/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=SHALLOWEST --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_label45.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 23:14:58,367 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 23:14:58,370 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 23:14:58,425 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 23:14:58,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 23:14:58,434 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 23:14:58,437 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 23:14:58,442 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 23:14:58,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 23:14:58,453 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 23:14:58,454 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 23:14:58,456 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 23:14:58,457 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 23:14:58,461 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 23:14:58,465 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 23:14:58,468 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 23:14:58,469 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 23:14:58,472 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 23:14:58,480 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 23:14:58,488 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 23:14:58,491 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 23:14:58,493 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 23:14:58,494 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 23:14:58,497 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 23:14:58,506 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 23:14:58,506 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 23:14:58,506 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 23:14:58,510 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 23:14:58,511 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 23:14:58,512 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 23:14:58,512 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 23:14:58,513 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 23:14:58,515 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 23:14:58,516 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 23:14:58,518 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 23:14:58,518 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 23:14:58,519 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 23:14:58,519 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 23:14:58,519 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 23:14:58,520 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 23:14:58,521 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 23:14:58,525 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 [2020-10-26 23:14:58,567 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 23:14:58,567 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 23:14:58,571 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 23:14:58,572 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 23:14:58,572 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 23:14:58,572 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 23:14:58,573 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 23:14:58,573 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 23:14:58,573 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 23:14:58,573 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 23:14:58,575 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 23:14:58,575 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 23:14:58,575 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 23:14:58,576 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 23:14:58,576 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 23:14:58,576 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 23:14:58,576 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 23:14:58,576 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 23:14:58,577 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 23:14:58,577 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 23:14:58,577 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 23:14:58,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:14:58,578 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 23:14:58,578 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 23:14:58,578 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 23:14:58,578 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 23:14:58,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 23:14:58,579 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 23:14:58,579 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 23:14:58,579 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 23:14:59,010 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 23:14:59,050 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 23:14:59,054 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 23:14:59,055 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 23:14:59,056 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 23:14:59,058 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label45.c [2020-10-26 23:14:59,151 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bf1511ae4/1d77452ea89f4c7e8850a757b3cc7b43/FLAGca99ea6ee [2020-10-26 23:15:00,250 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 23:15:00,251 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label45.c [2020-10-26 23:15:00,287 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bf1511ae4/1d77452ea89f4c7e8850a757b3cc7b43/FLAGca99ea6ee [2020-10-26 23:15:00,760 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bf1511ae4/1d77452ea89f4c7e8850a757b3cc7b43 [2020-10-26 23:15:00,763 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 23:15:00,770 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 23:15:00,772 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 23:15:00,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 23:15:00,781 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 23:15:00,783 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:15:00" (1/1) ... [2020-10-26 23:15:00,787 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c74a02b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:15:00, skipping insertion in model container [2020-10-26 23:15:00,788 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:15:00" (1/1) ... [2020-10-26 23:15:00,797 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 23:15:01,033 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 23:15:02,781 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:15:02,800 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 23:15:03,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:15:03,705 INFO L208 MainTranslator]: Completed translation [2020-10-26 23:15:03,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:15:03 WrapperNode [2020-10-26 23:15:03,707 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 23:15:03,708 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 23:15:03,708 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 23:15:03,708 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 23:15:03,723 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:15:03" (1/1) ... [2020-10-26 23:15:03,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:15:03" (1/1) ... [2020-10-26 23:15:03,840 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:15:03" (1/1) ... [2020-10-26 23:15:03,841 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:15:03" (1/1) ... [2020-10-26 23:15:04,033 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:15:03" (1/1) ... [2020-10-26 23:15:04,069 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:15:03" (1/1) ... [2020-10-26 23:15:04,113 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:15:03" (1/1) ... [2020-10-26 23:15:04,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 23:15:04,156 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 23:15:04,156 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 23:15:04,156 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 23:15:04,157 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:15:03" (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 [2020-10-26 23:15:04,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 23:15:04,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 23:15:04,244 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 23:15:04,245 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 23:15:04,245 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 23:15:04,245 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 23:15:04,245 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 23:15:04,245 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 23:15:04,245 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 23:15:04,246 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 23:15:04,246 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 23:15:04,246 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 23:15:04,246 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 23:15:04,246 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 23:15:04,246 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 23:15:04,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 23:15:04,247 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 23:15:04,247 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 23:15:04,247 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 23:15:04,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 