44,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:44,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:44,324 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:44,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906281382] [2020-10-27 19:47:44,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:44,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 19:47:44,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627541842] [2020-10-27 19:47:44,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 19:47:44,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:44,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 19:47:44,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:47:44,326 INFO L87 Difference]: Start difference. First operand 141 states and 179 transitions. Second operand 15 states. [2020-10-27 19:47:44,785 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-10-27 19:47:45,029 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-27 19:47:45,254 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-10-27 19:47:45,508 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-27 19:47:46,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:46,140 INFO L93 Difference]: Finished difference Result 248 states and 314 transitions. [2020-10-27 19:47:46,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 19:47:46,141 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-27 19:47:46,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:46,144 INFO L225 Difference]: With dead ends: 248 [2020-10-27 19:47:46,144 INFO L226 Difference]: Without dead ends: 229 [2020-10-27 19:47:46,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2020-10-27 19:47:46,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-27 19:47:46,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 147. [2020-10-27 19:47:46,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-27 19:47:46,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 188 transitions. [2020-10-27 19:47:46,168 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 188 transitions. Word has length 38 [2020-10-27 19:47:46,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:46,169 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 188 transitions. [2020-10-27 19:47:46,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 19:47:46,169 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 188 transitions. [2020-10-27 19:47:46,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 19:47:46,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:46,170 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:46,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 19:47:46,170 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:46,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:46,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1492599845, now seen corresponding path program 1 times [2020-10-27 19:47:46,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:46,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934100870] [2020-10-27 19:47:46,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:46,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:46,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:46,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:46,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:47,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:47,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 19:47:47,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:47:47,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1371 [2020-10-27 19:47:47,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:47,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:47:47,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:47,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 19:47:47,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:47,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:47,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:47,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:47,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:47,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:47,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:47,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:47,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:47,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:47,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:47,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:47,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:47,928 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:47,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934100870] [2020-10-27 19:47:47,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:47,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:47:47,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795992859] [2020-10-27 19:47:47,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:47:47,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:47,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:47:47,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:47:47,931 INFO L87 Difference]: Start difference. First operand 147 states and 188 transitions. Second operand 13 states. [2020-10-27 19:47:49,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:49,115 INFO L93 Difference]: Finished difference Result 259 states and 331 transitions. [2020-10-27 19:47:49,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 19:47:49,116 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-10-27 19:47:49,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:49,118 INFO L225 Difference]: With dead ends: 259 [2020-10-27 19:47:49,118 INFO L226 Difference]: Without dead ends: 240 [2020-10-27 19:47:49,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2020-10-27 19:47:49,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-27 19:47:49,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 175. [2020-10-27 19:47:49,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-27 19:47:49,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 224 transitions. [2020-10-27 19:47:49,144 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 224 transitions. Word has length 39 [2020-10-27 19:47:49,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:49,144 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 224 transitions. [2020-10-27 19:47:49,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:47:49,144 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 224 transitions. [2020-10-27 19:47:49,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 19:47:49,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:49,145 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:49,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 19:47:49,145 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:49,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:49,146 INFO L82 PathProgramCache]: Analyzing trace with hash 962465887, now seen corresponding path program 1 times [2020-10-27 19:47:49,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:49,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177073090] [2020-10-27 19:47:49,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:49,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:49,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:49,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:49,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:49,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:50,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:50,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:50,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:50,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:51,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:53,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:53,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 19:47:53,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 19:47:53,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3932 [2020-10-27 19:47:53,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:53,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:47:53,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:53,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 19:47:53,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:53,446 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-10-27 19:47:53,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:53,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:53,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:53,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:53,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:53,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:53,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:53,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:53,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:53,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:53,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:53,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:53,633 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:53,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177073090] [2020-10-27 19:47:53,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:53,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:47:53,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868477187] [2020-10-27 19:47:53,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:47:53,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:53,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:47:53,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:47:53,636 INFO L87 Difference]: Start difference. First operand 175 states and 224 transitions. Second operand 12 states. [2020-10-27 19:47:54,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:54,732 INFO L93 Difference]: Finished difference Result 224 states and 284 transitions. [2020-10-27 19:47:54,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 19:47:54,733 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-27 19:47:54,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:54,735 INFO L225 Difference]: With dead ends: 224 [2020-10-27 19:47:54,735 INFO L226 Difference]: Without dead ends: 205 [2020-10-27 19:47:54,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-27 19:47:54,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-27 19:47:54,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 153. [2020-10-27 19:47:54,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-27 19:47:54,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 198 transitions. [2020-10-27 19:47:54,763 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 198 transitions. Word has length 39 [2020-10-27 19:47:54,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:54,763 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 198 transitions. [2020-10-27 19:47:54,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:47:54,763 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 198 transitions. [2020-10-27 19:47:54,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 19:47:54,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:54,764 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:54,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 19:47:54,764 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:54,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:54,765 INFO L82 PathProgramCache]: Analyzing trace with hash 2004906059, now seen corresponding path program 2 times [2020-10-27 19:47:54,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:54,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568221761] [2020-10-27 19:47:54,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:54,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:54,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:55,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:55,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:55,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:55,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:55,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:55,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:56,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:57,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:57,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:57,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:57,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:57,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:58,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:58,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:58,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:58,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:58,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:59,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:59,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 19:47:59,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-27 19:47:59,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 19:47:59,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:59,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:47:59,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:59,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 19:47:59,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:00,144 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2020-10-27 19:48:00,400 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 54 [2020-10-27 19:48:00,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:00,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:00,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:00,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:00,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:00,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:00,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:00,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:00,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:00,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:00,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:00,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:00,981 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 19:48:00,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568221761] [2020-10-27 19:48:00,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:00,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 