/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/Problem13_label34.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 18:01:57,720 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 18:01:57,723 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 18:01:57,759 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 18:01:57,760 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 18:01:57,762 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 18:01:57,763 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 18:01:57,766 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 18:01:57,769 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 18:01:57,770 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 18:01:57,772 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 18:01:57,773 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 18:01:57,774 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 18:01:57,775 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 18:01:57,777 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 18:01:57,778 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 18:01:57,779 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 18:01:57,781 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 18:01:57,783 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 18:01:57,786 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 18:01:57,788 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 18:01:57,796 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 18:01:57,797 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 18:01:57,799 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 18:01:57,825 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 18:01:57,825 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 18:01:57,826 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 18:01:57,827 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 18:01:57,828 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 18:01:57,829 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 18:01:57,829 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 18:01:57,831 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 18:01:57,832 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 18:01:57,833 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 18:01:57,835 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 18:01:57,835 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 18:01:57,836 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 18:01:57,836 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 18:01:57,837 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 18:01:57,838 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 18:01:57,839 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 18:01:57,840 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 18:01:57,869 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 18:01:57,869 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 18:01:57,871 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 18:01:57,871 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 18:01:57,872 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 18:01:57,872 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 18:01:57,872 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 18:01:57,872 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 18:01:57,873 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 18:01:57,873 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 18:01:57,873 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 18:01:57,874 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 18:01:57,874 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 18:01:57,874 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 18:01:57,875 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 18:01:57,875 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 18:01:57,875 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 18:01:57,876 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 18:01:57,876 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 18:01:57,876 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 18:01:57,876 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 18:01:57,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:01:57,877 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 18:01:57,877 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 18:01:57,878 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 18:01:57,878 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 18:01:57,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 18:01:57,879 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 18:01:57,879 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 18:01:57,879 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 18:01:58,320 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 18:01:58,353 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 18:01:58,357 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 18:01:58,359 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 18:01:58,360 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 18:01:58,361 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label34.c [2020-10-27 18:01:58,453 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9b158830d/b8db932139e046d1930e7614c5a8c3a5/FLAG4b792b1ef [2020-10-27 18:01:59,585 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 18:01:59,586 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label34.c [2020-10-27 18:01:59,645 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9b158830d/b8db932139e046d1930e7614c5a8c3a5/FLAG4b792b1ef [2020-10-27 18:01:59,977 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9b158830d/b8db932139e046d1930e7614c5a8c3a5 [2020-10-27 18:01:59,981 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 18:01:59,989 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 18:01:59,993 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 18:01:59,993 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 18:01:59,998 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 18:01:59,999 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:01:59" (1/1) ... [2020-10-27 18:02:00,005 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dd4ab53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:02:00, skipping insertion in model container [2020-10-27 18:02:00,005 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:01:59" (1/1) ... [2020-10-27 18:02:00,016 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 18:02:00,236 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 18:02:01,900 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:02:01,923 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 18:02:02,701 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:02:02,736 INFO L208 MainTranslator]: Completed translation [2020-10-27 18:02:02,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:02:02 WrapperNode [2020-10-27 18:02:02,737 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 18:02:02,739 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 18:02:02,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 18:02:02,739 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 18:02:02,754 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:02:02" (1/1) ... [2020-10-27 18:02:02,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:02:02" (1/1) ... [2020-10-27 18:02:02,840 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:02:02" (1/1) ... [2020-10-27 18:02:02,841 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:02:02" (1/1) ... [2020-10-27 18:02:02,984 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:02:02" (1/1) ... [2020-10-27 18:02:03,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:02:02" (1/1) ... [2020-10-27 18:02:03,063 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:02:02" (1/1) ... [2020-10-27 18:02:03,099 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 18:02:03,100 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 18:02:03,100 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 18:02:03,101 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 18:02:03,102 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:02:02" (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 18:02:03,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 18:02:03,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 18:02:03,185 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 18:02:03,186 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 18:02:03,186 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 18:02:03,186 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 18:02:03,186 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 18:02:03,186 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 18:02:03,186 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 18:02:03,187 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 18:02:03,187 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 18:02:03,187 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 18:02:03,187 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 18:02:03,187 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 18:02:03,188 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 18:02:03,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 