/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/Problem19_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:22:42,250 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:22:42,256 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:22:42,320 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:22:42,320 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:22:42,330 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:22:42,332 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:22:42,338 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:22:42,342 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:22:42,351 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:22:42,353 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:22:42,354 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:22:42,355 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:22:42,358 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:22:42,359 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:22:42,364 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:22:42,369 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:22:42,370 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:22:42,372 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:22:42,375 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:22:42,377 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:22:42,379 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:22:42,380 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:22:42,382 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:22:42,385 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:22:42,386 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:22:42,386 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:22:42,387 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:22:42,388 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:22:42,389 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:22:42,390 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:22:42,391 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:22:42,392 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:22:42,392 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:22:42,394 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:22:42,394 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:22:42,395 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:22:42,396 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:22:42,396 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:22:42,397 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:22:42,398 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:22:42,401 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 19:22:42,439 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:22:42,439 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:22:42,441 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:22:42,441 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:22:42,441 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:22:42,442 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:22:42,442 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:22:42,442 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:22:42,442 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:22:42,443 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:22:42,443 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:22:42,443 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:22:42,443 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:22:42,443 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:22:42,444 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:22:42,444 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:22:42,444 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:22:42,444 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:22:42,445 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:22:42,445 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:22:42,445 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:22:42,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:22:42,446 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:22:42,446 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:22:42,446 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:22:42,446 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:22:42,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:22:42,447 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:22:42,447 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:22:42,447 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:22:42,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:22:42,930 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:22:42,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:22:42,936 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:22:42,937 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:22:42,939 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label17.c [2020-10-27 19:22:43,045 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/91199b71d/f577ac330d19431c9e6c8a192cd07c1e/FLAGa3d8b9043 [2020-10-27 19:22:44,467 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:22:44,468 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label17.c [2020-10-27 19:22:44,542 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/91199b71d/f577ac330d19431c9e6c8a192cd07c1e/FLAGa3d8b9043 [2020-10-27 19:22:44,700 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/91199b71d/f577ac330d19431c9e6c8a192cd07c1e [2020-10-27 19:22:44,704 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:22:44,711 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:22:44,713 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:22:44,713 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:22:44,718 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:22:44,719 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:22:44" (1/1) ... [2020-10-27 19:22:44,723 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48c096cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:22:44, skipping insertion in model container [2020-10-27 19:22:44,723 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:22:44" (1/1) ... [2020-10-27 19:22:44,733 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:22:44,929 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:22:47,074 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:22:47,088 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:22:48,293 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:22:48,351 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:22:48,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:22:48 WrapperNode [2020-10-27 19:22:48,352 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:22:48,353 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:22:48,353 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:22:48,353 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:22:48,367 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:22:48" (1/1) ... [2020-10-27 19:22:48,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:22:48" (1/1) ... [2020-10-27 19:22:48,523 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:22:48" (1/1) ... [2020-10-27 19:22:48,523 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:22:48" (1/1) ... [2020-10-27 19:22:48,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:22:48" (1/1) ... [2020-10-27 19:22:48,809 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:22:48" (1/1) ... [2020-10-27 19:22:48,998 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:22:48" (1/1) ... [2020-10-27 19:22:49,088 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:22:49,092 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:22:49,092 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:22:49,092 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:22:49,094 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:22:48" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:22:49,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:22:49,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:22:49,267 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:22:49,267 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 19:22:49,267 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 19:22:49,268 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 19:22:49,268 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 19:22:49,268 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 19:22:49,268 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 19:22:49,268 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:22:49,270 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 19:22:49,270 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 19:22:49,270 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 