/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/eca-rers2012/Problem04_label25.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 15:56:54,404 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 15:56:54,409 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 15:56:54,468 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 15:56:54,469 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 15:56:54,476 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 15:56:54,479 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 15:56:54,485 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 15:56:54,489 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 15:56:54,495 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 15:56:54,497 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 15:56:54,498 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 15:56:54,499 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 15:56:54,502 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 15:56:54,506 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 15:56:54,508 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 15:56:54,509 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 15:56:54,513 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 15:56:54,520 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 15:56:54,528 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 15:56:54,530 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 15:56:54,532 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 15:56:54,534 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 15:56:54,536 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 15:56:54,545 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 15:56:54,545 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 15:56:54,546 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 15:56:54,548 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 15:56:54,548 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 15:56:54,549 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 15:56:54,550 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 15:56:54,551 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 15:56:54,553 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 15:56:54,554 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 15:56:54,555 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 15:56:54,555 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 15:56:54,556 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 15:56:54,556 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 15:56:54,556 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 15:56:54,557 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 15:56:54,558 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 15:56:54,566 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 15:56:54,621 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 15:56:54,621 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 15:56:54,625 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 15:56:54,626 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 15:56:54,626 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 15:56:54,626 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 15:56:54,626 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 15:56:54,627 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 15:56:54,627 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 15:56:54,627 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 15:56:54,628 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 15:56:54,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 15:56:54,629 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 15:56:54,629 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 15:56:54,629 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 15:56:54,629 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 15:56:54,629 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 15:56:54,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 15:56:54,630 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 15:56:54,630 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 15:56:54,630 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 15:56:54,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 15:56:54,631 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 15:56:54,631 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 15:56:54,631 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 15:56:54,631 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 15:56:54,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 15:56:54,632 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 15:56:54,632 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 15:56:54,632 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 15:56:55,038 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 15:56:55,067 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 15:56:55,070 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 15:56:55,072 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 15:56:55,072 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 15:56:55,074 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label25.c [2020-10-27 15:56:55,156 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e5f7881e7/90b48aa62b1f494a8efab7591ece672f/FLAG87cd8914a [2020-10-27 15:56:56,280 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 15:56:56,281 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem04_label25.c [2020-10-27 15:56:56,330 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e5f7881e7/90b48aa62b1f494a8efab7591ece672f/FLAG87cd8914a [2020-10-27 15:56:56,638 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e5f7881e7/90b48aa62b1f494a8efab7591ece672f [2020-10-27 15:56:56,641 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 15:56:56,649 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 15:56:56,654 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 15:56:56,655 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 15:56:56,659 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 15:56:56,661 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 03:56:56" (1/1) ... [2020-10-27 15:56:56,666 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ef1984b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:56:56, skipping insertion in model container [2020-10-27 15:56:56,666 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 03:56:56" (1/1) ... [2020-10-27 15:56:56,676 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 15:56:56,879 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 15:56:58,215 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 15:56:58,233 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 15:56:58,874 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 15:56:58,906 INFO L208 MainTranslator]: Completed translation [2020-10-27 15:56:58,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:56:58 WrapperNode [2020-10-27 15:56:58,907 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 15:56:58,908 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 15:56:58,908 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 15:56:58,908 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 15:56:58,922 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:56:58" (1/1) ... [2020-10-27 15:56:58,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:56:58" (1/1) ... [2020-10-27 15:56:58,982 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:56:58" (1/1) ... [2020-10-27 15:56:58,982 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:56:58" (1/1) ... [2020-10-27 15:56:59,128 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:56:58" (1/1) ... [2020-10-27 15:56:59,160 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:56:58" (1/1) ... [2020-10-27 15:56:59,180 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:56:58" (1/1) ... [2020-10-27 15:56:59,244 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 15:56:59,247 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 15:56:59,247 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 15:56:59,247 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 15:56:59,248 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:56:58" (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 15:56:59,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 15:56:59,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 15:56:59,351 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 15:56:59,352 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 15:56:59,352 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 15:56:59,353 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 15:56:59,353 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 15:56:59,353 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 15:56:59,354 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 15:56:59,354 