18:02:03,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 18:02:03,188 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 18:02:03,188 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 18:02:03,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 18:02:03,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 18:02:03,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 18:02:03,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 18:02:03,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 18:02:03,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 18:02:13,529 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 18:02:13,530 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 18:02:13,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:02:13 BoogieIcfgContainer [2020-10-27 18:02:13,534 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 18:02:13,537 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 18:02:13,537 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 18:02:13,541 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 18:02:13,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:01:59" (1/3) ... [2020-10-27 18:02:13,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b402395 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:02:13, skipping insertion in model container [2020-10-27 18:02:13,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:02:02" (2/3) ... [2020-10-27 18:02:13,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b402395 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:02:13, skipping insertion in model container [2020-10-27 18:02:13,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:02:13" (3/3) ... [2020-10-27 18:02:13,545 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label34.c [2020-10-27 18:02:13,558 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 18:02:13,571 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 18:02:13,586 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 18:02:13,695 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 18:02:13,695 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 18:02:13,695 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 18:02:13,695 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 18:02:13,695 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 18:02:13,695 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 18:02:13,696 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 18:02:13,696 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 18:02:13,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-27 18:02:13,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 18:02:13,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:02:13,779 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] [2020-10-27 18:02:13,780 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:02:13,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:02:13,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1061433682, now seen corresponding path program 1 times [2020-10-27 18:02:13,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:02:13,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770648904] [2020-10-27 18:02:13,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:02:14,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:02:14,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:14,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:02:14,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 18:02:14,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:02:14,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 712 [2020-10-27 18:02:14,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:02:14,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 18:02:14,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:02:14,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 18:02:14,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:02:14,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:02:14,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:02:14,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:14,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:02:15,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:02:15,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:02:15,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-27 18:02:15,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:02:15,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:02:15,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:02:15,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:02:15,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:02:15,030 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 18:02:15,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770648904] [2020-10-27 18:02:15,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 18:02:15,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 18:02:15,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507030400] [2020-10-27 18:02:15,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 18:02:15,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:02:15,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 18:02:15,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 18:02:15,067 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-10-27 18:02:34,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:02:34,704 INFO L93 Difference]: Finished difference Result 3209 states and 5919 transitions. [2020-10-27 18:02:34,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:02:34,707 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-10-27 18:02:34,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:02:34,749 INFO L225 Difference]: With dead ends: 3209 [2020-10-27 18:02:34,750 INFO L226 Difference]: Without dead ends: 2007 [2020-10-27 18:02:34,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:02:34,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2007 states. [2020-10-27 18:02:35,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2007 to 1921. [2020-10-27 18:02:35,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1921 states. [2020-10-27 18:02:35,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 3312 transitions. [2020-10-27 18:02:35,050 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 3312 transitions. Word has length 63 [2020-10-27 18:02:35,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:02:35,052 INFO L481 AbstractCegarLoop]: Abstraction has 1921 states and 3312 transitions. [2020-10-27 18:02:35,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 18:02:35,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 3312 transitions. [2020-10-27 18:02:35,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-27 18:02:35,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:02:35,071 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:02:35,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 18:02:35,071 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:02:35,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:02:35,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1429707475, now seen corresponding path program 1 times [2020-10-27 18:02:35,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:02:35,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174491517] [2020-10-27 18:02:35,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:02:35,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:02:35,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:35,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:36,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:37,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:02:37,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-27 18:02:37,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:02:37,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2343 [2020-10-27 18:02:37,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:02:37,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:02:37,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-27 18:02:37,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 18:02:37,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:02:37,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:02:37,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:02:37,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:37,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:02:37,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:02:37,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:02:37,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 18:02:37,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:02:37,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:02:37,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:02:37,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:02:37,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-27 18:02:37,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:02:37,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:02:37,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:37,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:02:37,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 18:02:37,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:02:37,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-27 