/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_label47.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:31:13,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:31:13,190 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:31:13,234 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:31:13,235 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:31:13,236 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:31:13,238 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:31:13,241 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:31:13,243 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:31:13,245 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:31:13,246 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:31:13,248 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:31:13,248 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:31:13,249 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:31:13,251 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:31:13,252 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:31:13,253 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:31:13,254 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:31:13,257 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:31:13,260 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:31:13,262 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:31:13,263 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:31:13,265 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:31:13,266 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:31:13,269 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:31:13,270 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:31:13,270 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:31:13,272 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:31:13,273 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:31:13,274 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:31:13,274 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:31:13,276 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:31:13,277 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:31:13,278 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:31:13,279 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:31:13,279 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:31:13,280 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:31:13,281 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:31:13,281 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:31:13,282 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:31:13,283 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:31:13,289 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 19:31:13,317 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:31:13,317 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:31:13,319 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:31:13,319 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:31:13,319 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:31:13,320 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:31:13,320 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:31:13,320 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:31:13,320 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:31:13,321 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:31:13,321 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:31:13,321 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:31:13,322 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:31:13,322 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:31:13,322 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:31:13,322 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:31:13,322 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:31:13,323 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:31:13,323 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:31:13,323 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:31:13,324 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:31:13,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:31:13,324 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:31:13,324 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:31:13,325 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:31:13,325 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:31:13,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:31:13,325 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:31:13,326 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:31:13,326 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:31:13,715 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:31:13,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:31:13,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:31:13,749 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:31:13,749 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:31:13,750 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label47.c [2020-10-27 19:31:13,837 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/16586ce04/bf8e0b245ab34ea4a4b5cada73f91a30/FLAG257423b17 [2020-10-27 19:31:15,142 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:31:15,143 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label47.c [2020-10-27 19:31:15,238 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/16586ce04/bf8e0b245ab34ea4a4b5cada73f91a30/FLAG257423b17 [2020-10-27 19:31:15,399 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/16586ce04/bf8e0b245ab34ea4a4b5cada73f91a30 [2020-10-27 19:31:15,406 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:31:15,421 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:31:15,425 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:31:15,425 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:31:15,430 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:31:15,431 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:31:15" (1/1) ... [2020-10-27 19:31:15,438 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15c55310 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:31:15, skipping insertion in model container [2020-10-27 19:31:15,438 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:31:15" (1/1) ... [2020-10-27 19:31:15,448 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:31:15,720 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:31:17,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:31:18,008 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:31:19,147 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:31:19,214 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:31:19,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:31:19 WrapperNode [2020-10-27 19:31:19,215 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:31:19,216 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:31:19,217 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:31:19,217 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:31:19,233 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:31:19" (1/1) ... [2020-10-27 19:31:19,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:31:19" (1/1) ... [2020-10-27 19:31:19,339 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:31:19" (1/1) ... [2020-10-27 19:31:19,340 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:31:19" (1/1) ... [2020-10-27 19:31:19,640 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:31:19" (1/1) ... [2020-10-27 19:31:19,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:31:19" (1/1) ... [2020-10-27 19:31:19,749 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:31:19" (1/1) ... [2020-10-27 19:31:19,995 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:31:19,996 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:31:19,996 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:31:19,997 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:31:19,997 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:31:19" (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 19:31:20,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:31:20,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:31:20,206 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:31:20,206 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 19:31:20,206 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 19:31:20,207 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 19:31:20,207 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 19:31:20,207 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 19:31:20,207 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 19:31:20,207 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:31:20,208 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 19:31:20,208 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 19:31:20,209 