19:22:49,270 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 19:22:49,270 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 19:22:49,271 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 19:22:49,271 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:22:49,272 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:22:49,272 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:22:49,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:22:49,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 19:22:49,272 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 19:22:49,272 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:22:49,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:22:49,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:22:49,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:22:49,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:22:49,273 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:22:49,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:23:04,468 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:23:04,469 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 19:23:04,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:23:04 BoogieIcfgContainer [2020-10-27 19:23:04,474 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:23:04,477 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:23:04,477 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:23:04,481 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:23:04,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:22:44" (1/3) ... [2020-10-27 19:23:04,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60fbde7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:23:04, skipping insertion in model container [2020-10-27 19:23:04,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:22:48" (2/3) ... [2020-10-27 19:23:04,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60fbde7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:23:04, skipping insertion in model container [2020-10-27 19:23:04,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:23:04" (3/3) ... [2020-10-27 19:23:04,485 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label17.c [2020-10-27 19:23:04,499 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:23:04,517 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:23:04,533 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:23:04,572 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:23:04,572 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:23:04,572 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:23:04,572 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:23:04,572 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:23:04,573 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:23:04,573 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:23:04,573 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:23:04,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-27 19:23:04,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 19:23:04,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:23:04,634 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:23:04,634 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:23:04,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:23:04,642 INFO L82 PathProgramCache]: Analyzing trace with hash -796377282, now seen corresponding path program 1 times [2020-10-27 19:23:04,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:23:04,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153077027] [2020-10-27 19:23:04,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:23:04,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:23:04,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:23:05,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:23:05,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 19:23:05,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:23:05,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 445 [2020-10-27 19:23:05,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:23:05,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:23:05,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:23:05,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 19:23:05,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 19:23:05,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:23:05,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:23:05,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:23:05,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:23:05,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:23:05,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:23:05,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 19:23:05,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:23:05,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:23:05,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:23:05,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:23:05,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:23:05,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:23:05,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153077027] [2020-10-27 19:23:05,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:23:05,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 19:23:05,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284660589] [2020-10-27 19:23:05,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:23:05,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:23:05,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:23:05,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:23:05,565 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-27 19:23:39,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:23:39,776 INFO L93 Difference]: Finished difference Result 5116 states and 9607 transitions. [2020-10-27 19:23:39,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:23:39,779 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-27 19:23:39,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:23:39,831 INFO L225 Difference]: With dead ends: 5116 [2020-10-27 19:23:39,832 INFO L226 Difference]: Without dead ends: 3271 [2020-10-27 19:23:39,851 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 19:23:39,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3271 states. [2020-10-27 19:23:40,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3271 to 3200. [2020-10-27 19:23:40,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3200 states. [2020-10-27 19:23:40,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3200 states to 3200 states and 5484 transitions. [2020-10-27 19:23:40,105 INFO L78 Accepts]: Start accepts. Automaton has 3200 states and 5484 transitions. Word has length 17 [2020-10-27 19:23:40,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:23:40,105 INFO L481 AbstractCegarLoop]: Abstraction has 3200 states and 5484 transitions. [2020-10-27 19:23:40,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:23:40,106 INFO L276 IsEmpty]: Start isEmpty. Operand 3200 states and 5484 transitions. [2020-10-27 19:23:40,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-27 19:23:40,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:23:40,111 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 19:23:40,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:23:40,113 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:23:40,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:23:40,115 INFO L82 PathProgramCache]: Analyzing trace with hash 110325081, now seen corresponding path program 1 times [2020-10-27 19:23:40,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:23:40,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794424923] [2020-10-27 19:23:40,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:23:40,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:23:40,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:23:40,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:23:41,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:23:41,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 19:23:41,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:23:41,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1696 [2020-10-27 19:23:41,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:23:41,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:23:41,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-27 19:23:41,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 19:23:41,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:23:42,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:23:42,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:23:42,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:23:42,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:23:42,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:23:42,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:23:42,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:23:42,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:23:42,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:23:42,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:23:42,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:23:42,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:23:42,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:23:42,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:23:42,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:23:42,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:23:42,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 19:23:42,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:23:42,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-27 19:23:42,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:23:42,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:23:42,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:23:42,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 19:23:42,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:23:42,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:23:42,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794424923] [2020-10-27 19:23:42,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:23:42,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:23:42,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087150336] [2020-10-27 19:23:42,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:23:42,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:23:42,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:23:42,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:23:42,278 INFO L87 Difference]: Start difference. First operand 3200 states and 5484 transitions. Second operand 5 states. [2020-10-27 19:24:22,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:24:22,577 INFO L93 Difference]: Finished difference Result 9248 states and 16041 transitions. [2020-10-27 19:24:22,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:24:22,581 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2020-10-27 19:24:22,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:24:22,621 INFO L225 Difference]: With dead ends: 9248 [2020-10-27 19:24:22,621 INFO L226 Difference]: Without dead ends: 6054 [2020-10-27 19:24:22,632 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 19:24:22,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6054 states. [2020-10-27 19:24:22,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6054 to 6046. [2020-10-27 19:24:22,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6046 states. [2020-10-27 19:24:22,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6046 states to 6046 states and 8818 transitions. [2020-10-27 19:24:22,843 INFO L78 Accepts]: Start accepts. Automaton has 6046 states and 8818 transitions. Word has length 89 [2020-10-27 19:24:22,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:24:22,844 INFO L481 AbstractCegarLoop]: Abstraction has 6046 states and 8818 transitions. [2020-10-27 19:24:22,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:24:22,845 INFO L276 IsEmpty]: Start isEmpty. Operand 6046 states and 8818 transitions. [2020-10-27 19:24:22,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-27 19:24:22,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:24:22,861 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 19:24:22,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:24:22,861 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:24:22,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:24:22,862 INFO L82 PathProgramCache]: Analyzing trace with hash -554068302, now seen corresponding path program 1 times [2020-10-27 19:24:22,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:24:22,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396682034] [2020-10-27 19:24:22,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:24:22,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:24:23,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:24:23,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:24:23,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:24:23,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 19:24:23,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:24:23,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 951 [2020-10-27 19:24:23,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:24:23,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:24:23,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-27 19:24:23,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 19:24:23,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:24:24,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:24:24,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:24:24,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:24:24,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:24:24,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:24:24,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:24:24,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:24:24,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:24:24,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:24:24,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:24:24,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:24:24,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:24:24,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:24:24,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:24:24,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:24:24,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:24:24,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 19:24:24,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:24:24,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-27 19:24:24,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:24:24,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:24:24,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:24:24,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 19:24:24,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:24:24,214 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:24:24,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396682034] [2020-10-27 19:24:24,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:24:24,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:24:24,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916093870] [2020-10-27 19:24:24,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:24:24,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:24:24,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:24:24,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:24:24,220 INFO L87 Difference]: Start difference. First operand 6046 states and 8818 transitions. Second operand 5 states. [2020-10-27 19:24:24,977 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 19:25:16,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:25:16,251 INFO L93 Difference]: Finished difference Result 14970 states and 22283 transitions. [2020-10-27 19:25:16,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:25:16,256 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 98 [2020-10-27 19:25:16,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:25:16,316 INFO L225 Difference]: With dead ends: 14970 [2020-10-27 19:25:16,317 INFO L226 Difference]: Without dead ends: 8930 [2020-10-27 19:25:16,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 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 19:25:16,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8930 states. [2020-10-27 19:25:16,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8930 to 8880. [2020-10-27 19:25:16,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8880 states. [2020-10-27 19:25:16,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8880 states to 8880 states and 12359 transitions. [2020-10-27 19:25:16,597 INFO L78 Accepts]: Start accepts. Automaton has 8880 states and 12359 transitions. Word has length 98 [2020-10-27 19:25:16,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:25:16,598 INFO L481 AbstractCegarLoop]: Abstraction has 8880 states and 12359 transitions. [2020-10-27 19:25:16,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:25:16,599 INFO L276 IsEmpty]: Start isEmpty. Operand 8880 states and 12359 transitions. [2020-10-27 19:25:16,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-27 19:25:16,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:25:16,607 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 19:25:16,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:25:16,609 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:25:16,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:25:16,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1957096605, now seen corresponding path program 1 times [2020-10-27 19:25:16,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:25:16,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680922246] [2020-10-27 19:25:16,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:25:16,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:25:16,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:25:16,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:25:17,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:25:17,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:25:17,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:25:18,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:25:18,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-27 19:25:18,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:25:18,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1514 [2020-10-27 19:25:18,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:25:18,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:25:18,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 96 [2020-10-27 19:25:18,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 19:25:18,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:25:18,338 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 19:25:18,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:25:18,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:25:18,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:25:18,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:25:18,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:25:18,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:25:18,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:25:18,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:25:18,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:25:18,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:25:18,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:25:18,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:25:18,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:25:18,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:25:18,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:25:18,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:25:18,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 19:25:18,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:25:18,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-27 19:25:18,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:25:18,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:25:18,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:25:18,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 19:25:18,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:25:18,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:25:18,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680922246] [2020-10-27 19:25:18,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:25:18,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:25:18,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461319970] [2020-10-27 19:25:18,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:25:18,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:25:18,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:25:18,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:25:18,561 INFO L87 Difference]: Start difference. First operand 8880 states and 12359 transitions. Second operand 5 states. [2020-10-27 19:25:19,557 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 19:26:12,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:26:12,833 INFO L93 Difference]: Finished difference Result 21984 states and 31937 transitions. [2020-10-27 19:26:12,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:26:12,837 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 104 [2020-10-27 19:26:12,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:26:12,911 INFO L225 Difference]: With dead ends: 21984 [2020-10-27 19:26:12,911 INFO L226 Difference]: Without dead ends: 13110 [2020-10-27 19:26:12,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 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 19:26:12,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13110 states. [2020-10-27 19:26:13,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13110 to 13103. [2020-10-27 19:26:13,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13103 states. [2020-10-27 19:26:13,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13103 states to 13103 states and 17333 transitions. [2020-10-27 19:26:13,243 INFO L78 Accepts]: Start accepts. Automaton has 13103 states and 17333 transitions. Word has length 104 [2020-10-27 19:26:13,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:26:13,245 INFO L481 AbstractCegarLoop]: Abstraction has 13103 states and 17333 transitions. [2020-10-27 19:26:13,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:26:13,245 INFO L276 IsEmpty]: Start isEmpty. Operand 13103 states and 17333 transitions. [2020-10-27 19:26:13,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-27 19:26:13,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:26:13,251 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 19:26:13,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 19:26:13,252 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:26:13,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:26:13,252 INFO L82 PathProgramCache]: Analyzing trace with hash -262158430, now seen corresponding path program 1 times [2020-10-27 19:26:13,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:26:13,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [696344097] [2020-10-27 19:26:13,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:26:13,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:26:13,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:26:13,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:26:14,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:26:14,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-27 19:26:14,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:26:14,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1100 [2020-10-27 19:26:14,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:26:14,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:26:14,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 99 [2020-10-27 19:26:14,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 19:26:14,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:26:14,597 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 19:26:14,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:26:14,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:26:14,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:26:14,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:26:14,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:26:14,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:26:14,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:26:14,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:26:14,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:26:14,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:26:14,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:26:14,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:26:14,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:26:14,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:26:14,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:26:14,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:26:14,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 19:26:14,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:26:14,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-27 19:26:14,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:26:14,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:26:14,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:26:14,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-27 19:26:14,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:26:14,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:26:14,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [696344097] [2020-10-27 19:26:14,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:26:14,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 19:26:14,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208635496] [2020-10-27 19:26:14,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:26:14,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:26:14,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:26:14,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:26:14,886 INFO L87 Difference]: Start difference. First operand 13103 states and 17333 transitions. Second operand 6 states. [2020-10-27 19:26:15,051 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 19:26:15,739 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 67