19:48:00,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575995169] [2020-10-27 19:48:00,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 19:48:00,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:00,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 19:48:00,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:48:00,984 INFO L87 Difference]: Start difference. First operand 153 states and 198 transitions. Second operand 16 states. [2020-10-27 19:48:02,182 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-10-27 19:48:02,741 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2020-10-27 19:48:03,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:03,322 INFO L93 Difference]: Finished difference Result 247 states and 315 transitions. [2020-10-27 19:48:03,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 19:48:03,322 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-27 19:48:03,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:03,325 INFO L225 Difference]: With dead ends: 247 [2020-10-27 19:48:03,325 INFO L226 Difference]: Without dead ends: 243 [2020-10-27 19:48:03,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=222, Invalid=900, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 19:48:03,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-27 19:48:03,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 181. [2020-10-27 19:48:03,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-27 19:48:03,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 237 transitions. [2020-10-27 19:48:03,355 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 237 transitions. Word has length 39 [2020-10-27 19:48:03,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:03,356 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 237 transitions. [2020-10-27 19:48:03,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 19:48:03,356 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 237 transitions. [2020-10-27 19:48:03,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 19:48:03,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:03,357 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:48:03,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 19:48:03,357 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:03,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:03,358 INFO L82 PathProgramCache]: Analyzing trace with hash -863305521, now seen corresponding path program 1 times [2020-10-27 19:48:03,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:03,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329022793] [2020-10-27 19:48:03,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:03,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:03,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:03,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:03,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:03,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:04,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:04,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:04,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:04,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:05,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:05,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:05,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:06,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:08,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:08,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:08,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 19:48:08,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 19:48:08,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 19:48:08,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:08,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:48:08,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:08,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 19:48:08,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:48:08,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:08,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:08,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:08,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:08,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:08,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:08,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:48:08,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:08,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:08,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:08,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:08,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:08,613 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:08,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329022793] [2020-10-27 19:48:08,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:08,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:48:08,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947536105] [2020-10-27 19:48:08,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:48:08,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:08,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:48:08,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:48:08,616 INFO L87 Difference]: Start difference. First operand 181 states and 237 transitions. Second operand 10 states. [2020-10-27 19:48:09,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:09,018 INFO L93 Difference]: Finished difference Result 292 states and 370 transitions. [2020-10-27 19:48:09,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 19:48:09,018 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-27 19:48:09,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:09,020 INFO L225 Difference]: With dead ends: 292 [2020-10-27 19:48:09,020 INFO L226 Difference]: Without dead ends: 246 [2020-10-27 19:48:09,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:48:09,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-27 19:48:09,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 186. [2020-10-27 19:48:09,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-27 19:48:09,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 243 transitions. [2020-10-27 19:48:09,053 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 243 transitions. Word has length 39 [2020-10-27 19:48:09,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:09,054 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 243 transitions. [2020-10-27 19:48:09,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:48:09,054 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 243 transitions. [2020-10-27 19:48:09,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 19:48:09,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:09,055 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:48:09,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 19:48:09,055 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:09,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:09,056 INFO L82 PathProgramCache]: Analyzing trace with hash -230932712, now seen corresponding path program 1 times [2020-10-27 19:48:09,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:09,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897466650] [2020-10-27 19:48:09,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:09,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:09,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:09,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:09,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:09,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:10,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:10,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:11,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:11,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:12,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:13,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:13,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:13,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:13,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:14,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:14,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:14,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 19:48:14,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 19:48:14,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-27 19:48:14,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:14,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:48:14,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:48:14,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 19:48:14,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:14,619 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 59 [2020-10-27 19:48:14,878 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 60 [2020-10-27 19:48:15,295 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 79 [2020-10-27 19:48:15,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:15,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:15,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:15,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:15,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:15,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:15,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:48:15,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:15,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:15,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:15,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:15,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:15,838 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:15,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897466650] [2020-10-27 19:48:15,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:15,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 19:48:15,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452682102] [2020-10-27 19:48:15,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 19:48:15,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:15,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 19:48:15,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:48:15,840 INFO L87 Difference]: Start difference. First operand 186 states and 243 transitions. Second operand 16 states. [2020-10-27 19:48:16,531 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2020-10-27 19:48:16,897 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-27 19:48:17,390 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 94 [2020-10-27 19:48:18,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:18,529 INFO L93 Difference]: Finished difference Result 378 states and 488 transitions. [2020-10-27 19:48:18,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 19:48:18,530 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-27 19:48:18,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:18,533 INFO L225 Difference]: With dead ends: 378 [2020-10-27 19:48:18,533 INFO L226 Difference]: Without dead ends: 357 [2020-10-27 19:48:18,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2020-10-27 19:48:18,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-10-27 19:48:18,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 227. [2020-10-27 19:48:18,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-27 19:48:18,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 295 transitions. [2020-10-27 19:48:18,575 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 295 transitions. Word has length 40 [2020-10-27 19:48:18,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:18,575 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 295 transitions. [2020-10-27 19:48:18,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 19:48:18,576 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 295 transitions. [2020-10-27 19:48:18,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 19:48:18,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:18,577 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:48:18,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 19:48:18,577 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:18,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:18,577 INFO L82 PathProgramCache]: Analyzing trace with hash -2070834276, now seen corresponding path program 1 times [2020-10-27 19:48:18,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:18,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294111461] [2020-10-27 19:48:18,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:18,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:18,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:18,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:18,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:19,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:19,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:20,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:20,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:20,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:22,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:22,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 19:48:22,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 19:48:22,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3913 [2020-10-27 19:48:22,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:22,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 19:48:22,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:48:22,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 19:48:22,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:22,865 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 56 [2020-10-27 19:48:23,190 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 64 [2020-10-27 19:48:23,528 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 97 [2020-10-27 19:48:23,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:23,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:23,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:23,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:23,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:23,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:23,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:23,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:23,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:23,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:23,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:23,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:24,016 