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 19:31:20,209 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 19:31:20,209 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 19:31:20,211 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 19:31:20,211 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:31:20,211 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:31:20,211 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:31:20,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:31:20,212 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 19:31:20,212 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 19:31:20,212 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:31:20,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:31:20,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:31:20,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:31:20,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:31:20,213 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:31:20,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:31:35,232 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:31:35,233 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 19:31:35,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:31:35 BoogieIcfgContainer [2020-10-27 19:31:35,238 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:31:35,240 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:31:35,241 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:31:35,245 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:31:35,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:31:15" (1/3) ... [2020-10-27 19:31:35,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3665d41d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:31:35, skipping insertion in model container [2020-10-27 19:31:35,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:31:19" (2/3) ... [2020-10-27 19:31:35,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3665d41d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:31:35, skipping insertion in model container [2020-10-27 19:31:35,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:31:35" (3/3) ... [2020-10-27 19:31:35,248 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label47.c [2020-10-27 19:31:35,262 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:31:35,269 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:31:35,284 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:31:35,325 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:31:35,325 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:31:35,325 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:31:35,325 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:31:35,326 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:31:35,326 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:31:35,326 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:31:35,326 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:31:35,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-27 19:31:35,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 19:31:35,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:31:35,385 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:31:35,385 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:31:35,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:31:35,392 INFO L82 PathProgramCache]: Analyzing trace with hash -425370282, now seen corresponding path program 1 times [2020-10-27 19:31:35,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:31:35,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146401080] [2020-10-27 19:31:35,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:31:35,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:31:35,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:31:36,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:31:36,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 19:31:36,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:31:36,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 544 [2020-10-27 19:31:36,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:31:36,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:31:36,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:31:36,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 19:31:36,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 19:31:36,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:31:36,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:31:36,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:31:36,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:31:36,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:31:36,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:31:36,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-27 19:31:36,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:31:36,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:31:36,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:31:36,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:31:36,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:31:36,445 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 19:31:36,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146401080] [2020-10-27 19:31:36,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:31:36,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 19:31:36,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483934691] [2020-10-27 19:31:36,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:31:36,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:31:36,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:31:36,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:31:36,483 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-27 19:32:07,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:32:07,459 INFO L93 Difference]: Finished difference Result 5116 states and 9607 transitions. [2020-10-27 19:32:07,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:32:07,462 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-27 19:32:07,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:32:07,509 INFO L225 Difference]: With dead ends: 5116 [2020-10-27 19:32:07,509 INFO L226 Difference]: Without dead ends: 3271 [2020-10-27 19:32:07,523 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 19:32:07,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3271 states. [2020-10-27 19:32:07,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3271 to 3200. [2020-10-27 19:32:07,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3200 states. [2020-10-27 19:32:07,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3200 states to 3200 states and 5484 transitions. [2020-10-27 19:32:07,721 INFO L78 Accepts]: Start accepts. Automaton has 3200 states and 5484 transitions. Word has length 15 [2020-10-27 19:32:07,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:32:07,722 INFO L481 AbstractCegarLoop]: Abstraction has 3200 states and 5484 transitions. [2020-10-27 19:32:07,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:32:07,722 INFO L276 IsEmpty]: Start isEmpty. Operand 3200 states and 5484 transitions. [2020-10-27 19:32:07,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 19:32:07,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:32:07,726 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:32:07,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:32:07,727 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:32:07,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:32:07,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1133872623, now seen corresponding path program 1 times [2020-10-27 19:32:07,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:32:07,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572687596] [2020-10-27 19:32:07,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:32:07,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:32:07,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:32:08,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:32:09,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:32:09,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 19:32:09,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:32:09,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1477 [2020-10-27 19:32:09,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:32:09,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:32:09,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-27 19:32:09,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 19:32:09,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 19:32:09,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:32:09,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:32:09,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:32:09,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:32:09,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:32:09,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:32:09,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 19:32:09,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:32:09,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:32:09,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:32:09,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:32:09,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 19:32:09,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:32:09,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:32:09,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:32:09,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:32:09,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 19:32:09,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:32:09,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-27 19:32:09,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:32:09,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:32:09,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:32:09,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 19:32:09,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:32:09,672 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:32:09,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572687596] [2020-10-27 19:32:09,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:32:09,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:32:09,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734029685] [2020-10-27 19:32:09,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:32:09,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:32:09,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:32:09,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:32:09,678 INFO L87 Difference]: Start difference. First operand 3200 states and 5484 transitions. Second operand 5 states. [2020-10-27 19:32:46,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:32:46,935 INFO L93 Difference]: Finished difference Result 9248 states and 16041 transitions. [2020-10-27 19:32:46,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:32:46,938 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 87 [2020-10-27 19:32:46,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:32:46,973 INFO L225 Difference]: With dead ends: 9248 [2020-10-27 19:32:46,973 INFO L226 Difference]: Without dead ends: 6054 [2020-10-27 19:32:46,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 2 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 19:32:46,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6054 states. [2020-10-27 19:32:47,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6054 to 6046. [2020-10-27 19:32:47,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6046 states. [2020-10-27 19:32:47,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6046 states to 6046 states and 8818 transitions. [2020-10-27 19:32:47,149 INFO L78 Accepts]: Start accepts. Automaton has 6046 states and 8818 transitions. Word has length 87 [2020-10-27 19:32:47,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:32:47,150 INFO L481 AbstractCegarLoop]: Abstraction has 6046 states and 8818 transitions. [2020-10-27 19:32:47,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:32:47,151 INFO L276 IsEmpty]: Start isEmpty. Operand 6046 states and 8818 transitions. [2020-10-27 19:32:47,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-27 19:32:47,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:32:47,156 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:32:47,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:32:47,156 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:32:47,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:32:47,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1143552490, now seen corresponding path program 1 times [2020-10-27 19:32:47,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:32:47,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149809845] [2020-10-27 19:32:47,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:32:47,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:32:47,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:32:47,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:32:47,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:32:47,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-27 19:32:47,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:32:47,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 752 [2020-10-27 19:32:47,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:32:47,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:32:47,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-27 19:32:47,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 19:32:47,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:32:48,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:32:48,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:32:48,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:32:48,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:32:48,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:32:48,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:32:48,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 19:32:48,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:32:48,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:32:48,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:32:48,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:32:48,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:32:48,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:32:48,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:32:48,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:32:48,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:32:48,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 19:32:48,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:32:48,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-27 19:32:48,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:32:48,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:32:48,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:32:48,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 19:32:48,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:32:48,358 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:32:48,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149809845] [2020-10-27 19:32:48,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:32:48,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:32:48,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224355213] [2020-10-27 19:32:48,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:32:48,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:32:48,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:32:48,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:32:48,364 INFO L87 Difference]: Start difference. First operand 6046 states and 8818 transitions. Second operand 5 states. [2020-10-27 19:32:49,299 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 19:33:41,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:33:41,863 INFO L93 Difference]: Finished difference Result 14970 states and 22283 transitions. [2020-10-27 19:33:41,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:33:41,866 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 96 [2020-10-27 19:33:41,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:33:41,934 INFO L225 Difference]: With dead ends: 14970 [2020-10-27 19:33:41,934 INFO L226 Difference]: Without dead ends: 8930 [2020-10-27 19:33:41,953 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 19:33:41,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8930 states. [2020-10-27 19:33:42,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8930 to 8880. [2020-10-27 19:33:42,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8880 states. [2020-10-27 19:33:42,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8880 states to 8880 states and 12359 transitions. [2020-10-27 19:33:42,313 INFO L78 Accepts]: Start accepts. Automaton has 8880 states and 12359 transitions. Word has length 96 [2020-10-27 19:33:42,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:33:42,315 INFO L481 AbstractCegarLoop]: Abstraction has 8880 states and 12359 transitions. [2020-10-27 19:33:42,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:33:42,322 INFO L276 IsEmpty]: Start isEmpty. Operand 8880 states and 12359 transitions. [2020-10-27 19:33:42,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-27 19:33:42,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:33:42,335 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:33:42,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:33:42,336 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:33:42,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:33:42,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1334864165, now seen corresponding path program 1 times [2020-10-27 19:33:42,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:33:42,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943501686] [2020-10-27 19:33:42,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:33:42,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:33:42,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:33:42,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:33:42,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:33:42,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:33:43,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:33:43,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:33:43,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-27 19:33:43,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:33:43,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1296 [2020-10-27 19:33:43,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:33:43,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:33:43,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 96 [2020-10-27 19:33:43,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 19:33:43,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:33:43,920 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 19:33:43,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:33:43,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:33:43,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:33:43,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:33:43,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:33:43,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:33:43,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 19:33:43,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:33:43,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:33:43,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:33:43,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:33:43,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:33:43,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:33:44,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:33:44,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:33:44,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:33:44,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 19:33:44,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:33:44,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-27 19:33:44,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:33:44,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:33:44,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:33:44,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 19:33:44,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:33:44,202 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:33:44,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943501686] [2020-10-27 19:33:44,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:33:44,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:33:44,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534690728] [2020-10-27 19:33:44,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:33:44,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:33:44,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:33:44,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:33:44,206 INFO L87 Difference]: Start difference. First operand 8880 states and 12359 transitions. Second operand 5 states. [2020-10-27 19:33:45,295 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 19:34:52,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:34:52,482 INFO L93 Difference]: Finished difference Result 21984 states and 31937 transitions. [2020-10-27 19:34:52,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:34:52,487 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 102 [2020-10-27 19:34:52,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:34:52,567 INFO L225 Difference]: With dead ends: 21984 [2020-10-27 19:34:52,567 INFO L226 Difference]: Without dead ends: 13110 [2020-10-27 19:34:52,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 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 19:34:52,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13110 states. [2020-10-27 19:34:52,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13110 to 13103. [2020-10-27 19:34:52,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13103 states. [2020-10-27 19:34:52,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13103 states to 13103 states and 17333 transitions. [2020-10-27 19:34:52,985 INFO L78 Accepts]: Start accepts. Automaton has 13103 states and 17333 transitions. Word has length 102 [2020-10-27 19:34:52,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:34:52,987 INFO L481 AbstractCegarLoop]: Abstraction has 13103 states and 17333 transitions. [2020-10-27 19:34:52,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:34:52,987 INFO L276 IsEmpty]: Start isEmpty. Operand 13103 states and 17333 transitions. [2020-10-27 19:34:52,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-27 19:34:53,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:34:53,000 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:34:53,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 19:34:53,000 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:34:53,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:34:53,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1537055386, now seen corresponding path program 1 times [2020-10-27 19:34:53,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:34:53,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933940141] [2020-10-27 19:34:53,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:34:53,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:34:53,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:34:53,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:34:54,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:34:54,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 19:34:54,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:34:54,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1048 [2020-10-27 19:34:54,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:34:54,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:34:54,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 99 [2020-10-27 19:34:54,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 19:34:54,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:34:54,258 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 19:34:54,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:34:54,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:34:54,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:34:54,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:34:54,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:34:54,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:34:54,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:34:54,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:34:54,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:34:54,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:34:54,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:34:54,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:34:54,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:34:54,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:34:54,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:34:54,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:34:54,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 19:34:54,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:34:54,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-27 19:34:54,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:34:54,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:34:54,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:34:54,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-27 19:34:54,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:34:54,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:34:54,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933940141] [2020-10-27 19:34:54,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:34:54,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:34:54,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884932074] [2020-10-27 19:34:54,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:34:54,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:34:54,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:34:54,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:34:54,501 INFO L87 Difference]: Start difference. First operand 13103 states and 17333 transitions. Second operand 5 states. [2020-10-27 19:34:54,660 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 66