18:02:37,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:02:37,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:02:37,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:02:37,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 18:02:37,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:02:38,062 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:02:38,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174491517] [2020-10-27 18:02:38,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:02:38,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:02:38,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893071755] [2020-10-27 18:02:38,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:02:38,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:02:38,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:02:38,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:02:38,069 INFO L87 Difference]: Start difference. First operand 1921 states and 3312 transitions. Second operand 5 states. [2020-10-27 18:02:38,681 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-27 18:02:57,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:02:57,247 INFO L93 Difference]: Finished difference Result 3868 states and 6662 transitions. [2020-10-27 18:02:57,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:02:57,248 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2020-10-27 18:02:57,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:02:57,266 INFO L225 Difference]: With dead ends: 3868 [2020-10-27 18:02:57,266 INFO L226 Difference]: Without dead ends: 1936 [2020-10-27 18:02:57,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 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 18:02:57,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2020-10-27 18:02:57,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1921. [2020-10-27 18:02:57,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1921 states. [2020-10-27 18:02:57,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 3310 transitions. [2020-10-27 18:02:57,347 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 3310 transitions. Word has length 132 [2020-10-27 18:02:57,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:02:57,348 INFO L481 AbstractCegarLoop]: Abstraction has 1921 states and 3310 transitions. [2020-10-27 18:02:57,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:02:57,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 3310 transitions. [2020-10-27 18:02:57,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-27 18:02:57,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:02:57,351 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:02:57,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 18:02:57,351 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:02:57,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:02:57,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1404344453, now seen corresponding path program 1 times [2020-10-27 18:02:57,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:02:57,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524637529] [2020-10-27 18:02:57,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:02:57,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:02:57,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:57,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:58,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:02:58,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-27 18:02:58,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:02:58,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1502 [2020-10-27 18:02:58,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:02:58,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:02:58,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-27 18:02:58,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 18:02:58,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:02:59,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:02:59,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:02:59,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:59,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:02:59,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:02:59,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:02:59,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:02:59,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:02:59,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:02:59,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:02:59,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:02:59,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:02:59,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:02:59,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:02:59,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:59,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:02:59,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 18:02:59,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:02:59,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-27 18:02:59,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:02:59,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:02:59,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:02:59,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 18:02:59,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:02:59,303 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:02:59,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524637529] [2020-10-27 18:02:59,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:02:59,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 18:02:59,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316669615] [2020-10-27 18:02:59,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 18:02:59,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:02:59,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 18:02:59,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:02:59,308 INFO L87 Difference]: Start difference. First operand 1921 states and 3310 transitions. Second operand 6 states. [2020-10-27 18:02:59,443 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 18:03:30,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:03:30,195 INFO L93 Difference]: Finished difference Result 7182 states and 12666 transitions. [2020-10-27 18:03:30,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 18:03:30,197 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 133 [2020-10-27 18:03:30,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:03:30,237 INFO L225 Difference]: With dead ends: 7182 [2020-10-27 18:03:30,238 INFO L226 Difference]: Without dead ends: 5267 [2020-10-27 18:03:30,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 18:03:30,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5267 states. [2020-10-27 18:03:30,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5267 to 5236. [2020-10-27 18:03:30,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5236 states. [2020-10-27 18:03:30,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5236 states to 5236 states and 8657 transitions. [2020-10-27 18:03:30,472 INFO L78 Accepts]: Start accepts. Automaton has 5236 states and 8657 transitions. Word has length 133 [2020-10-27 18:03:30,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:03:30,472 INFO L481 AbstractCegarLoop]: Abstraction has 5236 states and 8657 transitions. [2020-10-27 18:03:30,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 18:03:30,473 INFO L276 IsEmpty]: Start isEmpty. Operand 5236 states and 8657 transitions. [2020-10-27 18:03:30,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-27 18:03:30,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:03:30,486 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:03:30,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 18:03:30,487 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:03:30,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:03:30,490 INFO L82 PathProgramCache]: Analyzing trace with hash -102553379, now seen corresponding path program 1 times [2020-10-27 18:03:30,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:03:30,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141849385] [2020-10-27 18:03:30,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:03:30,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:03:30,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:03:31,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:03:31,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:03:31,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-27 18:03:31,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:03:31,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1340 [2020-10-27 18:03:31,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:03:31,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:03:31,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 119 [2020-10-27 18:03:31,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 18:03:31,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:03:32,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:03:32,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:03:32,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:03:32,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:03:32,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:03:32,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:03:32,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:03:32,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:03:32,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:03:32,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:03:32,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:03:32,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:03:32,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:03:32,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:03:32,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:03:32,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:03:32,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 18:03:32,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:03:32,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 214 [2020-10-27 18:03:32,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:03:32,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:03:32,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:03:32,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-27 18:03:32,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:03:32,602 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:03:32,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141849385] [2020-10-27 18:03:32,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:03:32,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:03:32,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252613468] [2020-10-27 18:03:32,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:03:32,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:03:32,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:03:32,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:03:32,607 INFO L87 Difference]: Start difference. First operand 5236 states and 8657 transitions. Second operand 5 states. [2020-10-27 18:04:00,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:04:00,639 INFO L93 Difference]: Finished difference Result 15372 states and 26055 transitions. [2020-10-27 18:04:00,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:04:00,642 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 172 [2020-10-27 18:04:00,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:04:00,715 INFO L225 Difference]: With dead ends: 15372 [2020-10-27 18:04:00,715 INFO L226 Difference]: Without dead ends: 10142 [2020-10-27 18:04:00,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 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 18:04:00,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10142 states. [2020-10-27 18:04:01,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10142 to 10121. [2020-10-27 18:04:01,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10121 states. [2020-10-27 18:04:01,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10121 states to 10121 states and 15539 transitions. [2020-10-27 18:04:01,146 INFO L78 Accepts]: Start accepts. Automaton has 10121 states and 15539 transitions. Word has length 172 [2020-10-27 18:04:01,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:04:01,151 INFO L481 AbstractCegarLoop]: Abstraction has 10121 states and 15539 transitions. [2020-10-27 18:04:01,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:04:01,152 INFO L276 IsEmpty]: Start isEmpty. Operand 10121 states and 15539 transitions. [2020-10-27 18:04:01,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-27 18:04:01,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:04:01,162 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:04:01,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 18:04:01,163 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:04:01,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:04:01,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1111617830, now seen corresponding path program 1 times [2020-10-27 18:04:01,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:04:01,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779899940] [2020-10-27 18:04:01,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:04:01,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:04:01,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:04:01,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:04:02,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:04:03,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:04:05,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:04:06,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:04:06,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 245 [2020-10-27 18:04:06,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 18:04:06,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 18:04:06,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:04:06,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:04:06,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 180 [2020-10-27 18:04:06,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 18:04:06,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:04:06,470 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:04:06,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:04:06,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:04:06,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:04:06,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:04:06,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:04:06,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:04:06,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 18:04:06,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:04:06,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:04:06,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:04:06,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:04:06,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:04:06,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:04:06,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:04:06,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:04:06,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:04:06,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 18:04:06,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:04:06,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 18:04:06,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:04:06,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:04:06,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:04:06,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:04:06,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:04:06,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-27 18:04:06,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:04:06,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:04:06,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:04:06,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 18:04:06,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:04:06,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-27 18:04:06,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:04:06,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:04:06,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:04:06,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-27 18:04:06,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:04:06,882 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-10-27 18:04:06,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779899940] [2020-10-27 18:04:06,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:04:06,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:04:06,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69205768] [2020-10-27 18:04:06,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:04:06,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:04:06,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:04:06,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:04:06,887 INFO L87 Difference]: Start difference. First operand 10121 states and 15539 transitions. Second operand 5 states. [2020-10-27 18:04:07,669 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 18:04:36,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:04:36,703 INFO L93 Difference]: Finished difference Result 30011 states and 47802 transitions. [2020-10-27 18:04:36,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:04:36,709 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 231 [2020-10-27 18:04:36,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:04:36,835 INFO L225 Difference]: With dead ends: 30011 [2020-10-27 18:04:36,835 INFO L226 Difference]: Without dead ends: 19896 [2020-10-27 18:04:36,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:04:36,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19896 states. [2020-10-27 18:04:37,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19896 to 19872. [2020-10-27 18:04:37,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19872 states. [2020-10-27 18:04:37,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19872 states to 19872 states and 29273 transitions. [2020-10-27 18:04:37,676 INFO L78 Accepts]: Start accepts. Automaton has 19872 states and 29273 transitions. Word has length 231 [2020-10-27 18:04:37,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:04:37,677 INFO L481 AbstractCegarLoop]: Abstraction has 19872 states and 29273 transitions. [2020-10-27 18:04:37,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:04:37,678 INFO L276 IsEmpty]: Start isEmpty. Operand 19872 states and 29273 transitions. [2020-10-27 