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 19:48:24,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294111461] [2020-10-27 19:48:24,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:24,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 19:48:24,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817596210] [2020-10-27 19:48:24,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 19:48:24,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:24,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 19:48:24,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:48:24,017 INFO L87 Difference]: Start difference. First operand 227 states and 295 transitions. Second operand 17 states. [2020-10-27 19:48:24,831 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 72 [2020-10-27 19:48:25,006 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-10-27 19:48:25,315 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-27 19:48:25,849 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 114 [2020-10-27 19:48:26,186 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 101 [2020-10-27 19:48:27,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:27,632 INFO L93 Difference]: Finished difference Result 376 states and 480 transitions. [2020-10-27 19:48:27,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 19:48:27,634 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2020-10-27 19:48:27,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:27,636 INFO L225 Difference]: With dead ends: 376 [2020-10-27 19:48:27,636 INFO L226 Difference]: Without dead ends: 372 [2020-10-27 19:48:27,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=217, Invalid=1189, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 19:48:27,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-10-27 19:48:27,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 217. [2020-10-27 19:48:27,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-27 19:48:27,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 284 transitions. [2020-10-27 19:48:27,681 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 284 transitions. Word has length 40 [2020-10-27 19:48:27,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:27,681 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 284 transitions. [2020-10-27 19:48:27,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 19:48:27,681 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 284 transitions. [2020-10-27 19:48:27,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 19:48:27,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:27,682 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:48:27,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 19:48:27,682 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:27,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:27,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1919876454, now seen corresponding path program 1 times [2020-10-27 19:48:27,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:27,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271124244] [2020-10-27 19:48:27,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:27,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:27,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:27,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:27,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:28,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:28,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:28,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:30,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:30,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 19:48:30,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 19:48:30,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3139 [2020-10-27 19:48:30,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:30,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:48:30,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:30,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 19:48:30,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:31,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:31,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:31,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:31,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:31,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:31,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:31,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:31,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:31,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:31,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:31,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:31,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:31,091 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:31,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271124244] [2020-10-27 19:48:31,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:31,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:48:31,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715136501] [2020-10-27 19:48:31,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:48:31,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:31,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:48:31,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:48:31,093 INFO L87 Difference]: Start difference. First operand 217 states and 284 transitions. Second operand 12 states. [2020-10-27 19:48:32,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:32,068 INFO L93 Difference]: Finished difference Result 454 states and 587 transitions. [2020-10-27 19:48:32,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 19:48:32,069 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-10-27 19:48:32,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:32,071 INFO L225 Difference]: With dead ends: 454 [2020-10-27 19:48:32,071 INFO L226 Difference]: Without dead ends: 431 [2020-10-27 19:48:32,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:48:32,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2020-10-27 19:48:32,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 277. [2020-10-27 19:48:32,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-27 19:48:32,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 365 transitions. [2020-10-27 19:48:32,122 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 365 transitions. Word has length 40 [2020-10-27 19:48:32,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:32,122 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 365 transitions. [2020-10-27 19:48:32,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:48:32,122 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 365 transitions. [2020-10-27 19:48:32,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 19:48:32,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:32,123 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:48:32,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 19:48:32,123 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:32,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:32,124 INFO L82 PathProgramCache]: Analyzing trace with hash 535189278, now seen corresponding path program 1 times [2020-10-27 19:48:32,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:32,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271053707] [2020-10-27 19:48:32,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:32,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:32,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:32,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:32,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:32,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 19:48:32,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:48:32,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 534 [2020-10-27 19:48:32,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:32,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:48:32,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:32,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 19:48:32,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:32,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:32,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:32,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:32,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:32,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:32,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:32,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:32,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:32,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:32,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:32,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:32,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:33,020 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 19:48:33,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271053707] [2020-10-27 19:48:33,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:33,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:48:33,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759510915] [2020-10-27 19:48:33,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:48:33,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:33,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:48:33,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:48:33,025 INFO L87 Difference]: Start difference. First operand 277 states and 365 transitions. Second operand 12 states. [2020-10-27 19:48:34,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:34,000 INFO L93 Difference]: Finished difference Result 365 states and 474 transitions. [2020-10-27 19:48:34,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 19:48:34,001 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-10-27 19:48:34,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:34,003 INFO L225 Difference]: With dead ends: 365 [2020-10-27 19:48:34,003 INFO L226 Difference]: Without dead ends: 361 [2020-10-27 19:48:34,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2020-10-27 19:48:34,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2020-10-27 19:48:34,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 202. [2020-10-27 19:48:34,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-27 19:48:34,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 263 transitions. [2020-10-27 19:48:34,033 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 263 transitions. Word has length 40 [2020-10-27 19:48:34,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:34,034 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 263 transitions. [2020-10-27 19:48:34,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:48:34,034 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 263 transitions. [2020-10-27 19:48:34,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 19:48:34,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:34,035 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:48:34,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 19:48:34,035 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:34,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:34,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1175410317, now seen corresponding path program 3 times [2020-10-27 19:48:34,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:34,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953624408] [2020-10-27 19:48:34,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:34,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:34,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:34,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:35,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:35,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:35,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 19:48:35,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:48:35,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1884 [2020-10-27 19:48:35,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:35,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:48:35,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:35,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 19:48:35,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:36,316 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-27 19:48:36,519 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-10-27 19:48:36,703 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2020-10-27 19:48:37,128 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 49 [2020-10-27 19:48:37,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:37,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:37,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:37,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:37,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:37,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:37,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:37,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:37,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:37,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:37,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:37,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:37,428 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:37,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [953624408] [2020-10-27 19:48:37,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:37,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 19:48:37,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392423520] [2020-10-27 19:48:37,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 19:48:37,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:37,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 19:48:37,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:48:37,430 INFO L87 Difference]: Start difference. First operand 202 states and 263 transitions. Second operand 16 states. [2020-10-27 19:48:37,900 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-10-27 19:48:38,217 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-27 19:48:38,492 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2020-10-27 19:48:38,799 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-27 19:48:39,314 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2020-10-27 19:48:40,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:40,289 INFO L93 Difference]: Finished