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 15:56:59,355 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 15:56:59,355 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 15:56:59,355 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 15:56:59,355 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 15:56:59,355 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 15:56:59,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 15:56:59,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 15:56:59,357 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 15:56:59,357 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 15:56:59,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 15:56:59,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 15:56:59,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 15:56:59,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 15:56:59,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 15:56:59,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 15:57:04,310 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 15:57:04,311 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 15:57:04,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 03:57:04 BoogieIcfgContainer [2020-10-27 15:57:04,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 15:57:04,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 15:57:04,317 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 15:57:04,320 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 15:57:04,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 03:56:56" (1/3) ... [2020-10-27 15:57:04,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23835b60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 03:57:04, skipping insertion in model container [2020-10-27 15:57:04,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:56:58" (2/3) ... [2020-10-27 15:57:04,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23835b60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 03:57:04, skipping insertion in model container [2020-10-27 15:57:04,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 03:57:04" (3/3) ... [2020-10-27 15:57:04,324 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem04_label25.c [2020-10-27 15:57:04,336 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 15:57:04,343 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 15:57:04,357 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 15:57:04,394 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 15:57:04,394 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 15:57:04,394 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 15:57:04,394 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 15:57:04,394 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 15:57:04,394 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 15:57:04,395 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 15:57:04,395 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 15:57:04,430 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states. [2020-10-27 15:57:04,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 811 [2020-10-27 15:57:04,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:57:04,551 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:57:04,552 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:57:04,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:57:04,566 INFO L82 PathProgramCache]: Analyzing trace with hash -66937220, now seen corresponding path program 1 times [2020-10-27 15:57:04,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:57:04,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537461962] [2020-10-27 15:57:04,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:57:05,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:57:05,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:57:10,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:57:10,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:57:10,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 826 [2020-10-27 15:57:10,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 15:57:10,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5266 [2020-10-27 15:57:10,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:57:10,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 15:57:10,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 15:57:10,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 817 [2020-10-27 15:57:10,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 15:57:11,733 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 15:57:11,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:57:11,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:57:11,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:57:11,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:57:11,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:57:11,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:57:11,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 15:57:11,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:57:11,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:57:11,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:57:11,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 15:57:11,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:57:12,677 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 15:57:12,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537461962] [2020-10-27 15:57:12,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 15:57:12,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 15:57:12,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540194680] [2020-10-27 15:57:12,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 15:57:12,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:57:12,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 15:57:12,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 15:57:12,705 INFO L87 Difference]: Start difference. First operand 910 states. Second operand 4 states. [2020-10-27 15:57:12,877 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-27 15:57:23,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:57:23,908 INFO L93 Difference]: Finished difference Result 2677 states and 5143 transitions. [2020-10-27 15:57:23,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 15:57:23,910 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 810 [2020-10-27 15:57:23,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:57:23,952 INFO L225 Difference]: With dead ends: 2677 [2020-10-27 15:57:23,952 INFO L226 Difference]: Without dead ends: 1703 [2020-10-27 15:57:23,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 15:57:23,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2020-10-27 15:57:24,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1690. [2020-10-27 15:57:24,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1690 states. [2020-10-27 15:57:24,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 3030 transitions. [2020-10-27 15:57:24,142 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 3030 transitions. Word has length 810 [2020-10-27 15:57:24,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:57:24,144 INFO L481 AbstractCegarLoop]: Abstraction has 1690 states and 3030 transitions. [2020-10-27 15:57:24,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 15:57:24,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 3030 transitions. [2020-10-27 15:57:24,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 819 [2020-10-27 15:57:24,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:57:24,173 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:57:24,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 15:57:24,174 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:57:24,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:57:24,175 INFO L82 PathProgramCache]: Analyzing trace with hash -463364130, now seen corresponding path program 1 times [2020-10-27 15:57:24,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:57:24,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739860286] [2020-10-27 15:57:24,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:57:24,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:57:24,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:57:25,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:57:27,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:57:29,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:57:29,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 836 [2020-10-27 15:57:29,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 15:57:29,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 15:57:29,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:57:29,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 15:57:29,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 15:57:29,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 814 [2020-10-27 