18:04:37,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-27 18:04:37,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:04:37,689 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:04:37,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 18:04:37,690 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:04:37,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:04:37,692 INFO L82 PathProgramCache]: Analyzing trace with hash -494391832, now seen corresponding path program 1 times [2020-10-27 18:04:37,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:04:37,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842247080] [2020-10-27 18:04:37,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:04:37,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:04:37,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:04:37,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:04:38,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:04:39,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:04:41,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:04:41,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 243 [2020-10-27 18:04:41,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:04:41,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3482 [2020-10-27 18:04:41,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:04:41,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:04:41,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 177 [2020-10-27 18:04:41,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 18:04:41,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:04:41,515 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:04:41,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:04:41,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:04:41,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:04:41,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:04:41,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:04:41,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:04:41,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 18:04:41,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:04:41,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:04:41,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:04:41,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:04:41,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:04:41,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:04:41,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:04:41,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:04:41,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:04:42,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:04:42,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-27 18:04:42,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:04:42,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 401 [2020-10-27 18:04:42,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:04:42,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:04:42,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 161 [2020-10-27 18:04:42,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:04:42,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:04:42,260 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:04:42,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842247080] [2020-10-27 18:04:42,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:04:42,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 18:04:42,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705530163] [2020-10-27 18:04:42,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 18:04:42,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:04:42,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 18:04:42,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:04:42,264 INFO L87 Difference]: Start difference. First operand 19872 states and 29273 transitions. Second operand 6 states. [2020-10-27 18:04:42,426 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 18:04:43,291 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 18:04:43,555 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 18:05:25,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:05:25,281 INFO L93 Difference]: Finished difference Result 60196 states and 93542 transitions. [2020-10-27 18:05:25,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 18:05:25,285 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 231 [2020-10-27 18:05:25,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:05:25,473 INFO L225 Difference]: With dead ends: 60196 [2020-10-27 18:05:25,474 INFO L226 Difference]: Without dead ends: 40330 [2020-10-27 18:05:25,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-27 18:05:25,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40330 states. [2020-10-27 18:05:26,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40330 to 40239. [2020-10-27 18:05:26,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40239 states. [2020-10-27 18:05:27,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40239 states to 40239 states and 56183 transitions. [2020-10-27 18:05:27,109 INFO L78 Accepts]: Start accepts. Automaton has 40239 states and 56183 transitions. Word has length 231 [2020-10-27 18:05:27,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:05:27,110 INFO L481 AbstractCegarLoop]: Abstraction has 40239 states and 56183 transitions. [2020-10-27 18:05:27,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 18:05:27,110 INFO L276 IsEmpty]: Start isEmpty. Operand 40239 states and 56183 transitions. [2020-10-27 18:05:27,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-10-27 18:05:27,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:05:27,130 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:05:27,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 18:05:27,131 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:05:27,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:05:27,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1456799362, now seen corresponding path program 1 times [2020-10-27 18:05:27,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:05:27,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536813601] [2020-10-27 18:05:27,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:05:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:05:27,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:05:27,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:05:29,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:05:29,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 281 [2020-10-27 18:05:29,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:05:29,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2168 [2020-10-27 18:05:29,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:05:29,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:05:29,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 216 [2020-10-27 18:05:29,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 18:05:29,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:05:29,648 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:05:29,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:05:29,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:05:29,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:05:29,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:05:29,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:05:29,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:05:29,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 18:05:29,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:05:29,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:05:29,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:05:29,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:05:29,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:05:29,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:05:29,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:05:29,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:05:30,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:05:30,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 207 [2020-10-27 18:05:30,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:05:30,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 250 [2020-10-27 18:05:30,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:05:30,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:05:30,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:05:30,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-27 18:05:30,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:05:30,211 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:05:30,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536813601] [2020-10-27 18:05:30,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:05:30,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:05:30,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180351228] [2020-10-27 18:05:30,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:05:30,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:05:30,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:05:30,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:05:30,215 INFO L87 Difference]: Start difference. First operand 40239 states and 56183 transitions. Second operand 5 states. [2020-10-27 18:05:30,370 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 66