difference Result 342 states and 435 transitions. [2020-10-27 19:48:40,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 19:48:40,290 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2020-10-27 19:48:40,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:40,293 INFO L225 Difference]: With dead ends: 342 [2020-10-27 19:48:40,293 INFO L226 Difference]: Without dead ends: 323 [2020-10-27 19:48:40,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=196, Invalid=994, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 19:48:40,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-10-27 19:48:40,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 208. [2020-10-27 19:48:40,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-27 19:48:40,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 273 transitions. [2020-10-27 19:48:40,336 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 273 transitions. Word has length 41 [2020-10-27 19:48:40,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:40,336 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 273 transitions. [2020-10-27 19:48:40,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 19:48:40,336 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 273 transitions. [2020-10-27 19:48:40,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 19:48:40,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:40,337 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:48:40,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 19:48:40,337 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:40,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:40,338 INFO L82 PathProgramCache]: Analyzing trace with hash 953960194, now seen corresponding path program 3 times [2020-10-27 19:48:40,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:40,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127125200] [2020-10-27 19:48:40,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:40,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:40,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:41,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:42,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:42,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:42,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 19:48:42,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:48:42,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2499 [2020-10-27 19:48:42,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:42,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:48:42,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:42,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 19:48:42,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:43,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:43,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:43,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:43,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:43,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:43,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:43,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:48:43,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:43,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:43,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:43,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:43,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:43,413 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:43,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127125200] [2020-10-27 19:48:43,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:43,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 19:48:43,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684566985] [2020-10-27 19:48:43,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 19:48:43,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:43,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 19:48:43,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:48:43,416 INFO L87 Difference]: Start difference. First operand 208 states and 273 transitions. Second operand 15 states. [2020-10-27 19:48:44,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:44,710 INFO L93 Difference]: Finished difference Result 367 states and 474 transitions. [2020-10-27 19:48:44,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 19:48:44,710 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-10-27 19:48:44,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:44,712 INFO L225 Difference]: With dead ends: 367 [2020-10-27 19:48:44,713 INFO L226 Difference]: Without dead ends: 348 [2020-10-27 19:48:44,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2020-10-27 19:48:44,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-10-27 19:48:44,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 191. [2020-10-27 19:48:44,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-27 19:48:44,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 250 transitions. [2020-10-27 19:48:44,758 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 250 transitions. Word has length 42 [2020-10-27 19:48:44,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:44,759 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 250 transitions. [2020-10-27 19:48:44,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 19:48:44,759 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 250 transitions. [2020-10-27 19:48:44,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 19:48:44,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:44,760 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2020-10-27 19:48:44,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 19:48:44,760 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:44,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:44,765 INFO L82 PathProgramCache]: Analyzing trace with hash -885941370, now seen corresponding path program 2 times [2020-10-27 19:48:44,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:44,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629919961] [2020-10-27 19:48:44,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:44,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:44,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:45,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:45,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:45,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:46,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:46,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:46,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:47,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:47,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:49,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:49,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 19:48:49,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 19:48:49,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 19:48:49,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:49,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 19:48:49,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:49,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 19:48:49,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:50,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:50,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:50,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:50,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:50,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:50,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:50,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:48:50,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:50,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:50,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:50,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:50,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:50,124 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:50,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629919961] [2020-10-27 19:48:50,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:50,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 19:48:50,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060123891] [2020-10-27 19:48:50,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 19:48:50,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:50,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 19:48:50,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:48:50,126 INFO L87 Difference]: Start difference. First operand 191 states and 250 transitions. Second operand 15 states. [2020-10-27 19:48:51,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:51,035 INFO L93 Difference]: Finished difference Result 249 states and 321 transitions. [2020-10-27 19:48:51,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 19:48:51,036 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-10-27 19:48:51,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:51,037 INFO L225 Difference]: With dead ends: 249 [2020-10-27 19:48:51,037 INFO L226 Difference]: Without dead ends: 230 [2020-10-27 19:48:51,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-10-27 19:48:51,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-27 19:48:51,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 151. [2020-10-27 19:48:51,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-27 19:48:51,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 194 transitions. [2020-10-27 19:48:51,072 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 194 transitions. Word has length 42 [2020-10-27 19:48:51,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:51,072 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 194 transitions. [2020-10-27 19:48:51,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 19:48:51,072 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 194 transitions. [2020-10-27 19:48:51,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 19:48:51,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:51,073 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:48:51,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 19:48:51,074 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:51,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:51,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1915088616, now seen corresponding path program 4 times [2020-10-27 19:48:51,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:51,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155514416] [2020-10-27 19:48:51,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:51,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:51,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:51,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:51,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:51,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:51,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 19:48:51,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:48:51,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 862 [2020-10-27 19:48:51,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:51,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:48:51,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:51,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 19:48:51,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:52,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:52,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:52,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:52,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:52,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:52,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:52,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:52,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:52,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:52,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:52,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:52,224 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 24 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:52,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155514416] [2020-10-27 19:48:52,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:52,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:48:52,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896835130] [2020-10-27 19:48:52,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:48:52,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:52,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:48:52,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:48:52,225 INFO L87 Difference]: Start difference. First operand 151 states and 194 transitions. Second operand 10 states. [2020-10-27 19:48:52,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:52,880 INFO L93 Difference]: Finished difference Result 254 states and 318 transitions. [2020-10-27 19:48:52,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:48:52,881 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-10-27 19:48:52,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:52,882 INFO L225 Difference]: With dead ends: 254 [2020-10-27 19:48:52,882 INFO L226 Difference]: Without dead ends: 147 [2020-10-27 19:48:52,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:48:52,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-27 19:48:52,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2020-10-27 19:48:52,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-27 19:48:52,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 187 transitions. [2020-10-27 19:48:52,910 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 187 transitions. Word has length 45 [2020-10-27 19:48:52,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:52,911 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 187 transitions. [2020-10-27 19:48:52,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:48:52,911 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 187 transitions. [2020-10-27 19:48:52,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 19:48:52,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:52,912 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:48:52,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 19:48:52,912 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:52,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:52,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1185702655, now seen corresponding path program 5 times [2020-10-27 