23:15:04,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 23:15:04,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 23:15:04,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 23:15:04,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 23:15:04,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 23:15:14,279 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 23:15:14,280 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 23:15:14,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:15:14 BoogieIcfgContainer [2020-10-26 23:15:14,284 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 23:15:14,286 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 23:15:14,287 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 23:15:14,291 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 23:15:14,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:15:00" (1/3) ... [2020-10-26 23:15:14,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12a00169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:15:14, skipping insertion in model container [2020-10-26 23:15:14,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:15:03" (2/3) ... [2020-10-26 23:15:14,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12a00169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:15:14, skipping insertion in model container [2020-10-26 23:15:14,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:15:14" (3/3) ... [2020-10-26 23:15:14,295 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label45.c [2020-10-26 23:15:14,312 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 23:15:14,319 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 23:15:14,336 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 23:15:14,395 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 23:15:14,396 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 23:15:14,396 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 23:15:14,396 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 23:15:14,396 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 23:15:14,396 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 23:15:14,396 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 23:15:14,397 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 23:15:14,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-26 23:15:14,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-26 23:15:14,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:15:14,460 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:15:14,461 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:15:14,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:15:14,471 INFO L82 PathProgramCache]: Analyzing trace with hash -2073438374, now seen corresponding path program 1 times [2020-10-26 23:15:14,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:15:14,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414722999] [2020-10-26 23:15:14,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:15:14,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:15:14,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:15,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:15:15,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-26 23:15:15,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:15:15,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 515 [2020-10-26 23:15:15,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:15:15,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:15:15,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:15:15,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 23:15:15,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:15:15,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:15:15,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:15:15,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:15,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:15:15,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:15:15,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:15:15,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-26 23:15:15,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:15:15,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:15:15,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:15:15,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:15:15,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:15:15,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:15:15,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414722999] [2020-10-26 23:15:15,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:15:15,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 23:15:15,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924300174] [2020-10-26 23:15:15,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 23:15:15,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:15:15,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 23:15:15,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 23:15:15,543 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-10-26 23:15:32,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:15:32,298 INFO L93 Difference]: Finished difference Result 3157 states and 5837 transitions. [2020-10-26 23:15:32,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:15:32,301 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-26 23:15:32,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:15:32,342 INFO L225 Difference]: With dead ends: 3157 [2020-10-26 23:15:32,342 INFO L226 Difference]: Without dead ends: 1955 [2020-10-26 23:15:32,355 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 [2020-10-26 23:15:32,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1955 states. [2020-10-26 23:15:32,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1955 to 1886. [2020-10-26 23:15:32,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1886 states. [2020-10-26 23:15:32,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 3104 transitions. [2020-10-26 23:15:32,561 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 3104 transitions. Word has length 14 [2020-10-26 23:15:32,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:15:32,561 INFO L481 AbstractCegarLoop]: Abstraction has 1886 states and 3104 transitions. [2020-10-26 23:15:32,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 23:15:32,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 3104 transitions. [2020-10-26 23:15:32,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-26 23:15:32,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:15:32,569 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 23:15:32,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 23:15:32,569 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:15:32,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:15:32,571 INFO L82 PathProgramCache]: Analyzing trace with hash -2020870712, now seen corresponding path program 1 times [2020-10-26 23:15:32,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:15:32,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800597964] [2020-10-26 23:15:32,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:15:32,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:15:32,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:33,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:33,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:15:33,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 23:15:33,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:15:33,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1276 [2020-10-26 23:15:33,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:15:33,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:15:33,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:15:33,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 23:15:33,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 23:15:34,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:15:34,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:15:34,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:34,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:15:34,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:15:34,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:15:34,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-26 23:15:34,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:15:34,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:15:34,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:15:34,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:15:34,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:15:34,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:15:34,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:15:34,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:15:34,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:15:34,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 23:15:34,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:15:34,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-26 23:15:34,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:15:34,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:15:34,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:15:34,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-26 23:15:34,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:15:34,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:15:34,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800597964] [2020-10-26 23:15:34,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:15:34,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-26 23:15:34,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711606332] [2020-10-26 23:15:34,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:15:34,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:15:34,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:15:34,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:15:34,507 INFO L87 Difference]: Start difference. First operand 1886 states and 3104 transitions. Second operand 8 states. [2020-10-26 23:16:13,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:16:13,224 INFO L93 Difference]: Finished difference Result 7280 states and 12097 transitions. [2020-10-26 23:16:13,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 23:16:13,227 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 84 [2020-10-26 23:16:13,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:16:13,273 INFO L225 Difference]: With dead ends: 7280 [2020-10-26 23:16:13,273 INFO L226 Difference]: Without dead ends: 5400 [2020-10-26 23:16:13,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-10-26 23:16:13,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5400 states. [2020-10-26 23:16:13,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5400 to 5330. [2020-10-26 23:16:13,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5330 states. [2020-10-26 23:16:13,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5330 states to 5330 states and 7805 transitions. [2020-10-26 23:16:13,638 INFO L78 Accepts]: Start accepts. Automaton has 5330 states and 7805 transitions. Word has length 84 [2020-10-26 23:16:13,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:16:13,639 INFO L481 AbstractCegarLoop]: Abstraction has 5330 states and 7805 transitions. [2020-10-26 23:16:13,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:16:13,640 INFO L276 IsEmpty]: Start isEmpty. Operand 5330 states and 7805 transitions. [2020-10-26 23:16:13,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-26 23:16:13,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:16:13,646 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 23:16:13,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 23:16:13,647 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:16:13,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:16:13,648 INFO L82 PathProgramCache]: Analyzing trace with hash -439178414, now seen corresponding path program 1 times [2020-10-26 23:16:13,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:16:13,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829440197] [2020-10-26 23:16:13,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:16:13,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:16:13,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:16:14,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:16:14,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 23:16:14,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:16:14,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 473 [2020-10-26 23:16:14,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:16:14,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:16:14,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:16:14,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 23:16:14,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:16:14,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:16:14,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:16:14,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:16:14,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:16:14,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:16:14,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:16:14,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 23:16:14,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:16:14,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:16:14,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:16:14,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:16:14,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:16:14,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:16:14,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:16:14,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:16:14,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:16:14,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 23:16:14,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:16:14,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 214 [2020-10-26 23:16:14,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:16:14,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:16:14,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:16:14,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 23:16:14,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:16:14,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:16:14,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829440197] [2020-10-26 23:16:14,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:16:14,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:16:14,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979035401] [2020-10-26 23:16:14,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:16:14,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:16:14,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:16:14,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:16:14,764 INFO L87 Difference]: Start difference. First operand 5330 states and 7805 transitions. Second operand 7 states. [2020-10-26 23:16:47,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:16:47,811 INFO L93 Difference]: Finished difference Result 15971 states and 23902 transitions. [2020-10-26 23:16:47,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:16:47,813 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 89 [2020-10-26 23:16:47,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:16:47,887 INFO L225 Difference]: With dead ends: 15971 [2020-10-26 23:16:47,888 INFO L226 Difference]: Without dead ends: 10647 [2020-10-26 23:16:47,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:16:47,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10647 states. [2020-10-26 23:16:48,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10647 to 10420. [2020-10-26 23:16:48,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10420 states. [2020-10-26 23:16:48,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10420 states to 10420 states and 14290 transitions. [2020-10-26 23:16:48,247 INFO L78 Accepts]: Start accepts. Automaton has 10420 states and 14290 transitions. Word has length 89 [2020-10-26 23:16:48,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:16:48,247 INFO L481 AbstractCegarLoop]: Abstraction has 10420 states and 14290 transitions. [2020-10-26 23:16:48,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:16:48,248 INFO L276 IsEmpty]: Start isEmpty. Operand 10420 states and 14290 transitions. [2020-10-26 23:16:48,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-26 23:16:48,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:16:48,251 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:16:48,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 23:16:48,252 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:16:48,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:16:48,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1941758210, now seen corresponding path program 1 times [2020-10-26 23:16:48,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:16:48,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263520596] [2020-10-26 23:16:48,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:16:48,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:16:48,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:16:48,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:16:50,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:16:50,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-26 23:16:50,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:16:50,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1867 [2020-10-26 23:16:50,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:16:50,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:16:50,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:16:50,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-26 23:16:50,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:16:50,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:16:50,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:16:50,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:16:50,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:16:50,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:16:50,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:16:50,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 23:16:50,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:16:50,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:16:50,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:16:50,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:16:50,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:16:50,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:16:50,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:16:50,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:16:50,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:16:50,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-26 23:16:50,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:16:50,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 296 [2020-10-26 23:16:50,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:16:50,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:16:50,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:16:50,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-26 23:16:50,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:16:50,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:16:50,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263520596] [2020-10-26 