/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label48.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 18:05:52,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 18:05:52,148 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 18:05:52,205 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 18:05:52,206 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 18:05:52,213 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 18:05:52,216 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 18:05:52,220 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 18:05:52,224 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 18:05:52,230 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 18:05:52,232 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 18:05:52,233 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 18:05:52,234 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 18:05:52,237 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 18:05:52,239 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 18:05:52,242 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 18:05:52,243 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 18:05:52,246 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 18:05:52,253 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 18:05:52,276 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 18:05:52,278 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 18:05:52,280 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 18:05:52,281 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 18:05:52,282 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 18:05:52,285 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 18:05:52,285 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 18:05:52,286 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 18:05:52,287 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 18:05:52,287 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 18:05:52,288 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 18:05:52,289 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 18:05:52,290 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 18:05:52,291 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 18:05:52,292 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 18:05:52,293 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 18:05:52,293 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 18:05:52,294 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 18:05:52,294 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 18:05:52,294 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 18:05:52,295 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 18:05:52,296 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 18:05:52,297 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 18:05:52,325 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 18:05:52,325 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 18:05:52,327 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 18:05:52,327 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 18:05:52,327 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 18:05:52,327 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 18:05:52,328 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 18:05:52,328 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 18:05:52,328 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 18:05:52,328 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 18:05:52,329 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 18:05:52,329 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 18:05:52,329 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 18:05:52,329 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 18:05:52,329 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 18:05:52,330 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 18:05:52,330 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 18:05:52,330 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 18:05:52,330 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 18:05:52,331 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 18:05:52,331 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 18:05:52,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:05:52,331 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 18:05:52,332 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 18:05:52,332 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 18:05:52,332 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 18:05:52,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 18:05:52,332 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 18:05:52,333 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 18:05:52,333 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 18:05:52,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 18:05:52,757 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 18:05:52,761 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 18:05:52,762 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 18:05:52,763 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 18:05:52,764 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label48.c [2020-10-27 18:05:52,862 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/36944ffcd/c0cd0821583b436ca86a68b769ead5df/FLAGc5c2ad630 [2020-10-27 18:05:54,101 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 18:05:54,102 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label48.c [2020-10-27 18:05:54,158 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/36944ffcd/c0cd0821583b436ca86a68b769ead5df/FLAGc5c2ad630 [2020-10-27 18:05:54,441 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/36944ffcd/c0cd0821583b436ca86a68b769ead5df [2020-10-27 18:05:54,445 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 18:05:54,452 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 18:05:54,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 18:05:54,455 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 18:05:54,460 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 18:05:54,461 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:05:54" (1/1) ... [2020-10-27 18:05:54,466 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fb0b7e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:05:54, skipping insertion in model container [2020-10-27 18:05:54,466 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:05:54" (1/1) ... [2020-10-27 18:05:54,476 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 18:05:54,687 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 18:05:56,576 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:05:56,587 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 18:05:57,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:05:57,398 INFO L208 MainTranslator]: Completed translation [2020-10-27 18:05:57,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:05:57 WrapperNode [2020-10-27 18:05:57,400 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 18:05:57,401 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 18:05:57,402 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 18:05:57,402 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 18:05:57,418 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:05:57" (1/1) ... [2020-10-27 18:05:57,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:05:57" (1/1) ... [2020-10-27 18:05:57,509 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:05:57" (1/1) ... [2020-10-27 18:05:57,509 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:05:57" (1/1) ... [2020-10-27 18:05:57,780 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:05:57" (1/1) ... [2020-10-27 18:05:57,829 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:05:57" (1/1) ... [2020-10-27 18:05:57,909 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:05:57" (1/1) ... [2020-10-27 18:05:58,045 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 18:05:58,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 18:05:58,049 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 18:05:58,049 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 18:05:58,050 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:05:57" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:05:58,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 18:05:58,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 18:05:58,145 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 18:05:58,146 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 18:05:58,146 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 18:05:58,146 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 18:05:58,147 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 18:05:58,147 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 18:05:58,147 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 18:05:58,147 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 18:05:58,148 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 18:05:58,149 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 18:05:58,149 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 18:05:58,149 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 18:05:58,149 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 18:05:58,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 18:05:58,150 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 18:05:58,151 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 18:05:58,151 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 18:05:58,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 18:05:58,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 18:05:58,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 18:05:58,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 18:05:58,152 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 18:05:58,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 18:06:08,221 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 18:06:08,227 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 18:06:08,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:06:08 BoogieIcfgContainer [2020-10-27 18:06:08,236 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 18:06:08,240 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 18:06:08,243 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 18:06:08,246 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 18:06:08,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:05:54" (1/3) ... [2020-10-27 18:06:08,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27ce55d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:06:08, skipping insertion in model container [2020-10-27 18:06:08,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:05:57" (2/3) ... [2020-10-27 18:06:08,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27ce55d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:06:08, skipping insertion in model container [2020-10-27 18:06:08,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:06:08" (3/3) ... [2020-10-27 18:06:08,250 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label48.c [2020-10-27 18:06:08,264 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 18:06:08,270 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 18:06:08,285 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 18:06:08,323 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 18:06:08,324 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 18:06:08,324 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 18:06:08,324 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 18:06:08,324 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 18:06:08,324 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 18:06:08,325 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 18:06:08,325 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 18:06:08,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-27 18:06:08,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 18:06:08,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:06:08,373 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:06:08,374 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:06:08,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:06:08,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1313769334, now seen corresponding path program 1 times [2020-10-27 18:06:08,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:06:08,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950532853] [2020-10-27 18:06:08,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:06:08,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:06:08,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:06:09,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:06:09,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 18:06:09,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:06:09,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 532 [2020-10-27 18:06:09,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:06:09,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 18:06:09,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:06:09,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 18:06:09,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 18:06:09,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:06:09,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:06:09,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:06:09,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:06:09,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:06:09,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:06:09,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-27 18:06:09,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:06:09,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:06:09,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:06:09,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:06:09,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:06:09,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:06:09,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950532853] [2020-10-27 18:06:09,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 18:06:09,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 18:06:09,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988908866] [2020-10-27 18:06:09,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 18:06:09,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:06:09,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 18:06:09,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 18:06:09,381 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-10-27 18:06:28,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:06:28,385 INFO L93 Difference]: Finished difference Result 3123 states and 5754 transitions. [2020-10-27 18:06:28,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:06:28,387 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-27 18:06:28,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:06:28,433 INFO L225 Difference]: With dead ends: 3123 [2020-10-27 18:06:28,434 INFO L226 Difference]: Without dead ends: 1936 [2020-10-27 18:06:28,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:06:28,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2020-10-27 18:06:28,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1918. [2020-10-27 18:06:28,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1918 states. [2020-10-27 18:06:28,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 2936 transitions. [2020-10-27 18:06:28,653 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 2936 transitions. Word has length 13 [2020-10-27 18:06:28,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:06:28,654 INFO L481 AbstractCegarLoop]: Abstraction has 1918 states and 2936 transitions. [2020-10-27 18:06:28,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 18:06:28,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 2936 transitions. [2020-10-27 18:06:28,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-27 18:06:28,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:06:28,659 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:06:28,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 18:06:28,659 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:06:28,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:06:28,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1026775888, now seen corresponding path program 1 times [2020-10-27 18:06:28,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:06:28,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039736567] [2020-10-27 18:06:28,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:06:28,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:06:28,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:06:29,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:06:30,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:06:30,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:06:30,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 18:06:30,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:06:30,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1581 [2020-10-27 18:06:30,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:06:30,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:06:30,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-27 18:06:30,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 18:06:30,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:06:30,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:06:30,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:06:30,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:06:30,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:06:30,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:06:30,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:06:30,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 18:06:30,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:06:30,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:06:30,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:06:30,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:06:30,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-27 18:06:30,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:06:30,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:06:30,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:06:30,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:06:30,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 18:06:30,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:06:30,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-27 18:06:30,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:06:30,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:06:30,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:06:30,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 18:06:30,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:06:30,727 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:06:30,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039736567] [2020-10-27 18:06:30,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:06:30,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:06:30,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285404510] [2020-10-27 18:06:30,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:06:30,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:06:30,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:06:30,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:06:30,733 INFO L87 Difference]: Start difference. First operand 1918 states and 2936 transitions. Second operand 5 states. [2020-10-27 18:06:50,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:06:50,913 INFO L93 Difference]: Finished difference Result 5547 states and 8580 transitions. [2020-10-27 18:06:50,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:06:50,915 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2020-10-27 18:06:50,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:06:50,937 INFO L225 Difference]: With dead ends: 5547 [2020-10-27 18:06:50,937 INFO L226 Difference]: Without dead ends: 3635 [2020-10-27 18:06:50,944 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 18:06:50,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3635 states. [2020-10-27 18:06:51,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3635 to 3626. [2020-10-27 18:06:51,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3626 states. [2020-10-27 18:06:51,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3626 states to 3626 states and 4935 transitions. [2020-10-27 18:06:51,064 INFO L78 Accepts]: Start accepts. Automaton has 3626 states and 4935 transitions. Word has length 89 [2020-10-27 18:06:51,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:06:51,065 INFO L481 AbstractCegarLoop]: Abstraction has 3626 states and 4935 transitions. [2020-10-27 18:06:51,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:06:51,065 INFO L276 IsEmpty]: Start isEmpty. Operand 3626 states and 4935 transitions. [2020-10-27 18:06:51,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-27 18:06:51,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:06:51,069 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:06:51,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 18:06:51,070 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:06:51,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:06:51,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1147311181, now seen corresponding path program 1 times [2020-10-27 18:06:51,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:06:51,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691405648] [2020-10-27 18:06:51,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:06:51,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:06:51,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:06:51,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:06:52,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:06:52,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-27 18:06:52,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:06:52,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1144 [2020-10-27 18:06:52,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:06:52,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:06:52,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 99 [2020-10-27 18:06:52,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 18:06:52,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:06:52,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:06:52,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:06:52,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:06:52,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:06:52,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:06:52,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:06:52,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:06:52,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:06:52,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:06:52,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:06:52,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:06:52,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:06:52,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:06:52,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:06:52,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:06:52,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:06:52,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 18:06:52,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:06:52,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-27 18:06:52,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:06:52,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:06:52,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:06:52,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-27 18:06:52,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:06:52,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:06:52,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691405648] [2020-10-27 18:06:52,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:06:52,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:06:52,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518462985] [2020-10-27 18:06:52,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:06:52,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:06:52,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:06:52,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:06:52,597 INFO L87 Difference]: Start difference. First operand 3626 states and 4935 transitions. Second operand 5 states. [2020-10-27 18:07:13,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:07:13,045 INFO L93 Difference]: Finished difference Result 10533 states and 14479 transitions. [2020-10-27 18:07:13,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:07:13,048 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 103 [2020-10-27 18:07:13,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:07:13,096 INFO L225 Difference]: With dead ends: 10533 [2020-10-27 18:07:13,096 INFO L226 Difference]: Without dead ends: 6913 [2020-10-27 18:07:13,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:07:13,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6913 states. [2020-10-27 18:07:13,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6913 to 5287. [2020-10-27 18:07:13,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5287 states. [2020-10-27 18:07:13,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5287 states to 5287 states and 7258 transitions. [2020-10-27 18:07:13,334 INFO L78 Accepts]: Start accepts. Automaton has 5287 states and 7258 transitions. Word has length 103 [2020-10-27 18:07:13,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:07:13,336 INFO L481 AbstractCegarLoop]: Abstraction has 5287 states and 7258 transitions. [2020-10-27 18:07:13,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:07:13,336 INFO L276 IsEmpty]: Start isEmpty. Operand 5287 states and 7258 transitions. [2020-10-27 18:07:13,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-27 18:07:13,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:07:13,351 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:07:13,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 18:07:13,353 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:07:13,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:07:13,353 INFO L82 PathProgramCache]: Analyzing trace with hash 260150773, now seen corresponding path program 1 times [2020-10-27 18:07:13,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:07:13,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996734539] [2020-10-27 18:07:13,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:07:13,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:07:13,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:07:13,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:07:14,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:07:15,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:07:15,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-27 18:07:15,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:07:15,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1645 [2020-10-27 18:07:15,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:07:15,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:07:15,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 103 [2020-10-27 18:07:15,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 18:07:15,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:07:15,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:07:15,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:07:15,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:07:15,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:07:15,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:07:15,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:07:15,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 18:07:15,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:07:15,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:07:15,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:07:15,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:07:15,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:07:15,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:07:15,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:07:15,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:07:15,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:07:15,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 18:07:15,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:07:15,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-27 18:07:15,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:07:15,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:07:15,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:07:15,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 18:07:15,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:07:15,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:07:15,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996734539] [2020-10-27 18:07:15,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:07:15,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:07:15,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371363516] [2020-10-27 18:07:15,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:07:15,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:07:15,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:07:15,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:07:15,486 INFO L87 Difference]: Start difference. First operand 5287 states and 7258 transitions. Second operand 5 states. [2020-10-27 18:07:41,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:07:41,301 INFO L93 Difference]: Finished difference Result 15481 states and 21647 transitions. [2020-10-27 18:07:41,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:07:41,305 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 106 [2020-10-27 18:07:41,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:07:41,372 INFO L225 Difference]: With dead ends: 15481 [2020-10-27 18:07:41,372 INFO L226 Difference]: Without dead ends: 10200 [2020-10-27 18:07:41,393 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 18:07:41,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10200 states. [2020-10-27 18:07:41,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10200 to 10193. [2020-10-27 18:07:41,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10193 states. [2020-10-27 18:07:41,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10193 states to 10193 states and 13361 transitions. [2020-10-27 18:07:41,706 INFO L78 Accepts]: Start accepts. Automaton has 10193 states and 13361 transitions. Word has length 106 [2020-10-27 18:07:41,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:07:41,706 INFO L481 AbstractCegarLoop]: Abstraction has 10193 states and 13361 transitions. [2020-10-27 18:07:41,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:07:41,707 INFO L276 IsEmpty]: Start isEmpty. Operand 10193 states and 13361 transitions. [2020-10-27 18:07:41,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-27 18:07:41,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:07:41,710 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:07:41,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 18:07:41,711 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:07:41,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:07:41,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1620619034, now seen corresponding path program 1 times [2020-10-27 18:07:41,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:07:41,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562919335] [2020-10-27 18:07:41,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:07:41,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:07:41,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:07:41,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:07:42,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:07:43,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:07:45,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:07:45,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-27 18:07:45,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:07:45,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4046 [2020-10-27 18:07:45,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:07:45,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:07:45,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 180 [2020-10-27 18:07:45,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 18:07:45,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:07:45,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:07:45,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:07:45,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:07:45,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:07:45,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:07:45,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:07:45,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:07:45,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:07:45,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:07:45,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:07:45,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:07:45,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:07:46,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:07:46,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:07:46,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:07:46,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:07:46,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 18:07:46,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:07:46,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-27 18:07:46,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:07:46,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:07:46,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:07:46,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:07:46,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:07:46,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-27 18:07:46,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:07:46,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:07:46,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:07:46,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 18:07:46,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:07:46,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-27 18:07:46,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:07:46,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:07:46,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:07:46,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 18:07:46,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:07:46,446 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-27 18:07:46,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562919335] [2020-10-27 18:07:46,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:07:46,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:07:46,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917119581] [2020-10-27 18:07:46,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:07:46,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:07:46,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:07:46,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:07:46,456 INFO L87 Difference]: Start difference. First operand 10193 states and 13361 transitions. Second operand 5 states. [2020-10-27 18:07:47,455 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 18:08:15,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:08:15,292 INFO L93 Difference]: Finished difference Result 25299 states and 34517 transitions. [2020-10-27 18:08:15,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:08:15,294 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 181 [2020-10-27 18:08:15,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:08:15,405 INFO L225 Difference]: With dead ends: 25299 [2020-10-27 18:08:15,405 INFO L226 Difference]: Without dead ends: 15112 [2020-10-27 18:08:15,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 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 18:08:15,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15112 states. [2020-10-27 18:08:15,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15112 to 15082. [2020-10-27 18:08:15,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15082 states. [2020-10-27 18:08:15,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15082 states to 15082 states and 19354 transitions. [2020-10-27 18:08:15,922 INFO L78 Accepts]: Start accepts. Automaton has 15082 states and 19354 transitions. Word has length 181 [2020-10-27 18:08:15,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:08:15,923 INFO L481 AbstractCegarLoop]: Abstraction has 15082 states and 19354 transitions. [2020-10-27 18:08:15,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:08:15,923 INFO L276 IsEmpty]: Start isEmpty. Operand 15082 states and 19354 transitions. [2020-10-27 18:08:15,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-10-27 18:08:15,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:08:15,934 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:08:15,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 18:08:15,934 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:08:15,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:08:15,935 INFO L82 PathProgramCache]: Analyzing trace with hash 232970983, now seen corresponding path program 1 times [2020-10-27 18:08:15,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:08:15,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235428810] [2020-10-27 18:08:15,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:08:15,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:08:16,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:08:16,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:08:16,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:08:17,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:08:17,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:08:18,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:08:20,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:08:20,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 202 [2020-10-27 18:08:21,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 18:08:21,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 18:08:21,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:08:21,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:08:21,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 186 [2020-10-27 18:08:21,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 18:08:21,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:08:21,188 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:08:21,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:08:21,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:08:21,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:08:21,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:08:21,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:08:21,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:08:21,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 18:08:21,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:08:21,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:08:21,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:08:21,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:08:21,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:08:21,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:08:21,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:08:21,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:08:21,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:08:21,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 18:08:21,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:08:21,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-27 18:08:21,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:08:21,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:08:21,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:08:21,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:08:21,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:08:21,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-27 18:08:21,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:08:21,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:08:21,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:08:21,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:08:21,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 18:08:21,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:08:21,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 265 [2020-10-27 18:08:21,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:08:21,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:08:21,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-27 18:08:21,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:08:21,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:08:21,742 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-27 18:08:21,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235428810] [2020-10-27 18:08:21,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:08:21,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 18:08:21,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006795868] [2020-10-27 18:08:21,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 18:08:21,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:08:21,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 18:08:21,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:08:21,751 INFO L87 Difference]: Start difference. First operand 15082 states and 19354 transitions. Second operand 6 states. [2020-10-27 18:08:22,792 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 18:08:24,422 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 18:08:26,746 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 18:09:20,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:09:20,413 INFO L93 Difference]: Finished difference Result 61989 states and 85506 transitions. [2020-10-27 18:09:20,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 18:09:20,417 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 188 [2020-10-27 18:09:20,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:09:20,681 INFO L225 Difference]: With dead ends: 61989 [2020-10-27 18:09:20,681 INFO L226 Difference]: Without dead ends: 46913 [2020-10-27 18:09:20,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-27 18:09:20,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46913 states. [2020-10-27 18:09:21,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46913 to 46830. [2020-10-27 18:09:21,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46830 states. [2020-10-27 18:09:22,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46830 states to 46830 states and 60471 transitions. [2020-10-27 18:09:22,070 INFO L78 Accepts]: Start accepts. Automaton has 46830 states and 60471 transitions. Word has length 188 [2020-10-27 18:09:22,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:09:22,071 INFO L481 AbstractCegarLoop]: Abstraction has 46830 states and 60471 transitions. [2020-10-27 18:09:22,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 18:09:22,071 INFO L276 IsEmpty]: Start isEmpty. Operand 46830 states and 60471 transitions. [2020-10-27 18:09:22,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-10-27 18:09:22,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:09:22,080 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:09:22,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 18:09:22,080 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:09:22,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:09:22,081 INFO L82 PathProgramCache]: Analyzing trace with hash 2114938112, now seen corresponding path program 1 times [2020-10-27 18:09:22,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:09:22,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201333318] [2020-10-27 18:09:22,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:09:22,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:09:22,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:09:22,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:09:24,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:09:24,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 218 [2020-10-27 18:09:24,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:09:24,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2116 [2020-10-27 18:09:24,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:09:24,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:09:24,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 203 [2020-10-27 18:09:24,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 18:09:24,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:09:24,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:09:24,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:09:24,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:09:24,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:09:24,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:09:24,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:09:24,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:09:24,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:09:24,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:09:24,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:09:24,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:09:24,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:09:24,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:09:24,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:09:24,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:09:24,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:09:24,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-27 18:09:24,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:09:24,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-27 18:09:24,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:09:24,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:09:24,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:09:24,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 188 [2020-10-27 18:09:24,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:09:24,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:09:24,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201333318] [2020-10-27 18:09:24,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:09:24,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:09:24,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508146183] [2020-10-27 18:09:24,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:09:24,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:09:24,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:09:24,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:09:24,870 INFO L87 Difference]: Start difference. First operand 46830 states and 60471 transitions. Second operand 5 states. [2020-10-27 18:09:26,228 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 66