19:48:52,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:52,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1622971926] [2020-10-27 19:48:52,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:52,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:52,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:53,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:54,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:54,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:54,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 19:48:54,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:48:54,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1961 [2020-10-27 19:48:54,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:54,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:48:54,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:54,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 19:48:54,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:55,120 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2020-10-27 19:48:55,281 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2020-10-27 19:48:55,512 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2020-10-27 19:48:55,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:55,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:55,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:55,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:55,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:55,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:55,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:55,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:55,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:55,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:55,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:55,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:56,003 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:56,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1622971926] [2020-10-27 19:48:56,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:56,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:48:56,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864238608] [2020-10-27 19:48:56,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:48:56,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:56,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:48:56,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:48:56,005 INFO L87 Difference]: Start difference. First operand 147 states and 187 transitions. Second operand 14 states. [2020-10-27 19:48:56,400 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2020-10-27 19:48:56,807 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-10-27 19:48:57,029 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-10-27 19:48:57,229 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-27 19:48:58,006 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-10-27 19:48:58,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:58,525 INFO L93 Difference]: Finished difference Result 332 states and 424 transitions. [2020-10-27 19:48:58,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 19:48:58,525 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-10-27 19:48:58,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:58,527 INFO L225 Difference]: With dead ends: 332 [2020-10-27 19:48:58,527 INFO L226 Difference]: Without dead ends: 313 [2020-10-27 19:48:58,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2020-10-27 19:48:58,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-27 19:48:58,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 253. [2020-10-27 19:48:58,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-27 19:48:58,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 325 transitions. [2020-10-27 19:48:58,573 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 325 transitions. Word has length 48 [2020-10-27 19:48:58,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:58,573 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 325 transitions. [2020-10-27 19:48:58,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:48:58,574 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 325 transitions. [2020-10-27 19:48:58,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 19:48:58,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:58,575 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:48:58,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 19:48:58,575 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:58,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:58,576 INFO L82 PathProgramCache]: Analyzing trace with hash -654198909, now seen corresponding path program 3 times [2020-10-27 19:48:58,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:58,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238064719] [2020-10-27 19:48:58,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:58,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:58,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:58,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:58,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:59,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:59,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:00,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:00,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:00,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:01,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:03,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:03,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 19:49:03,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 19:49:03,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 19:49:03,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:03,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:49:03,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:03,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 19:49:03,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:03,892 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2020-10-27 19:49:04,155 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-10-27 19:49:04,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:04,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:04,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:04,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:04,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:04,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:04,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:49:04,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:04,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:04,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:04,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:04,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:04,549 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:49:04,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238064719] [2020-10-27 19:49:04,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:04,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 19:49:04,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785939314] [2020-10-27 19:49:04,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 19:49:04,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:04,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 19:49:04,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:49:04,550 INFO L87 Difference]: Start difference. First operand 253 states and 325 transitions. Second operand 15 states. [2020-10-27 19:49:04,908 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2020-10-27 19:49:05,085 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-10-27 19:49:05,345 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2020-10-27 19:49:05,571 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-10-27 19:49:05,789 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-10-27 19:49:06,464 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-10-27 19:49:06,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:06,833 INFO L93 Difference]: Finished difference Result 391 states and 494 transitions. [2020-10-27 19:49:06,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 19:49:06,834 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 48 [2020-10-27 19:49:06,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:06,837 INFO L225 Difference]: With dead ends: 391 [2020-10-27 19:49:06,837 INFO L226 Difference]: Without dead ends: 372 [2020-10-27 19:49:06,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2020-10-27 19:49:06,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-10-27 19:49:06,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 335. [2020-10-27 19:49:06,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2020-10-27 19:49:06,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 425 transitions. [2020-10-27 19:49:06,928 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 425 transitions. Word has length 48 [2020-10-27 19:49:06,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:06,928 INFO L481 AbstractCegarLoop]: Abstraction has 335 states and 425 transitions. [2020-10-27 19:49:06,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 19:49:06,928 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 425 transitions. [2020-10-27 19:49:06,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 19:49:06,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:06,929 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:49:06,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 19:49:06,930 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:06,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:06,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1128466268, now seen corresponding path program 3 times [2020-10-27 19:49:06,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:06,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1146665785] [2020-10-27 19:49:06,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:06,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:06,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:07,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:07,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:07,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:08,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:10,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:10,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 19:49:10,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:49:10,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3469 [2020-10-27 19:49:10,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:10,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:49:10,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:10,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 19:49:10,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:10,783 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2020-10-27 19:49:11,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:11,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:11,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:11,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:11,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:11,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:11,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:49:11,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:11,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:11,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:11,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:11,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:11,223 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 19:49:11,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1146665785] [2020-10-27 19:49:11,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:11,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 19:49:11,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744356230] [2020-10-27 19:49:11,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 19:49:11,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:11,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 19:49:11,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:49:11,225 INFO L87 Difference]: Start difference. First operand 335 states and 425 transitions. Second operand 16 states. [2020-10-27 19:49:11,618 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-10-27 19:49:12,002 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 68 [2020-10-27 19:49:12,179 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-27 19:49:12,436 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 71 [2020-10-27 19:49:14,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:14,221 INFO L93 Difference]: Finished difference Result 458 states and 569 transitions. [2020-10-27 19:49:14,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 19:49:14,222 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 49 [2020-10-27 19:49:14,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:14,224 INFO L225 Difference]: With dead ends: 458 [2020-10-27 19:49:14,225 INFO L226 Difference]: Without dead ends: 454 [2020-10-27 19:49:14,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=275, Invalid=1365, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 19:49:14,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2020-10-27 19:49:14,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 343. [2020-10-27 19:49:14,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-10-27 19:49:14,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 435 transitions. [2020-10-27 19:49:14,307 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 435 transitions. Word has length 49 [2020-10-27 19:49:14,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:14,307 INFO L481 AbstractCegarLoop]: Abstraction has 343 states and 435 transitions. [2020-10-27 19:49:14,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 19:49:14,307 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 435 transitions. [2020-10-27 19:49:14,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 19:49:14,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:14,308 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:49:14,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 19:49:14,309 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:14,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:14,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1779346119, now