15:57:29,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:57:29,992 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 15:57:29,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:57:29,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:57:30,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:57:30,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:57:30,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:57:30,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:57:30,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 15:57:30,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:57:30,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:57:30,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:57:30,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:57:30,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 15:57:30,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 15:57:30,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:57:30,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:57:30,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:57:30,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 15:57:30,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:57:30,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 15:57:30,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:57:30,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:57:30,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:57:30,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 15:57:30,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:57:30,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:57:30,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739860286] [2020-10-27 15:57:30,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:57:30,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 15:57:30,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749216646] [2020-10-27 15:57:30,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 15:57:30,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:57:30,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 15:57:30,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 15:57:30,823 INFO L87 Difference]: Start difference. First operand 1690 states and 3030 transitions. Second operand 6 states. [2020-10-27 15:57:31,057 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-27 15:57:43,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:57:43,813 INFO L93 Difference]: Finished difference Result 5077 states and 9156 transitions. [2020-10-27 15:57:43,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 15:57:43,824 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 818 [2020-10-27 15:57:43,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:57:43,847 INFO L225 Difference]: With dead ends: 5077 [2020-10-27 15:57:43,847 INFO L226 Difference]: Without dead ends: 3393 [2020-10-27 15:57:43,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 15:57:43,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3393 states. [2020-10-27 15:57:43,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3393 to 3389. [2020-10-27 15:57:43,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3389 states. [2020-10-27 15:57:43,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3389 states to 3389 states and 5302 transitions. [2020-10-27 15:57:43,965 INFO L78 Accepts]: Start accepts. Automaton has 3389 states and 5302 transitions. Word has length 818 [2020-10-27 15:57:43,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:57:43,967 INFO L481 AbstractCegarLoop]: Abstraction has 3389 states and 5302 transitions. [2020-10-27 15:57:43,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 15:57:43,968 INFO L276 IsEmpty]: Start isEmpty. Operand 3389 states and 5302 transitions. [2020-10-27 15:57:44,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 826 [2020-10-27 15:57:44,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:57:44,003 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:57:44,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 15:57:44,004 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:57:44,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:57:44,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1626773323, now seen corresponding path program 1 times [2020-10-27 15:57:44,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:57:44,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48721284] [2020-10-27 15:57:44,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:57:44,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:57:44,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:57:44,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:57:47,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:57:49,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:57:49,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 843 [2020-10-27 15:57:49,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 15:57:49,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5097 [2020-10-27 15:57:49,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:57:49,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 15:57:49,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 15:57:49,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 814 [2020-10-27 15:57:49,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:57:49,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:57:49,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:57:49,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:57:49,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:57:49,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:57:49,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:57:49,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 15:57:49,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:57:49,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:57:49,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:57:49,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:57:49,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:57:49,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 15:57:49,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:57:49,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:57:49,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:57:49,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 15:57:49,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:57:49,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 15:57:49,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:57:49,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:57:49,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:57:49,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 15:57:49,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:57:50,605 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:57:50,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48721284] [2020-10-27 15:57:50,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:57:50,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 15:57:50,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660769901] [2020-10-27 15:57:50,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 15:57:50,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:57:50,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 15:57:50,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 15:57:50,609 INFO L87 Difference]: Start difference. First operand 3389 states and 5302 transitions. Second operand 5 states. [2020-10-27 15:58:03,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:58:03,140 INFO L93 Difference]: Finished difference Result 10153 states and 16069 transitions. [2020-10-27 15:58:03,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 15:58:03,141 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 825 [2020-10-27 15:58:03,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:58:03,183 INFO L225 Difference]: With dead ends: 10153 [2020-10-27 15:58:03,183 INFO L226 Difference]: Without dead ends: 6770 [2020-10-27 15:58:03,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 15:58:03,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6770 states. [2020-10-27 15:58:03,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6770 to 6766. [2020-10-27 15:58:03,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6766 states. [2020-10-27 15:58:03,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6766 states to 6766 states and 9488 transitions. [2020-10-27 15:58:03,424 INFO L78 Accepts]: Start accepts. Automaton has 6766 states and 9488 transitions. Word has length 825 [2020-10-27 15:58:03,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:58:03,427 INFO L481 AbstractCegarLoop]: Abstraction has 6766 states and 9488 transitions. [2020-10-27 15:58:03,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 15:58:03,428 INFO L276 IsEmpty]: Start isEmpty. Operand 6766 states and 9488 transitions. [2020-10-27 15:58:03,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 