23:16:50,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:16:50,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:16:50,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555367329] [2020-10-26 23:16:50,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:16:50,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:16:50,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:16:50,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:16:50,938 INFO L87 Difference]: Start difference. First operand 10420 states and 14290 transitions. Second operand 7 states. [2020-10-26 23:17:24,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:17:24,581 INFO L93 Difference]: Finished difference Result 22453 states and 33460 transitions. [2020-10-26 23:17:24,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:17:24,583 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 129 [2020-10-26 23:17:24,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:17:24,652 INFO L225 Difference]: With dead ends: 22453 [2020-10-26 23:17:24,652 INFO L226 Difference]: Without dead ends: 12039 [2020-10-26 23:17:24,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:17:24,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12039 states. [2020-10-26 23:17:25,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12039 to 11522. [2020-10-26 23:17:25,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11522 states. [2020-10-26 23:17:25,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11522 states to 11522 states and 14814 transitions. [2020-10-26 23:17:25,112 INFO L78 Accepts]: Start accepts. Automaton has 11522 states and 14814 transitions. Word has length 129 [2020-10-26 23:17:25,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:17:25,114 INFO L481 AbstractCegarLoop]: Abstraction has 11522 states and 14814 transitions. [2020-10-26 23:17:25,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:17:25,114 INFO L276 IsEmpty]: Start isEmpty. Operand 11522 states and 14814 transitions. [2020-10-26 23:17:25,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-10-26 23:17:25,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:17:25,133 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:17:25,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 23:17:25,134 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:17:25,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:17:25,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1730506009, now seen corresponding path program 1 times [2020-10-26 23:17:25,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:17:25,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774023033] [2020-10-26 23:17:25,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:17:25,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:17:25,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:25,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:26,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:27,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:17:27,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-26 23:17:27,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:17:27,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2666 [2020-10-26 23:17:27,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:17:27,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:17:27,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:17:27,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 197 [2020-10-26 23:17:27,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:17:28,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:17:28,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:17:28,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:28,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:17:28,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:17:28,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:17:28,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 23:17:28,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:17:28,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:17:28,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:17:28,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:17:28,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:17:28,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:17:28,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:17:28,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:28,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:28,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:17:28,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 23:17:28,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:17:28,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 219 [2020-10-26 23:17:28,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:17:28,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:17:28,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:17:28,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-26 23:17:28,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:17:28,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 23:17:28,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:17:28,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:28,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:17:28,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 23:17:28,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:17:28,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 187 [2020-10-26 23:17:28,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:17:28,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:17:28,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:17:28,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 23:17:28,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:17:29,038 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 95 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 23:17:29,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774023033] [2020-10-26 23:17:29,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:17:29,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:17:29,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161726640] [2020-10-26 23:17:29,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:17:29,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:17:29,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:17:29,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:17:29,044 INFO L87 Difference]: Start difference. First operand 11522 states and 14814 transitions. Second operand 8 states. [2020-10-26 23:17:29,198 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 23:17:53,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:17:53,378 INFO L93 Difference]: Finished difference Result 32247 states and 44040 transitions. [2020-10-26 23:17:53,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 23:17:53,380 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 203 [2020-10-26 23:17:53,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:17:53,464 INFO L225 Difference]: With dead ends: 32247 [2020-10-26 23:17:53,465 INFO L226 Difference]: Without dead ends: 21534 [2020-10-26 23:17:53,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-26 23:17:53,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21534 states. [2020-10-26 23:17:54,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21534 to 21051. [2020-10-26 23:17:54,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21051 states. [2020-10-26 23:17:54,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21051 states to 21051 states and 26206 transitions. [2020-10-26 23:17:54,155 INFO L78 Accepts]: Start accepts. Automaton has 21051 states and 26206 transitions. Word has length 203 [2020-10-26 23:17:54,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:17:54,156 INFO L481 AbstractCegarLoop]: Abstraction has 21051 states and 26206 transitions. [2020-10-26 23:17:54,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:17:54,157 INFO L276 IsEmpty]: Start isEmpty. Operand 21051 states and 26206 transitions. [2020-10-26 23:17:54,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-26 23:17:54,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:17:54,161 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:17:54,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 23:17:54,161 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:17:54,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:17:54,162 INFO L82 PathProgramCache]: Analyzing trace with hash -784454827, now seen corresponding path program 1 times [2020-10-26 23:17:54,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:17:54,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268666420] [2020-10-26 23:17:54,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:17:54,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:17:54,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:54,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:55,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:17:55,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-10-26 23:17:55,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:17:55,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1348 [2020-10-26 23:17:55,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:17:55,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:17:55,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-26 23:17:55,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-26 23:17:55,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:17:55,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:17:55,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:17:55,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:55,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:17:55,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:17:55,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:17:55,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 23:17:55,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:17:55,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:17:55,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:17:55,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:17:55,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:17:55,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:17:55,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:17:55,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:55,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:17:55,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 23:17:55,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:17:55,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-26 23:17:55,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:17:55,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:17:55,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:17:55,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 23:17:55,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:17:56,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 23:17:56,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:17:56,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:56,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:17:56,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-26 23:17:56,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:17:56,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 243 [2020-10-26 23:17:56,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:17:56,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:17:56,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:17:56,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-26 23:17:56,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:17:56,438 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:17:56,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268666420] [2020-10-26 23:17:56,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:17:56,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 23:17:56,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338770240] [2020-10-26 23:17:56,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:17:56,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:17:56,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:17:56,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:17:56,443 INFO L87 Difference]: Start difference. First operand 21051 states and 26206 transitions. Second operand 8 states. [2020-10-26 23:18:42,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:18:42,184 INFO L93 Difference]: Finished difference Result 62504 states and 86754 transitions. [2020-10-26 23:18:42,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 23:18:42,187 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 221 [2020-10-26 23:18:42,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:18:42,348 INFO L225 Difference]: With dead ends: 62504 [2020-10-26 23:18:42,349 INFO L226 Difference]: Without dead ends: 42262 [2020-10-26 23:18:42,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-26 23:18:42,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42262 states. [2020-10-26 23:18:43,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42262 to 41987. [2020-10-26 23:18:43,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41987 states. [2020-10-26 23:18:43,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41987 states to 41987 states and 56702 transitions. [2020-10-26 23:18:43,891 INFO L78 Accepts]: Start accepts. Automaton has 41987 states and 56702 transitions. Word has length 221 [2020-10-26 23:18:43,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:18:43,892 INFO L481 AbstractCegarLoop]: Abstraction has 41987 states and 56702 transitions. [2020-10-26 23:18:43,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:18:43,892 INFO L276 IsEmpty]: Start isEmpty. Operand 41987 states and 56702 transitions. [2020-10-26 23:18:43,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2020-10-26 23:18:43,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:18:43,901 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 23:18:43,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 23:18:43,901 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:18:43,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:18:43,902 INFO L82 PathProgramCache]: Analyzing trace with hash -2015513797, now seen corresponding path program 1 times [2020-10-26 23:18:43,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:18:43,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049264087] [2020-10-26 23:18:43,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:18:44,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:18:44,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:18:44,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:18:45,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:18:49,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:18:49,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 330 [2020-10-26 23:18:49,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:18:49,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-26 23:18:49,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:18:49,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:18:49,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-26 23:18:49,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-26 23:18:49,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:18:49,494 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:18:49,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:18:49,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:18:49,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:18:49,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:18:49,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:18:49,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:18:49,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 23:18:49,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:18:49,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:18:49,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:18:49,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:18:49,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:18:49,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:18:49,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:18:49,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:18:49,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:18:49,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 23:18:49,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:18:49,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-26 23:18:49,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:18:49,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:18:49,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:18:49,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 23:18:49,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:18:49,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 23:18:49,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:18:49,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:18:49,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:18:49,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 23:18:49,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:18:49,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-10-26 23:18:49,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:18:49,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:18:49,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:18:49,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 23:18:49,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:18:50,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2020-10-26 23:18:50,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:18:50,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:18:50,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:18:50,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-26 23:18:50,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:18:50,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-26 23:18:50,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:18:50,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:18:50,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-26 23:18:50,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:18:50,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:18:50,428 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 112 proven. 92 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-26 23:18:50,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049264087] [2020-10-26 23:18:50,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:18:50,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:18:50,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987270036] [2020-10-26 23:18:50,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:18:50,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:18:50,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:18:50,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:18:50,433 INFO L87 Difference]: Start difference. First operand 41987 states and 56702 transitions. Second operand 7 states. [2020-10-26 23:18:51,826 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-26 23:18:55,338 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 69