seen corresponding path program 2 times [2020-10-27 19:49:14,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:14,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822754721] [2020-10-27 19:49:14,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:14,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:14,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:14,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:14,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:14,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:14,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:14,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:16,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:19,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:19,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 19:49:19,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 19:49:19,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 19:49:19,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:19,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 19:49:19,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:19,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 19:49:19,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:19,709 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2020-10-27 19:49:19,845 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 44 [2020-10-27 19:49:20,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:20,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:20,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:20,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:20,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:20,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:20,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:49:20,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:20,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:20,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:20,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:20,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:20,371 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:49:20,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822754721] [2020-10-27 19:49:20,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:20,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 19:49:20,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105066395] [2020-10-27 19:49:20,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 19:49:20,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:20,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 19:49:20,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:49:20,373 INFO L87 Difference]: Start difference. First operand 343 states and 435 transitions. Second operand 17 states. [2020-10-27 19:49:20,692 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2020-10-27 19:49:21,018 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-10-27 19:49:21,464 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 50 [2020-10-27 19:49:22,040 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 69 [2020-10-27 19:49:22,323 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 72 [2020-10-27 19:49:22,519 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2020-10-27 19:49:22,771 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 67 [2020-10-27 19:49:27,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:27,422 INFO L93 Difference]: Finished difference Result 766 states and 943 transitions. [2020-10-27 19:49:27,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-27 19:49:27,423 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 50 [2020-10-27 19:49:27,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:27,427 INFO L225 Difference]: With dead ends: 766 [2020-10-27 19:49:27,428 INFO L226 Difference]: Without dead ends: 762 [2020-10-27 19:49:27,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1895 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1078, Invalid=5564, Unknown=0, NotChecked=0, Total=6642 [2020-10-27 19:49:27,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2020-10-27 19:49:27,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 530. [2020-10-27 19:49:27,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 530 states. [2020-10-27 19:49:27,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 656 transitions. [2020-10-27 19:49:27,546 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 656 transitions. Word has length 50 [2020-10-27 19:49:27,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:27,546 INFO L481 AbstractCegarLoop]: Abstraction has 530 states and 656 transitions. [2020-10-27 19:49:27,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 19:49:27,547 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 656 transitions. [2020-10-27 19:49:27,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 19:49:27,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:27,548 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:49:27,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 19:49:27,549 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:27,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:27,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1515731668, now seen corresponding path program 1 times [2020-10-27 19:49:27,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:27,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234602518] [2020-10-27 19:49:27,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:27,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:27,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:27,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:27,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:28,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:28,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:29,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:29,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 19:49:29,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:49:29,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1881 [2020-10-27 19:49:29,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:29,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:49:29,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:49:29,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 19:49:29,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:29,859 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2020-10-27 19:49:30,147 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2020-10-27 19:49:30,392 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 65 [2020-10-27 19:49:30,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:30,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:30,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:30,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:30,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:30,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:30,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:49:30,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:30,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:30,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:30,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:30,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:30,820 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:49:30,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234602518] [2020-10-27 19:49:30,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:30,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 19:49:30,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064765719] [2020-10-27 19:49:30,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 19:49:30,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:30,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 19:49:30,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:49:30,822 INFO L87 Difference]: Start difference. First operand 530 states and 656 transitions. Second operand 15 states. [2020-10-27 19:49:31,465 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2020-10-27 19:49:31,809 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 82 [2020-10-27 19:49:31,992 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-27 19:49:33,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:33,413 INFO L93 Difference]: Finished difference Result 917 states and 1130 transitions. [2020-10-27 19:49:33,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 19:49:33,414 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2020-10-27 19:49:33,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:33,419 INFO L225 Difference]: With dead ends: 917 [2020-10-27 19:49:33,419 INFO L226 Difference]: Without dead ends: 913 [2020-10-27 19:49:33,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=178, Invalid=1012, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 19:49:33,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2020-10-27 19:49:33,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 557. [2020-10-27 19:49:33,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 557 states. [2020-10-27 19:49:33,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 690 transitions. [2020-10-27 19:49:33,531 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 690 transitions. Word has length 51 [2020-10-27 19:49:33,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:33,531 INFO L481 AbstractCegarLoop]: Abstraction has 557 states and 690 transitions. [2020-10-27 19:49:33,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 19:49:33,531 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 690 transitions. [2020-10-27 19:49:33,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 19:49:33,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:33,533 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:49:33,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 19:49:33,533 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:33,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:33,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1393032234, now seen corresponding path program 1 times [2020-10-27 19:49:33,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:33,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615086608] [2020-10-27 19:49:33,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:33,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:33,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:33,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:34,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:34,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 19:49:34,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:49:34,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 490 [2020-10-27 19:49:34,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:34,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:49:34,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:34,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 19:49:34,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:34,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:34,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:34,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:34,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:34,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:34,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:34,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 19:49:34,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:34,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:34,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:34,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:34,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:34,285 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:49:34,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615086608] [2020-10-27 19:49:34,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:34,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:49:34,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786945973] [2020-10-27 19:49:34,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:49:34,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:34,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:49:34,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:49:34,286 INFO L87 Difference]: Start difference. First operand 557 states and 690 transitions. Second operand 12 states. [2020-10-27 19:49:35,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:35,571 INFO L93 Difference]: Finished difference Result 707 states and 872 transitions. [2020-10-27 19:49:35,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 19:49:35,572 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-27 19:49:35,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:35,576 INFO L225 Difference]: With dead ends: 707 [2020-10-27 19:49:35,576 INFO L226 Difference]: Without dead ends: 703 [2020-10-27 19:49:35,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2020-10-27 19:49:35,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2020-10-27 19:49:35,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 516. [2020-10-27 19:49:35,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 516 states. [2020-10-27 19:49:35,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 639 transitions. [2020-10-27 19:49:35,690 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 639 transitions. Word has length 51 [2020-10-27 19:49:35,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:35,690 INFO L481 AbstractCegarLoop]: Abstraction has 516 states and 639 transitions. [2020-10-27 19:49:35,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:49:35,691 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 639 transitions. [2020-10-27 19:49:35,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 19:49:35,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:35,692 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:49:35,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 19:49:35,693 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:35,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:35,693 INFO L82 PathProgramCache]: Analyzing trace with hash 701854648, now seen corresponding path program 6 times [2020-10-27 19:49:35,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:35,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501784289] [2020-10-27 19:49:35,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:35,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:35,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:36,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:37,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:39,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:39,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 19:49:39,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:49:39,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3847 [2020-10-27 19:49:39,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:39,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 19:49:39,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:39,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 19:49:39,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:39,902 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-10-27 19:49:40,067 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2020-10-27 19:49:40,264 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-10-27 19:49:40,632 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 65 [2020-10-27 19:49:41,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:41,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:41,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:41,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:41,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:41,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:41,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:49:41,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:41,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:41,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:41,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:41,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:41,094 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:49:41,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501784289] [2020-10-27 19:49:41,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:41,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 19:49:41,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711483931] [2020-10-27 19:49:41,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 19:49:41,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:41,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 19:49:41,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2020-10-27 19:49:41,096 INFO L87 Difference]: Start difference. First operand 516 states and 639 transitions. Second operand 18 states. [2020-10-27 19:49:41,585 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 61 [2020-10-27 19:49:42,174 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 76 [2020-10-27 19:49:42,741 WARN L193 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 61 [2020-10-27 19:49:43,016 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 46 [2020-10-27 19:49:43,421 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 92 [2020-10-27 19:49:43,701 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2020-10-27 19:49:43,996 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-10-27 19:49:44,628 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-27 19:49:44,802 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-10-27 19:49:45,057 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-10-27 19:49:45,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:45,805 INFO L93 Difference]: Finished difference Result 932 states and 1158 transitions. [2020-10-27 19:49:45,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 19:49:45,806 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2020-10-27 19:49:45,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:45,810 INFO L225 Difference]: With dead ends: 932 [2020-10-27 19:49:45,810 INFO L226 Difference]: Without dead ends: 874 [2020-10-27 19:49:45,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=243, Invalid=1397, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 19:49:45,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2020-10-27 19:49:45,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 624. [2020-10-27 19:49:45,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 624 states. [2020-10-27 19:49:45,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 775 transitions. [2020-10-27 19:49:45,974 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 775 transitions. Word has length 51 [2020-10-27 19:49:45,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:45,974 INFO L481 AbstractCegarLoop]: Abstraction has 624 states and 775 transitions. [2020-10-27 19:49:45,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 19:49:45,974 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 775 transitions. [2020-10-27 19:49:45,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 19:49:45,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:45,977 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:49:45,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 19:49:45,977 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:45,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:45,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1138046916, now seen corresponding path program 4 times [2020-10-27 19:49:45,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:45,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145359656] [2020-10-27 19:49:45,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:46,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:46,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:46,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:47,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:47,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:47,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:48,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:48,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:48,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:49,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:51,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:51,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 19:49:51,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 19:49:51,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-27 19:49:51,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:51,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 19:49:51,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:51,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 19:49:51,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:51,573 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-10-27 19:49:51,753 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-10-27 19:49:52,099 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2020-10-27 19:49:52,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:52,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:52,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:52,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:52,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:52,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:52,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:49:52,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:52,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:52,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:52,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:52,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:52,608 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:49:52,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145359656] [2020-10-27 19:49:52,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:52,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 19:49:52,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354517994] [2020-10-27 19:49:52,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 19:49:52,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:52,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 19:49:52,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:49:52,609 INFO L87 Difference]: Start difference. First operand 624 states and 775 transitions. Second operand 17 states. [2020-10-27 19:49:53,105 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2020-10-27 19:49:53,360 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2020-10-27 19:49:53,650 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-27 19:49:53,962 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 72 [2020-10-27 19:49:54,408 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2020-10-27 19:49:54,771 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 77 [2020-10-27 19:49:55,156 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-10-27 19:49:56,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:56,364 INFO L93 Difference]: Finished difference Result 1048 states and 1305 transitions. [2020-10-27 19:49:56,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 19:49:56,365 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 51 [2020-10-27 19:49:56,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:56,370 INFO L225 Difference]: With dead ends: 1048 [2020-10-27 19:49:56,370 INFO L226 Difference]: Without dead ends: 990 [2020-10-27 19:49:56,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=190, Invalid=866, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 19:49:56,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2020-10-27 19:49:56,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 690. [2020-10-27 19:49:56,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 690 states. [2020-10-27 19:49:56,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 856 transitions. [2020-10-27 19:49:56,528 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 856 transitions. Word has length 51 [2020-10-27 19:49:56,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:56,528 INFO L481 AbstractCegarLoop]: Abstraction has 690 states and 856 transitions. [2020-10-27 19:49:56,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 19:49:56,528 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 856 transitions. [2020-10-27 19:49:56,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 19:49:56,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:56,530 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:49:56,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 19:49:56,531 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:56,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:56,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1402951033, now seen corresponding path program 4 times [2020-10-27 19:49:56,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:56,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395184097] [2020-10-27 19:49:56,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:56,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:56,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:57,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:57,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:58,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:58,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:01,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:01,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 19:50:01,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:50:01,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 19:50:01,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:01,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 19:50:01,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:50:01,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 19:50:01,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:02,142 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2020-10-27 19:50:02,325 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-10-27 19:50:02,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:50:02,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:02,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:02,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:02,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:50:02,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:02,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:50:02,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:02,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:50:02,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:50:02,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:50:02,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:02,883 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:50:02,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395184097] [2020-10-27 19:50:02,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:50:02,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 19:50:02,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538117978] [2020-10-27 19:50:02,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 19:50:02,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:50:02,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 19:50:02,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2020-10-27 19:50:02,886 INFO L87 Difference]: Start difference. First operand 690 states and 856 transitions. Second operand 19 states. [2020-10-27 19:50:03,291 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 53 [2020-10-27 19:50:03,508 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 42 [2020-10-27 19:50:03,690 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2020-10-27 19:50:04,046 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 64 [2020-10-27 19:50:04,269 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2020-10-27 19:50:04,577 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2020-10-27 19:50:04,770 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2020-10-27 19:50:05,094 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-10-27 19:50:05,637 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2020-10-27 19:50:05,884 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-10-27 19:50:08,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:50:08,534 INFO L93 Difference]: Finished difference Result 1412 states and 1730 transitions. [2020-10-27 19:50:08,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 19:50:08,535 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2020-10-27 19:50:08,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:50:08,541 INFO L225 Difference]: With dead ends: 1412 [2020-10-27 19:50:08,541 INFO L226 Difference]: Without dead ends: 1354 [2020-10-27 19:50:08,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=398, Invalid=2464, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 19:50:08,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-10-27 19:50:08,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 776. [2020-10-27 19:50:08,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-10-27 19:50:08,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 964 transitions. [2020-10-27 19:50:08,751 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 964 transitions. Word has length 52 [2020-10-27 19:50:08,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:50:08,752 INFO L481 AbstractCegarLoop]: Abstraction has 776 states and 964 transitions. [2020-10-27 19:50:08,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 19:50:08,752 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 964 transitions. [2020-10-27 19:50:08,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 19:50:08,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:50:08,755 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:50:08,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 19:50:08,755 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:50:08,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:50:08,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1052114699, now seen corresponding path program 4 times [2020-10-27 19:50:08,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:50:08,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1057206479] [2020-10-27 19:50:08,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:50:08,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:08,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:09,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:09,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:10,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:10,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:10,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:13,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:13,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 19:50:13,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 19:50:13,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 19:50:13,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:13,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 19:50:13,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:50:13,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 19:50:13,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:14,012 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2020-10-27 19:50:14,126 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2020-10-27 19:50:14,357 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-10-27 19:50:14,569 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-27 19:50:15,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:50:15,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:15,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:15,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:15,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:50:15,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:15,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:50:15,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:15,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:50:15,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:50:15,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:50:15,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:15,101 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:50:15,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1057206479] [2020-10-27 19:50:15,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:50:15,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 19:50:15,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056772016] [2020-10-27 19:50:15,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 19:50:15,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:50:15,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 19:50:15,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:50:15,103 INFO L87 Difference]: Start difference. First operand 776 states and 964 transitions. Second operand 17 states. [2020-10-27 19:50:15,791 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-10-27 19:50:16,037 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-10-27 19:50:17,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:50:17,832 INFO L93 Difference]: Finished difference Result 1291 states and 1580 transitions. [2020-10-27 19:50:17,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 19:50:17,832 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 52 [2020-10-27 19:50:17,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:50:17,838 INFO L225 Difference]: With dead ends: 1291 [2020-10-27 19:50:17,838 INFO L226 Difference]: Without dead ends: 1233 [2020-10-27 19:50:17,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2020-10-27 19:50:17,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2020-10-27 19:50:17,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 746. [2020-10-27 19:50:17,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 746 states. [2020-10-27 19:50:17,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 933 transitions. [2020-10-27 19:50:17,999 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 933 transitions. Word has length 52 [2020-10-27 19:50:17,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:50:17,999 INFO L481 AbstractCegarLoop]: Abstraction has 746 states and 933 transitions. [2020-10-27 19:50:18,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 19:50:18,000 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 933 transitions. [2020-10-27 19:50:18,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 19:50:18,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:50:18,001 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:50:18,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 19:50:18,002 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:50:18,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:50:18,002 INFO L82 PathProgramCache]: Analyzing trace with hash 2048010761, now seen corresponding path program 1 times [2020-10-27 19:50:18,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:50:18,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560880946] [2020-10-27 19:50:18,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:50:18,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:18,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:18,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:18,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:19,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:20,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:23,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:23,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 19:50:23,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:50:23,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-27 19:50:23,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:23,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 19:50:23,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:50:23,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 19:50:23,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:23,629 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-10-27 19:50:23,805 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-10-27 19:50:24,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:50:24,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:24,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:24,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:24,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:50:24,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:24,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:50:24,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:24,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:50:24,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:50:24,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:50:24,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:24,441 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:50:24,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560880946] [2020-10-27 19:50:24,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:50:24,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 19:50:24,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382114034] [2020-10-27 19:50:24,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 19:50:24,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:50:24,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 19:50:24,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-27 19:50:24,443 INFO L87 Difference]: Start difference. First operand 746 states and 933 transitions. Second operand 19 states. [2020-10-27 19:50:24,827 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 55 [2020-10-27 19:50:25,004 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 39 [2020-10-27 19:50:25,189 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 51 [2020-10-27 19:50:25,459 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 66 [2020-10-27 19:50:25,696 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-10-27 19:50:25,993 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2020-10-27 19:50:26,324 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2020-10-27 19:50:26,885 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2020-10-27 19:50:29,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:50:29,450 INFO L93 Difference]: Finished difference Result 1356 states and 1650 transitions. [2020-10-27 19:50:29,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 19:50:29,452 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2020-10-27 19:50:29,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:50:29,456 INFO L225 Difference]: With dead ends: 1356 [2020-10-27 19:50:29,456 INFO L226 Difference]: Without dead ends: 1298 [2020-10-27 19:50:29,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=356, Invalid=2194, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 19:50:29,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2020-10-27 19:50:29,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 738. [2020-10-27 19:50:29,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 738 states. [2020-10-27 19:50:29,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 921 transitions. [2020-10-27 19:50:29,607 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 921 transitions. Word has length 52 [2020-10-27 19:50:29,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:50:29,607 INFO L481 AbstractCegarLoop]: Abstraction has 738 states and 921 transitions. [2020-10-27 19:50:29,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 19:50:29,607 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 921 transitions. [2020-10-27 19:50:29,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 19:50:29,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:50:29,608 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:50:29,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 19:50:29,608 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:50:29,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:50:29,609 INFO L82 PathProgramCache]: Analyzing trace with hash -2049600777, now seen corresponding path program 5 times [2020-10-27 19:50:29,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:50:29,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450303929] [2020-10-27 19:50:29,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:50:29,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:29,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:29,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:30,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:30,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:31,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:31,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:32,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:33,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:34,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:34,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:34,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 19:50:34,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 19:50:34,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 19:50:34,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:34,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 19:50:34,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:50:34,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 19:50:34,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:35,079 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2020-10-27 19:50:35,267 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2020-10-27 19:50:35,572 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2020-10-27 19:50:36,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:50:36,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:50:36,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:50:36,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:50:36,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:50:36,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:50:36,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:50:36,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:50:36,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:50:36,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:50:36,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:50:36,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:50:36,328 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:50:36,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450303929] [2020-10-27 19:50:36,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:50:36,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 19:50:36,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162388619] [2020-10-27 19:50:36,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 19:50:36,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:50:36,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 19:50:36,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2020-10-27 19:50:36,330 INFO L87 Difference]: Start difference. First operand 738 states and 921 transitions. Second operand 21 states. [2020-10-27 19:50:37,238 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2020-10-27 19:50:37,425 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-10-27 19:50:37,586 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54