831 [2020-10-27 15:58:03,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:58:03,464 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:58:03,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 15:58:03,465 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:58:03,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:58:03,466 INFO L82 PathProgramCache]: Analyzing trace with hash -2066276602, now seen corresponding path program 1 times [2020-10-27 15:58:03,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:58:03,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611603179] [2020-10-27 15:58:03,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:58:03,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:58:03,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:58:04,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:58:08,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:58:08,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:58:08,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 848 [2020-10-27 15:58:08,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 15:58:08,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5104 [2020-10-27 15:58:08,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:58:08,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 15:58:08,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 15:58:08,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 797 [2020-10-27 15:58:08,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:58:10,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:58:10,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:58:10,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:58:10,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:58:10,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:58:10,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:58:10,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 15:58:10,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:58:10,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:58:10,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:58:10,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:58:10,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:58:10,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 15:58:10,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:58:10,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:58:10,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:58:10,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 15:58:10,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:58:10,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 15:58:10,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:58:10,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:58:10,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:58:10,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 15:58:10,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:58:16,345 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:58:16,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611603179] [2020-10-27 15:58:16,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:58:16,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 15:58:16,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372040246] [2020-10-27 15:58:16,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 15:58:16,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:58:16,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 15:58:16,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 15:58:16,348 INFO L87 Difference]: Start difference. First operand 6766 states and 9488 transitions. Second operand 5 states. [2020-10-27 15:58:16,778 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-27 15:58:29,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:58:29,175 INFO L93 Difference]: Finished difference Result 14318 states and 20565 transitions. [2020-10-27 15:58:29,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 15:58:29,181 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 830 [2020-10-27 15:58:29,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:58:29,214 INFO L225 Difference]: With dead ends: 14318 [2020-10-27 15:58:29,214 INFO L226 Difference]: Without dead ends: 6770 [2020-10-27 15:58:29,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 15:58:29,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6770 states. [2020-10-27 15:58:29,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6770 to 6766. [2020-10-27 15:58:29,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6766 states. [2020-10-27 15:58:29,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6766 states to 6766 states and 9486 transitions. [2020-10-27 15:58:29,395 INFO L78 Accepts]: Start accepts. Automaton has 6766 states and 9486 transitions. Word has length 830 [2020-10-27 15:58:29,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:58:29,396 INFO L481 AbstractCegarLoop]: Abstraction has 6766 states and 9486 transitions. [2020-10-27 15:58:29,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 15:58:29,396 INFO L276 IsEmpty]: Start isEmpty. Operand 6766 states and 9486 transitions. [2020-10-27 15:58:29,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 832 [2020-10-27 15:58:29,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:58:29,418 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:58:29,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 15:58:29,419 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:58:29,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:58:29,419 INFO L82 PathProgramCache]: Analyzing trace with hash -362503031, now seen corresponding path program 1 times [2020-10-27 15:58:29,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:58:29,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077441579] [2020-10-27 15:58:29,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:58:29,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:58:29,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:58:30,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:58:32,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:58:34,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:58:34,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 849 [2020-10-27 15:58:34,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 15:58:34,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-27 15:58:34,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:58:34,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 15:58:34,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 15:58:34,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 814 [2020-10-27 15:58:34,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:58:35,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:58:35,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:58:35,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:58:35,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:58:35,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:58:35,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:58:35,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 15:58:35,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:58:35,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:58:35,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:58:35,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:58:35,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:58:35,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 15:58:35,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:58:35,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:58:35,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:58:35,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 15:58:35,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:58:35,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 15:58:35,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:58:35,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:58:35,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:58:35,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 15:58:35,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:58:35,740 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:58:35,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077441579] [2020-10-27 15:58:35,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:58:35,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 15:58:35,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323550611] [2020-10-27 15:58:35,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 15:58:35,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:58:35,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 15:58:35,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 15:58:35,744 INFO L87 Difference]: Start difference. First operand 6766 states and 9486 transitions. Second operand 5 states. [2020-10-27 15:58:35,874 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-27 15:58:46,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:58:46,550 INFO L93 Difference]: Finished difference Result 20312 states and 29035 transitions. [2020-10-27 15:58:46,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 15:58:46,552 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 831 [2020-10-27 15:58:46,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:58:46,624 INFO L225 Difference]: With dead ends: 20312 [2020-10-27 15:58:46,624 INFO L226 Difference]: Without dead ends: 13552 [2020-10-27 15:58:46,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 15:58:46,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13552 states. [2020-10-27 15:58:46,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13552 to 13540. [2020-10-27 15:58:46,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13540 states. [2020-10-27 15:58:46,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13540 states to 13540 states and 18619 transitions. [2020-10-27 15:58:46,999 INFO L78 Accepts]: Start accepts. Automaton has 13540 states and 18619 transitions. Word has length 831 [2020-10-27 15:58:47,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:58:47,000 INFO L481 AbstractCegarLoop]: Abstraction has 13540 states and 18619 transitions. [2020-10-27 15:58:47,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 15:58:47,001 INFO L276 IsEmpty]: Start isEmpty. Operand 13540 states and 18619 transitions. [2020-10-27 15:58:47,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 861 [2020-10-27 15:58:47,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:58:47,043 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:58:47,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 15:58:47,043 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:58:47,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:58:47,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1530298134, now seen corresponding path program 1 times [2020-10-27 15:58:47,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:58:47,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944173534] [2020-10-27 15:58:47,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:58:47,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:58:47,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:58:47,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:58:52,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:58:52,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 878 [2020-10-27 15:58:52,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 15:58:52,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5071 [2020-10-27 15:58:52,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:58:52,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 15:58:52,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-27 15:58:52,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 555 [2020-10-27 15:58:52,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:58:53,794 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 15:58:53,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:58:53,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:58:53,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:58:53,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:58:53,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:58:53,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:58:53,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 15:58:53,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:58:53,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:58:53,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:58:53,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:58:53,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:58:53,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 15:58:53,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:58:53,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:58:53,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:58:53,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 15:58:53,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:58:53,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-27 15:58:53,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:58:53,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:58:53,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:58:53,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 15:58:53,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:58:58,780 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:58:58,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1944173534] [2020-10-27 15:58:58,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:58:58,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 15:58:58,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927383833] [2020-10-27 15:58:58,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 15:58:58,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:58:58,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 15:58:58,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-10-27 15:58:58,784 INFO L87 Difference]: Start difference. First operand 13540 states and 18619 transitions. Second operand 17 states. [2020-10-27 15:58:59,809 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 15:59:00,050 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-27 15:59:01,393 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-27 15:59:02,289 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 15:59:07,110 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 15:59:07,348 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-27 15:59:10,556 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 120 [2020-10-27 15:59:14,848 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 113 [2020-10-27 15:59:15,269 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 118 [2020-10-27 15:59:16,866 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 117 [2020-10-27 15:59:18,109 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 115 [2020-10-27 15:59:22,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:59:22,719 INFO L93 Difference]: Finished difference Result 27626 states and 38409 transitions. [2020-10-27 15:59:22,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 15:59:22,721 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 860 [2020-10-27 15:59:22,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:59:22,767 INFO L225 Difference]: With dead ends: 27626 [2020-10-27 15:59:22,767 INFO L226 Difference]: Without dead ends: 14092 [2020-10-27 15:59:22,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2020-10-27 15:59:22,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14092 states. [2020-10-27 15:59:23,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14092 to 14088. [2020-10-27 15:59:23,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14088 states. [2020-10-27 15:59:23,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14088 states to 14088 states and 19184 transitions. [2020-10-27 15:59:23,123 INFO L78 Accepts]: Start accepts. Automaton has 14088 states and 19184 transitions. Word has length 860 [2020-10-27 15:59:23,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:59:23,124 INFO L481 AbstractCegarLoop]: Abstraction has 14088 states and 19184 transitions. [2020-10-27 15:59:23,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 15:59:23,125 INFO L276 IsEmpty]: Start isEmpty. Operand 14088 states and 19184 transitions. [2020-10-27 15:59:23,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 869 [2020-10-27 15:59:23,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:59:23,163 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:59:23,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 15:59:23,163 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:59:23,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:59:23,164 INFO L82 PathProgramCache]: Analyzing trace with hash 474087514, now seen corresponding path program 1 times [2020-10-27 15:59:23,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:59:23,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566465687] [2020-10-27 15:59:23,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:59:23,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:59:23,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:59:24,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:59:26,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:59:28,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:59:28,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 886 [2020-10-27 15:59:28,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 15:59:28,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5086 [2020-10-27 15:59:28,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:59:28,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 15:59:28,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 68 [2020-10-27 15:59:28,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 814 [2020-10-27 15:59:28,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:59:28,780 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 15:59:28,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:59:28,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:59:28,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:59:28,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:59:28,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:59:28,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:59:28,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 15:59:28,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:59:28,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:59:28,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:59:28,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:59:28,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:59:28,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 15:59:28,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:59:28,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:59:28,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:59:28,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 15:59:28,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:59:28,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-27 15:59:28,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:59:28,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:59:28,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:59:28,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 15:59:28,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:59:29,750 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:59:29,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566465687] [2020-10-27 15:59:29,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:59:29,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 15:59:29,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30040843] [2020-10-27 15:59:29,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 15:59:29,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:59:29,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 15:59:29,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 15:59:29,756 INFO L87 Difference]: Start difference. First operand 14088 states and 19184 transitions. Second operand 6 states. [2020-10-27 15:59:46,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:59:46,750 INFO L93 Difference]: Finished difference Result 34918 states and 49143 transitions. [2020-10-27 15:59:46,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 15:59:46,751 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 868 [2020-10-27 15:59:46,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:59:46,826 INFO L225 Difference]: With dead ends: 34918 [2020-10-27 15:59:46,827 INFO L226 Difference]: Without dead ends: 20836 [2020-10-27 15:59:46,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 15:59:46,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20836 states. [2020-10-27 15:59:47,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20836 to 20832. [2020-10-27 15:59:47,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20832 states. [2020-10-27 15:59:47,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20832 states to 20832 states and 27663 transitions. [2020-10-27 15:59:47,348 INFO L78 Accepts]: Start accepts. Automaton has 20832 states and 27663 transitions. Word has length 868 [2020-10-27 15:59:47,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:59:47,350 INFO L481 AbstractCegarLoop]: Abstraction has 20832 states and 27663 transitions. [2020-10-27 15:59:47,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 15:59:47,350 INFO L276 IsEmpty]: Start isEmpty. Operand 20832 states and 27663 transitions. [2020-10-27 15:59:47,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 889 [2020-10-27 15:59:47,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:59:47,403 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:59:47,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 15:59:47,404 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:59:47,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:59:47,405 INFO L82 PathProgramCache]: Analyzing trace with hash -711065116, now seen corresponding path program 1 times [2020-10-27 15:59:47,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:59:47,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048640870] [2020-10-27 15:59:47,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:59:47,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:59:47,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:59:47,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:59:51,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:59:51,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:59:52,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:59:52,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 908 [2020-10-27 15:59:52,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 15:59:52,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-27 15:59:52,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:59:52,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 15:59:52,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 90 [2020-10-27 15:59:52,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 814 [2020-10-27 15:59:52,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:59:52,987 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 15:59:52,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:59:52,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:59:52,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:59:52,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:59:53,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:59:53,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:59:53,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 15:59:53,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:59:53,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:59:53,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:59:53,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:59:53,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:59:53,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 15:59:53,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:59:53,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:59:53,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:59:53,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-27 15:59:53,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:59:53,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 15:59:53,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:59:53,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:59:53,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:59:53,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:59:53,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:59:53,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-27 15:59:53,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:59:53,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:59:53,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:59:53,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 15:59:53,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:59:53,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-27 15:59:53,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:59:53,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:59:53,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:59:53,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 15:59:53,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:59:53,812 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 73 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 15:59:53,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048640870] [2020-10-27 15:59:53,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:59:53,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 15:59:53,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59257781] [2020-10-27 15:59:53,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 15:59:53,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:59:53,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 15:59:53,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 15:59:53,815 INFO L87 Difference]: Start difference. First operand 20832 states and 27663 transitions. Second operand 5 states. [2020-10-27 15:59:53,956 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-27 16:00:07,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:00:07,319 INFO L93 Difference]: Finished difference Result 50921 states and 70032 transitions. [2020-10-27 16:00:07,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 16:00:07,320 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 888 [2020-10-27 16:00:07,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:00:07,425 INFO L225 Difference]: With dead ends: 50921 [2020-10-27 16:00:07,425 INFO L226 Difference]: Without dead ends: 30095 [2020-10-27 16:00:07,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 16:00:07,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30095 states. [2020-10-27 16:00:08,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30095 to 30091. [2020-10-27 16:00:08,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30091 states. [2020-10-27 16:00:08,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30091 states to 30091 states and 39317 transitions. [2020-10-27 16:00:08,150 INFO L78 Accepts]: Start accepts. Automaton has 30091 states and 39317 transitions. Word has length 888 [2020-10-27 16:00:08,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:00:08,150 INFO L481 AbstractCegarLoop]: Abstraction has 30091 states and 39317 transitions. [2020-10-27 16:00:08,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 16:00:08,151 INFO L276 IsEmpty]: Start isEmpty. Operand 30091 states and 39317 transitions. [2020-10-27 16:00:08,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1437 [2020-10-27 16:00:08,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:00:08,226 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:00:08,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 16:00:08,226 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:00:08,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:00:08,227 INFO L82 PathProgramCache]: Analyzing trace with hash 967149416, now seen corresponding path program 1 times [2020-10-27 16:00:08,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:00:08,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979403096] [2020-10-27 16:00:08,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:00:08,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:00:08,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:00:09,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:00:09,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:00:13,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:00:13,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1458 [2020-10-27 16:00:13,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 16:00:13,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5090 [2020-10-27 16:00:13,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:00:13,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 16:00:13,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 634 [2020-10-27 16:00:13,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 820 [2020-10-27 16:00:13,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:00:14,208 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 16:00:14,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:00:14,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:00:14,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:00:14,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:00:14,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:00:14,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:00:14,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 16:00:14,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:00:14,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:00:14,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:00:14,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:00:14,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:00:14,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:00:14,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:00:14,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:00:14,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:00:14,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 631 [2020-10-27 16:00:14,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:00:14,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 373 [2020-10-27 16:00:14,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:00:14,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:00:14,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:00:14,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 619 [2020-10-27 16:00:14,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:00:14,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2020-10-27 16:00:14,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:00:14,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:00:15,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:00:15,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 404 [2020-10-27 16:00:15,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:00:15,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 262 [2020-10-27 16:00:15,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:00:15,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:00:15,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:00:15,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 395 [2020-10-27 16:00:15,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:00:15,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2020-10-27 16:00:15,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:00:15,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:00:15,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:00:15,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-27 16:00:15,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:00:15,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-27 16:00:15,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:00:15,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:00:15,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:00:15,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 171 [2020-10-27 16:00:15,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:00:16,995 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 614 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:00:16,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979403096] [2020-10-27 16:00:16,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:00:16,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 16:00:16,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091185438] [2020-10-27 16:00:16,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 16:00:16,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:00:16,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 16:00:16,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 16:00:16,998 INFO L87 Difference]: Start difference. First operand 30091 states and 39317 transitions. Second operand 5 states. [2020-10-27 16:00:17,507 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-27 16:00:32,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:00:32,599 INFO L93 Difference]: Finished difference Result 87167 states and 114720 transitions. [2020-10-27 16:00:32,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 16:00:32,600 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1436 [2020-10-27 16:00:32,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:00:32,826 INFO L225 Difference]: With dead ends: 87167 [2020-10-27 16:00:32,826 INFO L226 Difference]: Without dead ends: 57082 [2020-10-27 16:00:32,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 16:00:32,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57082 states. [2020-10-27 16:00:34,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57082 to 57071. [2020-10-27 16:00:34,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57071 states. [2020-10-27 16:00:34,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57071 states to 57071 states and 71100 transitions. [2020-10-27 16:00:34,445 INFO L78 Accepts]: Start accepts. Automaton has 57071 states and 71100 transitions. Word has length 1436 [2020-10-27 16:00:34,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:00:34,447 INFO L481 AbstractCegarLoop]: Abstraction has 57071 states and 71100 transitions. [2020-10-27 16:00:34,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 16:00:34,447 INFO L276 IsEmpty]: Start isEmpty. Operand 57071 states and 71100 transitions. [2020-10-27 16:00:34,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1489 [2020-10-27 16:00:34,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:00:34,590 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:00:34,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 16:00:34,591 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:00:34,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:00:34,592 INFO L82 PathProgramCache]: Analyzing trace with hash 343123262, now seen corresponding path program 1 times [2020-10-27 16:00:34,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:00:34,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615722781] [2020-10-27 16:00:34,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:00:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:00:35,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:00:35,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:00:35,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking...