/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_label34.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 15:59:54,660 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 15:59:54,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 15:59:54,722 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 15:59:54,723 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 15:59:54,729 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 15:59:54,731 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 15:59:54,736 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 15:59:54,739 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 15:59:54,745 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 15:59:54,747 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 15:59:54,748 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 15:59:54,749 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 15:59:54,752 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 15:59:54,755 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 15:59:54,757 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 15:59:54,759 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 15:59:54,762 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 15:59:54,768 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 15:59:54,776 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 15:59:54,778 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 15:59:54,779 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 15:59:54,781 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 15:59:54,783 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 15:59:54,791 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 15:59:54,791 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 15:59:54,792 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 15:59:54,794 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 15:59:54,794 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 15:59:54,795 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 15:59:54,796 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 15:59:54,796 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 15:59:54,798 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 15:59:54,799 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 15:59:54,800 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 15:59:54,800 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 15:59:54,801 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 15:59:54,801 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 15:59:54,801 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 15:59:54,802 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 15:59:54,803 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 15:59:54,810 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 15:59:54,856 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 15:59:54,857 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 15:59:54,861 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 15:59:54,862 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 15:59:54,862 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 15:59:54,862 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 15:59:54,862 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 15:59:54,863 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 15:59:54,863 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 15:59:54,863 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 15:59:54,864 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 15:59:54,864 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 15:59:54,864 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 15:59:54,864 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 15:59:54,865 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 15:59:54,865 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 15:59:54,865 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 15:59:54,865 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 15:59:54,865 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 15:59:54,876 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 15:59:54,877 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 15:59:54,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 15:59:54,877 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 15:59:54,877 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 15:59:54,877 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 15:59:54,878 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 15:59:54,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 15:59:54,878 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 15:59:54,878 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 15:59:54,878 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 15:59:55,294 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 15:59:55,320 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 15:59:55,324 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 15:59:55,326 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 15:59:55,327 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 15:59:55,328 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label34.c [2020-10-27 15:59:55,423 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/46d7e419d/40bbb8bc21474127b252f9e826bd8274/FLAGf54d229f7 [2020-10-27 15:59:56,535 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 15:59:56,536 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem04_label34.c [2020-10-27 15:59:56,578 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/46d7e419d/40bbb8bc21474127b252f9e826bd8274/FLAGf54d229f7 [2020-10-27 15:59:56,923 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/46d7e419d/40bbb8bc21474127b252f9e826bd8274 [2020-10-27 15:59:56,927 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 15:59:56,935 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 15:59:56,939 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 15:59:56,940 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 15:59:56,944 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 15:59:56,945 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 03:59:56" (1/1) ... [2020-10-27 15:59:56,950 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58ade471 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:59:56, skipping insertion in model container [2020-10-27 15:59:56,950 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 03:59:56" (1/1) ... [2020-10-27 15:59:56,960 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 15:59:57,123 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 15:59:58,582 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 15:59:58,603 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 15:59:59,362 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 15:59:59,436 INFO L208 MainTranslator]: Completed translation [2020-10-27 15:59:59,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:59:59 WrapperNode [2020-10-27 15:59:59,438 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 15:59:59,439 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 15:59:59,439 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 15:59:59,439 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 15:59:59,455 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:59:59" (1/1) ... [2020-10-27 15:59:59,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:59:59" (1/1) ... [2020-10-27 15:59:59,548 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:59:59" (1/1) ... [2020-10-27 15:59:59,549 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:59:59" (1/1) ... [2020-10-27 15:59:59,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:59:59" (1/1) ... [2020-10-27 15:59:59,721 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:59:59" (1/1) ... [2020-10-27 15:59:59,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:59:59" (1/1) ... [2020-10-27 15:59:59,816 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 15:59:59,819 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 15:59:59,820 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 15:59:59,820 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 15:59:59,821 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:59:59" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 15:59:59,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 15:59:59,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 15:59:59,910 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 15:59:59,910 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 15:59:59,910 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 15:59:59,910 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 15:59:59,911 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 15:59:59,911 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 15:59:59,911 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 15:59:59,911 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 15:59:59,912 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 15:59:59,912 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 15:59:59,913 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 15:59:59,913 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 15:59:59,913 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 15:59:59,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 15:59:59,914 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 15:59:59,914 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 15:59:59,914 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 15:59:59,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 15:59:59,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 15:59:59,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 15:59:59,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 15:59:59,915 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 15:59:59,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 16:00:05,672 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 16:00:05,673 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 16:00:05,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:00:05 BoogieIcfgContainer [2020-10-27 16:00:05,676 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 16:00:05,678 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 16:00:05,679 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 16:00:05,683 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 16:00:05,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 03:59:56" (1/3) ... [2020-10-27 16:00:05,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1306ccb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:00:05, skipping insertion in model container [2020-10-27 16:00:05,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:59:59" (2/3) ... [2020-10-27 16:00:05,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1306ccb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:00:05, skipping insertion in model container [2020-10-27 16:00:05,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:00:05" (3/3) ... [2020-10-27 16:00:05,686 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem04_label34.c [2020-10-27 16:00:05,700 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 16:00:05,706 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 16:00:05,721 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 16:00:05,757 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 16:00:05,758 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 16:00:05,758 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 16:00:05,758 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 16:00:05,758 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 16:00:05,758 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 16:00:05,758 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 16:00:05,758 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 16:00:05,801 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states. [2020-10-27 16:00:05,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 802 [2020-10-27 16:00:05,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:00:05,870 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] [2020-10-27 16:00:05,870 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:00:05,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:00:05,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1790565456, now seen corresponding path program 1 times [2020-10-27 16:00:05,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:00:05,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528761657] [2020-10-27 16:00:05,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:00:06,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:00:07,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:00:10,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:00:11,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:00:11,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 817 [2020-10-27 16:00:11,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:00:11,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5152 [2020-10-27 16:00:11,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:00:11,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 16:00:11,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 16:00:11,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 742 [2020-10-27 16:00:11,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 16:00:14,285 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2020-10-27 16:00:14,431 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2020-10-27 16:00:14,633 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2020-10-27 16:00:14,851 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2020-10-27 16:00:15,062 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2020-10-27 16:00:15,221 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 34 [2020-10-27 16:00:15,395 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 30 [2020-10-27 16:00:16,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:00:16,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:00:16,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:00:16,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:00:16,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:00:16,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:00:16,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 16:00:16,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:00:16,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:00:16,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:00:16,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 16:00:16,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:00:21,577 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 16:00:21,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528761657] [2020-10-27 16:00:21,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 16:00:21,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-27 16:00:21,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121240891] [2020-10-27 16:00:21,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 16:00:21,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:00:21,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 16:00:21,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-27 16:00:21,607 INFO L87 Difference]: Start difference. First operand 910 states. Second operand 18 states. [2020-10-27 16:00:21,927 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-27 16:00:22,170 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-27 16:00:22,418 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-27 16:00:22,717 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 16:00:23,222 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-27 16:00:23,652 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-27 16:00:26,734 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-27 16:00:27,340 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 136 [2020-10-27 16:00:30,204 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-27 16:00:30,640 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 118 [2020-10-27 16:00:32,397 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 115 [2020-10-27 16:00:37,342 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-10-27 16:00:37,552 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-27 16:00:43,794 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-10-27 16:00:44,010 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-27 16:00:47,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:00:47,380 INFO L93 Difference]: Finished difference Result 2553 states and 4911 transitions. [2020-10-27 16:00:47,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 16:00:47,382 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 801 [2020-10-27 16:00:47,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:00:47,428 INFO L225 Difference]: With dead ends: 2553 [2020-10-27 16:00:47,428 INFO L226 Difference]: Without dead ends: 1581 [2020-10-27 16:00:47,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 16:00:47,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1581 states. [2020-10-27 16:00:47,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 1581. [2020-10-27 16:00:47,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1581 states. [2020-10-27 16:00:47,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 2340 transitions. [2020-10-27 16:00:47,641 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 2340 transitions. Word has length 801 [2020-10-27 16:00:47,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:00:47,645 INFO L481 AbstractCegarLoop]: Abstraction has 1581 states and 2340 transitions. [2020-10-27 16:00:47,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 16:00:47,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 2340 transitions. [2020-10-27 16:00:47,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 821 [2020-10-27 16:00:47,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:00:47,686 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 16:00:47,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 16:00:47,687 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:00:47,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:00:47,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1452545601, now seen corresponding path program 1 times [2020-10-27 16:00:47,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:00:47,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054296708] [2020-10-27 16:00:47,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:00:47,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:00:48,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:00:48,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:00:51,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:00:53,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:00:53,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 838 [2020-10-27 16:00:53,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 16:00:53,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-27 16:00:53,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:00:53,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 16:00:53,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 16:00:53,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 705 [2020-10-27 16:00:53,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:00:55,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:00:55,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:00:55,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:00:55,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:00:55,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:00:55,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:00:55,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 16:00:55,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:00:55,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:00:55,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:00:55,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:00:55,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:00:55,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:00:55,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:00:55,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:00:55,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:00:55,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 16:00:55,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:00:55,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 16:00:55,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:00:55,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:00:55,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:00:55,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 16:00:55,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:00:59,855 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:00:59,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054296708] [2020-10-27 16:00:59,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:00:59,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 16:00:59,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588043137] [2020-10-27 16:00:59,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 16:00:59,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:00:59,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 16:00:59,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2020-10-27 16:00:59,868 INFO L87 Difference]: Start difference. First operand 1581 states and 2340 transitions. Second operand 19 states. [2020-10-27 16:01:00,362 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-27 16:01:00,591 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 16:01:01,101 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-27 16:01:05,061 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 16:01:06,646 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-27 16:01:08,456 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-27 16:01:09,112 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-27 16:01:09,328 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-27 16:01:10,816 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-27 16:01:17,567 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-27 16:01:17,782 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-10-27 16:01:25,937 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-27 16:01:26,159 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-10-27 16:01:29,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:01:29,060 INFO L93 Difference]: Finished difference Result 3125 states and 5330 transitions. [2020-10-27 16:01:29,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 16:01:29,064 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 820 [2020-10-27 16:01:29,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:01:29,078 INFO L225 Difference]: With dead ends: 3125 [2020-10-27 16:01:29,078 INFO L226 Difference]: Without dead ends: 2277 [2020-10-27 16:01:29,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2020-10-27 16:01:29,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2020-10-27 16:01:29,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 2277. [2020-10-27 16:01:29,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2277 states. [2020-10-27 16:01:29,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2277 states to 2277 states and 3046 transitions. [2020-10-27 16:01:29,166 INFO L78 Accepts]: Start accepts. Automaton has 2277 states and 3046 transitions. Word has length 820 [2020-10-27 16:01:29,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:01:29,167 INFO L481 AbstractCegarLoop]: Abstraction has 2277 states and 3046 transitions. [2020-10-27 16:01:29,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 16:01:29,168 INFO L276 IsEmpty]: Start isEmpty. Operand 2277 states and 3046 transitions. [2020-10-27 16:01:29,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 828 [2020-10-27 16:01:29,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:01:29,180 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:01:29,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 16:01:29,180 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:01:29,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:01:29,181 INFO L82 PathProgramCache]: Analyzing trace with hash -197476750, now seen corresponding path program 1 times [2020-10-27 16:01:29,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:01:29,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056672988] [2020-10-27 16:01:29,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:01:29,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:01:29,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:01:29,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:01:30,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:01:34,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:01:34,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 845 [2020-10-27 16:01:34,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 16:01:34,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-27 16:01:34,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:01:34,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 16:01:34,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-27 16:01:34,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 805 [2020-10-27 16:01:34,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:01:34,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:01:34,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:01:34,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:01:34,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:01:34,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:01:34,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:01:34,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 16:01:34,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:01:34,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:01:34,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:01:34,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:01:34,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:01:34,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:01:34,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:01:34,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:01:34,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:01:34,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 16:01:34,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:01:35,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 16:01:35,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:01:35,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:01:35,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:01:35,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 16:01:35,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:01:35,727 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:01:35,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056672988] [2020-10-27 16:01:35,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:01:35,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 16:01:35,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576369316] [2020-10-27 16:01:35,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 16:01:35,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:01:35,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 16:01:35,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 16:01:35,731 INFO L87 Difference]: Start difference. First operand 2277 states and 3046 transitions. Second operand 5 states. [2020-10-27 16:01:46,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:01:46,698 INFO L93 Difference]: Finished difference Result 4666 states and 6967 transitions. [2020-10-27 16:01:46,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 16:01:46,699 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 827 [2020-10-27 16:01:46,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:01:46,718 INFO L225 Difference]: With dead ends: 4666 [2020-10-27 16:01:46,719 INFO L226 Difference]: Without dead ends: 3122 [2020-10-27 16:01:46,723 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 16:01:46,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3122 states. [2020-10-27 16:01:46,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3122 to 3122. [2020-10-27 16:01:46,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3122 states. [2020-10-27 16:01:46,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3122 states to 3122 states and 4187 transitions. [2020-10-27 16:01:46,817 INFO L78 Accepts]: Start accepts. Automaton has 3122 states and 4187 transitions. Word has length 827 [2020-10-27 16:01:46,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:01:46,819 INFO L481 AbstractCegarLoop]: Abstraction has 3122 states and 4187 transitions. [2020-10-27 16:01:46,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 16:01:46,819 INFO L276 IsEmpty]: Start isEmpty. Operand 3122 states and 4187 transitions. [2020-10-27 16:01:46,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 836 [2020-10-27 16:01:46,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:01:46,834 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:01:46,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 16:01:46,835 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:01:46,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:01:46,836 INFO L82 PathProgramCache]: Analyzing trace with hash -652147504, now seen corresponding path program 1 times [2020-10-27 16:01:46,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:01:46,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077825881] [2020-10-27 16:01:46,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:01:47,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:01:47,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:01:47,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:01:50,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:01:52,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:01:52,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 855 [2020-10-27 16:01:52,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 16:01:52,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 16:01:52,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:01:52,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 16:01:52,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-27 16:01:52,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 805 [2020-10-27 16:01:52,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:01:52,532 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 16:01:52,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:01:52,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:01:52,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:01:52,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:01:52,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:01:52,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:01:52,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 16:01:52,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:01:52,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:01:52,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:01:52,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:01:52,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:01:52,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:01:52,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:01:52,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:01:52,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:01:52,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 16:01:52,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:01:52,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 16:01:52,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:01:52,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:01:52,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:01:52,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:01:52,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:01:52,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-27 16:01:52,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:01:52,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:01:52,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:01:52,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 16:01:52,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:01:52,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 16:01:52,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:01:52,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:01:52,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:01:52,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 16:01:52,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:01:53,475 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 16:01:53,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077825881] [2020-10-27 16:01:53,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:01:53,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 16:01:53,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060061214] [2020-10-27 16:01:53,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 16:01:53,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:01:53,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 16:01:53,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 16:01:53,479 INFO L87 Difference]: Start difference. First operand 3122 states and 4187 transitions. Second operand 6 states. [2020-10-27 16:01:53,618 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-27 16:01:54,022 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-27 16:02:11,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:02:11,451 INFO L93 Difference]: Finished difference Result 8891 states and 13246 transitions. [2020-10-27 16:02:11,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 16:02:11,452 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 835 [2020-10-27 16:02:11,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:02:11,493 INFO L225 Difference]: With dead ends: 8891 [2020-10-27 16:02:11,493 INFO L226 Difference]: Without dead ends: 6502 [2020-10-27 16:02:11,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 16:02:11,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6502 states. [2020-10-27 16:02:11,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6502 to 6502. [2020-10-27 16:02:11,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6502 states. [2020-10-27 16:02:11,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6502 states to 6502 states and 8855 transitions. [2020-10-27 16:02:11,701 INFO L78 Accepts]: Start accepts. Automaton has 6502 states and 8855 transitions. Word has length 835 [2020-10-27 16:02:11,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:02:11,703 INFO L481 AbstractCegarLoop]: Abstraction has 6502 states and 8855 transitions. [2020-10-27 16:02:11,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 16:02:11,703 INFO L276 IsEmpty]: Start isEmpty. Operand 6502 states and 8855 transitions. [2020-10-27 16:02:11,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 876 [2020-10-27 16:02:11,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:02:11,731 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:02:11,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 16:02:11,732 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:02:11,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:02:11,733 INFO L82 PathProgramCache]: Analyzing trace with hash -569440352, now seen corresponding path program 1 times [2020-10-27 16:02:11,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:02:11,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251026304] [2020-10-27 16:02:11,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:02:11,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:02:11,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:02:12,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:02:14,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:02:16,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:02:16,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 895 [2020-10-27 16:02:16,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 16:02:16,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5115 [2020-10-27 16:02:16,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:02:16,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 16:02:16,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-27 16:02:16,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 621 [2020-10-27 16:02:16,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:02:18,370 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 16:02:18,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:02:18,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:02:18,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:02:18,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:02:18,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:02:18,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:02:18,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 16:02:18,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:02:18,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:02:18,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:02:18,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:02:18,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:02:18,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:02:18,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:02:18,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:02:18,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:02:18,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 16:02:18,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:02:18,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 16:02:18,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:02:18,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:02:18,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:02:18,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:02:18,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:02:18,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-27 16:02:18,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:02:18,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:02:18,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:02:18,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 16:02:18,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:02:18,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-27 16:02:18,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:02:18,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:02:18,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:02:18,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 16:02:18,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:02:23,533 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 69 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-10-27 16:02:23,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251026304] [2020-10-27 16:02:23,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:02:23,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 16:02:23,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558563760] [2020-10-27 16:02:23,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 16:02:23,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:02:23,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 16:02:23,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-10-27 16:02:23,536 INFO L87 Difference]: Start difference. First operand 6502 states and 8855 transitions. Second operand 17 states. [2020-10-27 16:02:24,243 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-27 16:02:24,480 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-27 16:02:25,278 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 16:02:29,679 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 16:02:29,897 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 16:02:31,519 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-27 16:02:32,855 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-27 16:02:35,405 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-27 16:02:35,613 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-27 16:02:36,326 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-27 16:02:39,118 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-10-27 16:02:41,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:02:41,029 INFO L93 Difference]: Finished difference Result 12885 states and 18218 transitions. [2020-10-27 16:02:41,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 16:02:41,030 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 875 [2020-10-27 16:02:41,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:02:41,069 INFO L225 Difference]: With dead ends: 12885 [2020-10-27 16:02:41,069 INFO L226 Difference]: Without dead ends: 7116 [2020-10-27 16:02:41,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2020-10-27 16:02:41,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7116 states. [2020-10-27 16:02:41,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7116 to 7116. [2020-10-27 16:02:41,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7116 states. [2020-10-27 16:02:41,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7116 states to 7116 states and 9482 transitions. [2020-10-27 16:02:41,262 INFO L78 Accepts]: Start accepts. Automaton has 7116 states and 9482 transitions. Word has length 875 [2020-10-27 16:02:41,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:02:41,263 INFO L481 AbstractCegarLoop]: Abstraction has 7116 states and 9482 transitions. [2020-10-27 16:02:41,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 16:02:41,263 INFO L276 IsEmpty]: Start isEmpty. Operand 7116 states and 9482 transitions. [2020-10-27 16:02:41,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 889 [2020-10-27 16:02:41,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:02:41,290 INFO L422 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 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] [2020-10-27 16:02:41,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 16:02:41,291 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:02:41,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:02:41,291 INFO L82 PathProgramCache]: Analyzing trace with hash -856757917, now seen corresponding path program 1 times [2020-10-27 16:02:41,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:02:41,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727293197] [2020-10-27 16:02:41,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:02:41,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:02:41,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:02:41,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:02:41,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:02:44,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:02:44,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:02:46,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:02:46,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 910 [2020-10-27 16:02:46,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 16:02:46,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-27 16:02:46,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:02:46,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 16:02:46,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 101 [2020-10-27 16:02:46,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 568 [2020-10-27 16:02:46,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:02:47,951 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-10-27 16:02:48,112 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-10-27 16:02:48,441 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 50 [2020-10-27 16:02:48,719 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 47 [2020-10-27 16:02:48,888 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2020-10-27 16:02:49,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:02:49,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:02:49,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:02:49,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:02:49,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:02:49,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:02:49,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 16:02:49,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:02:49,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:02:49,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:02:49,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:02:49,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:02:49,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:02:49,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:02:49,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:02:49,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:02:49,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 16:02:49,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:02:49,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 16:02:49,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:02:49,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:02:49,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:02:49,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:02:49,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:02:49,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-27 16:02:49,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:02:49,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:02:49,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:02:49,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 16:02:49,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:02:49,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 16:02:49,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:02:49,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:02:49,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:02:49,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:02:49,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:02:49,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-27 16:02:49,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:02:49,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:02:49,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:02:49,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 16:02:49,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:02:49,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-27 16:02:49,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:02:49,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:02:49,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:02:49,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 16:02:49,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:02:54,790 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 81 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-27 16:02:54,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727293197] [2020-10-27 16:02:54,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:02:54,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 16:02:54,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127682825] [2020-10-27 16:02:54,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 16:02:54,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:02:54,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 16:02:54,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-10-27 16:02:54,793 INFO L87 Difference]: Start difference. First operand 7116 states and 9482 transitions. Second operand 17 states. [2020-10-27 16:02:55,762 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-27 16:02:56,032 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-27 16:02:57,591 WARN L193 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 133 [2020-10-27 16:02:58,777 WARN L193 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 132 [2020-10-27 16:03:03,226 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-27 16:03:03,953 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-27 16:03:04,187 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 16:03:07,626 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 117 [2020-10-27 16:03:08,213 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 16:03:10,600 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-10-27 16:03:10,798 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-27 16:03:15,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:03:15,952 INFO L93 Difference]: Finished difference Result 14070 states and 19383 transitions. [2020-10-27 16:03:15,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 16:03:15,954 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 888 [2020-10-27 16:03:15,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:03:15,999 INFO L225 Difference]: With dead ends: 14070 [2020-10-27 16:03:16,000 INFO L226 Difference]: Without dead ends: 7687 [2020-10-27 16:03:16,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2020-10-27 16:03:16,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7687 states. [2020-10-27 16:03:16,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7687 to 7685. [2020-10-27 16:03:16,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7685 states. [2020-10-27 16:03:16,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7685 states to 7685 states and 10068 transitions. [2020-10-27 16:03:16,209 INFO L78 Accepts]: Start accepts. Automaton has 7685 states and 10068 transitions. Word has length 888 [2020-10-27 16:03:16,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:03:16,210 INFO L481 AbstractCegarLoop]: Abstraction has 7685 states and 10068 transitions. [2020-10-27 16:03:16,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 16:03:16,210 INFO L276 IsEmpty]: Start isEmpty. Operand 7685 states and 10068 transitions. [2020-10-27 16:03:16,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 894 [2020-10-27 16:03:16,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:03:16,236 INFO L422 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 16:03:16,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 16:03:16,236 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:03:16,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:03:16,237 INFO L82 PathProgramCache]: Analyzing trace with hash 314364210, now seen corresponding path program 1 times [2020-10-27 16:03:16,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:03:16,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2093489962] [2020-10-27 16:03:16,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:03:16,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:03:16,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:03:16,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:03:17,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:03:21,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:03:21,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 915 [2020-10-27 16:03:21,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 16:03:21,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 16:03:21,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:03:21,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 16:03:21,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-27 16:03:21,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 16:03:21,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:03:21,636 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 16:03:21,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:03:21,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:03:21,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:03:21,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:03:21,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:03:21,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:03:21,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 16:03:21,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:03:21,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:03:21,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:03:21,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:03:21,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:03:21,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:03:21,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:03:21,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:03:21,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:03:21,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 16:03:21,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:03:21,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 16:03:21,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:03:21,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:03:21,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:03:21,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:03:21,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:03:21,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-27 16:03:21,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:03:21,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:03:21,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:03:21,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 16:03:21,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:03:21,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 16:03:21,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:03:21,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:03:21,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:03:21,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 16:03:21,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:03:21,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-27 16:03:21,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:03:21,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:03:21,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:03:21,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 16:03:21,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:03:21,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-27 16:03:21,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:03:21,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 16:03:21,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 16:03:21,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 16:03:21,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:03:22,277 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 116 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 16:03:22,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2093489962] [2020-10-27 16:03:22,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:03:22,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 16:03:22,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29980056] [2020-10-27 16:03:22,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 16:03:22,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:03:22,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 16:03:22,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 16:03:22,280 INFO L87 Difference]: Start difference. First operand 7685 states and 10068 transitions. Second operand 7 states. [2020-10-27 16:03:22,412 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-27 16:03:25,813 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-27 16:03:36,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:03:36,799 INFO L93 Difference]: Finished difference Result 19978 states and 27739 transitions. [2020-10-27 16:03:36,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 16:03:36,800 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 893 [2020-10-27 16:03:36,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:03:36,844 INFO L225 Difference]: With dead ends: 19978 [2020-10-27 16:03:36,845 INFO L226 Difference]: Without dead ends: 13026 [2020-10-27 16:03:36,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 16:03:36,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13026 states. [2020-10-27 16:03:37,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13026 to 12970. [2020-10-27 16:03:37,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12970 states. [2020-10-27 16:03:37,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12970 states to 12970 states and 16676 transitions. [2020-10-27 16:03:37,166 INFO L78 Accepts]: Start accepts. Automaton has 12970 states and 16676 transitions. Word has length 893 [2020-10-27 16:03:37,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:03:37,167 INFO L481 AbstractCegarLoop]: Abstraction has 12970 states and 16676 transitions. [2020-10-27 16:03:37,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 16:03:37,167 INFO L276 IsEmpty]: Start isEmpty. Operand 12970 states and 16676 transitions. [2020-10-27 16:03:37,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 976 [2020-10-27 16:03:37,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:03:37,212 INFO L422 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 16:03:37,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 16:03:37,212 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:03:37,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:03:37,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1137588362, now seen corresponding path program 1 times [2020-10-27 16:03:37,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:03:37,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826720126] [2020-10-27 16:03:37,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:03:37,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:03:37,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:03:37,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:03:38,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:03:38,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking...