/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/Problem15_label40.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 23:44:17,299 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 23:44:17,303 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 23:44:17,364 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 23:44:17,365 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 23:44:17,373 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 23:44:17,375 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 23:44:17,381 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 23:44:17,384 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 23:44:17,391 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 23:44:17,392 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 23:44:17,394 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 23:44:17,395 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 23:44:17,398 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 23:44:17,401 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 23:44:17,403 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 23:44:17,404 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 23:44:17,408 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 23:44:17,415 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 23:44:17,426 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 23:44:17,428 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 23:44:17,431 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 23:44:17,432 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 23:44:17,435 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 23:44:17,444 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 23:44:17,445 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 23:44:17,445 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 23:44:17,447 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 23:44:17,447 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 23:44:17,449 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 23:44:17,449 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 23:44:17,450 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 23:44:17,451 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 23:44:17,452 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 23:44:17,453 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 23:44:17,454 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 23:44:17,454 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 23:44:17,455 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 23:44:17,455 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 23:44:17,456 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 23:44:17,457 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 23:44:17,458 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 23:44:17,513 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 23:44:17,513 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 23:44:17,515 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 23:44:17,515 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 23:44:17,515 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 23:44:17,516 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 23:44:17,516 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 23:44:17,516 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 23:44:17,516 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 23:44:17,516 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 23:44:17,517 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 23:44:17,517 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 23:44:17,517 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 23:44:17,517 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 23:44:17,518 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 23:44:17,518 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 23:44:17,518 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 23:44:17,518 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 23:44:17,519 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 23:44:17,519 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 23:44:17,519 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 23:44:17,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:44:17,520 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 23:44:17,520 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 23:44:17,520 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 23:44:17,520 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 23:44:17,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 23:44:17,521 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 23:44:17,521 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 23:44:17,521 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 23:44:17,916 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 23:44:17,947 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 23:44:17,953 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 23:44:17,954 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 23:44:17,955 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 23:44:17,957 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label40.c [2020-10-26 23:44:18,056 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f54536bd7/0acd84fe55f84d3d83c605e8a1740dca/FLAG11eef9e24 [2020-10-26 23:44:19,018 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 23:44:19,019 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem15_label40.c [2020-10-26 23:44:19,047 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f54536bd7/0acd84fe55f84d3d83c605e8a1740dca/FLAG11eef9e24 [2020-10-26 23:44:19,085 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f54536bd7/0acd84fe55f84d3d83c605e8a1740dca [2020-10-26 23:44:19,089 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 23:44:19,096 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 23:44:19,098 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 23:44:19,099 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 23:44:19,103 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 23:44:19,104 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:44:19" (1/1) ... [2020-10-26 23:44:19,108 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73e187d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:44:19, skipping insertion in model container [2020-10-26 23:44:19,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:44:19" (1/1) ... [2020-10-26 23:44:19,119 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 23:44:19,197 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 23:44:20,018 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:44:20,035 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 23:44:20,319 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:44:20,342 INFO L208 MainTranslator]: Completed translation [2020-10-26 23:44:20,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:44:20 WrapperNode [2020-10-26 23:44:20,343 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 23:44:20,344 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 23:44:20,344 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 23:44:20,344 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 23:44:20,359 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:44:20" (1/1) ... [2020-10-26 23:44:20,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:44:20" (1/1) ... [2020-10-26 23:44:20,411 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:44:20" (1/1) ... [2020-10-26 23:44:20,412 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:44:20" (1/1) ... [2020-10-26 23:44:20,525 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:44:20" (1/1) ... [2020-10-26 23:44:20,563 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:44:20" (1/1) ... [2020-10-26 23:44:20,580 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:44:20" (1/1) ... [2020-10-26 23:44:20,598 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 23:44:20,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 23:44:20,600 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 23:44:20,600 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 23:44:20,602 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:44:20" (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 23:44:20,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 23:44:20,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 23:44:20,700 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 23:44:20,701 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 23:44:20,701 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 23:44:20,702 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 23:44:20,702 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 23:44:20,703 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 23:44:20,703 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 23:44:20,703 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 23:44:20,704 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 23:44:20,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 23:44:20,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 23:44:20,705 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 23:44:20,705 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 23:44:20,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 23:44:20,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 23:44:20,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 23:44:20,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 23:44:20,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 23:44:20,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 23:44:25,205 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 23:44:25,205 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 23:44:25,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:44:25 BoogieIcfgContainer [2020-10-26 23:44:25,208 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 23:44:25,210 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 23:44:25,211 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 23:44:25,214 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 23:44:25,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:44:19" (1/3) ... [2020-10-26 23:44:25,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cbd1a2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:44:25, skipping insertion in model container [2020-10-26 23:44:25,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:44:20" (2/3) ... [2020-10-26 23:44:25,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cbd1a2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:44:25, skipping insertion in model container [2020-10-26 23:44:25,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:44:25" (3/3) ... [2020-10-26 23:44:25,219 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label40.c [2020-10-26 23:44:25,233 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 23:44:25,240 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 23:44:25,256 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 23:44:25,289 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 23:44:25,289 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 23:44:25,290 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 23:44:25,290 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 23:44:25,290 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 23:44:25,290 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 23:44:25,290 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 23:44:25,290 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 23:44:25,321 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states. [2020-10-26 23:44:25,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 23:44:25,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:44:25,332 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:44:25,332 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:44:25,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:44:25,340 INFO L82 PathProgramCache]: Analyzing trace with hash -654133201, now seen corresponding path program 1 times [2020-10-26 23:44:25,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:44:25,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124160709] [2020-10-26 23:44:25,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:44:25,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:44:25,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:44:26,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:44:26,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 23:44:26,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:44:26,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 623 [2020-10-26 23:44:26,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:44:26,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:44:26,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:44:26,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 23:44:26,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 23:44:26,386 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-26 23:44:26,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:44:26,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:44:26,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:44:26,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:44:26,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:44:26,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:44:26,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-26 23:44:26,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:44:26,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:44:26,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:44:26,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:44:26,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:44:26,449 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 23:44:26,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124160709] [2020-10-26 23:44:26,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:44:26,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 23:44:26,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120234973] [2020-10-26 23:44:26,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 23:44:26,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:44:26,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 23:44:26,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 23:44:26,483 INFO L87 Difference]: Start difference. First operand 441 states. Second operand 4 states. [2020-10-26 23:44:26,664 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-26 23:44:37,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:44:37,396 INFO L93 Difference]: Finished difference Result 1203 states and 2168 transitions. [2020-10-26 23:44:37,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:44:37,399 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-26 23:44:37,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:44:37,427 INFO L225 Difference]: With dead ends: 1203 [2020-10-26 23:44:37,427 INFO L226 Difference]: Without dead ends: 697 [2020-10-26 23:44:37,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:44:37,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2020-10-26 23:44:37,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 689. [2020-10-26 23:44:37,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 689 states. [2020-10-26 23:44:37,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 1009 transitions. [2020-10-26 23:44:37,553 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 1009 transitions. Word has length 33 [2020-10-26 23:44:37,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:44:37,554 INFO L481 AbstractCegarLoop]: Abstraction has 689 states and 1009 transitions. [2020-10-26 23:44:37,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 23:44:37,554 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 1009 transitions. [2020-10-26 23:44:37,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-26 23:44:37,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:44:37,560 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:44:37,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 23:44:37,560 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:44:37,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:44:37,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1686794471, now seen corresponding path program 1 times [2020-10-26 23:44:37,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:44:37,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410272891] [2020-10-26 23:44:37,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:44:37,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:44:37,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:44:37,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:44:39,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:44:39,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-26 23:44:39,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:44:39,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1657 [2020-10-26 23:44:39,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:44:39,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:44:39,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:44:39,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 23:44:39,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:44:39,471 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-26 23:44:39,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:44:39,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:44:39,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:44:39,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:44:39,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:44:39,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:44:39,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-26 23:44:39,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:44:39,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:44:39,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:44:39,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:44:39,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:44:39,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:44:39,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:44:39,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:44:39,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:44:39,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 23:44:39,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:44:39,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 211 [2020-10-26 23:44:39,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:44:39,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:44:39,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:44:39,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 23:44:39,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:44:39,934 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:44:39,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410272891] [2020-10-26 23:44:39,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:44:39,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:44:39,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879162059] [2020-10-26 23:44:39,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:44:39,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:44:39,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:44:39,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:44:39,946 INFO L87 Difference]: Start difference. First operand 689 states and 1009 transitions. Second operand 7 states. [2020-10-26 23:44:40,124 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 23:44:41,845 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-26 23:44:51,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:44:51,534 INFO L93 Difference]: Finished difference Result 1706 states and 2409 transitions. [2020-10-26 23:44:51,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 23:44:51,540 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 102 [2020-10-26 23:44:51,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:44:51,549 INFO L225 Difference]: With dead ends: 1706 [2020-10-26 23:44:51,549 INFO L226 Difference]: Without dead ends: 1023 [2020-10-26 23:44:51,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:44:51,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2020-10-26 23:44:51,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 1010. [2020-10-26 23:44:51,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1010 states. [2020-10-26 23:44:51,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1361 transitions. [2020-10-26 23:44:51,627 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1361 transitions. Word has length 102 [2020-10-26 23:44:51,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:44:51,628 INFO L481 AbstractCegarLoop]: Abstraction has 1010 states and 1361 transitions. [2020-10-26 23:44:51,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:44:51,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1361 transitions. [2020-10-26 23:44:51,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-26 23:44:51,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:44:51,645 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:44:51,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 23:44:51,646 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:44:51,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:44:51,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1159973121, now seen corresponding path program 1 times [2020-10-26 23:44:51,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:44:51,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018859409] [2020-10-26 23:44:51,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:44:51,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:44:51,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:44:51,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:44:52,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:44:52,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-26 23:44:52,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:44:52,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 849 [2020-10-26 23:44:52,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:44:52,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:44:52,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:44:52,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 23:44:52,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:44:52,762 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-26 23:44:52,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:44:52,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:44:52,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:44:52,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:44:52,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:44:52,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:44:52,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 23:44:52,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:44:52,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:44:52,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:44:52,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:44:52,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:44:52,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:44:52,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:44:52,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:44:52,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:44:52,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 23:44:52,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:44:52,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-26 23:44:52,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:44:52,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:44:52,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:44:52,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 23:44:52,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:44:53,051 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:44:53,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018859409] [2020-10-26 23:44:53,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:44:53,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-26 23:44:53,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240107766] [2020-10-26 23:44:53,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:44:53,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:44:53,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:44:53,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:44:53,056 INFO L87 Difference]: Start difference. First operand 1010 states and 1361 transitions. Second operand 8 states. [2020-10-26 23:44:53,209 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-26 23:44:56,872 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:45:00,038 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-26 23:45:17,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:45:17,942 INFO L93 Difference]: Finished difference Result 2699 states and 3973 transitions. [2020-10-26 23:45:17,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 23:45:17,944 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 107 [2020-10-26 23:45:17,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:45:17,959 INFO L225 Difference]: With dead ends: 2699 [2020-10-26 23:45:17,960 INFO L226 Difference]: Without dead ends: 2002 [2020-10-26 23:45:17,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-26 23:45:17,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2002 states. [2020-10-26 23:45:18,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2002 to 1972. [2020-10-26 23:45:18,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1972 states. [2020-10-26 23:45:18,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1972 states to 1972 states and 2636 transitions. [2020-10-26 23:45:18,034 INFO L78 Accepts]: Start accepts. Automaton has 1972 states and 2636 transitions. Word has length 107 [2020-10-26 23:45:18,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:45:18,035 INFO L481 AbstractCegarLoop]: Abstraction has 1972 states and 2636 transitions. [2020-10-26 23:45:18,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:45:18,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1972 states and 2636 transitions. [2020-10-26 23:45:18,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-26 23:45:18,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:45:18,038 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:45:18,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 23:45:18,038 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:45:18,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:45:18,039 INFO L82 PathProgramCache]: Analyzing trace with hash -812211013, now seen corresponding path program 1 times [2020-10-26 23:45:18,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:45:18,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028292090] [2020-10-26 23:45:18,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:45:18,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:45:18,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:45:18,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:45:18,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-26 23:45:18,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:45:18,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 282 [2020-10-26 23:45:18,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:45:18,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:45:18,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-26 23:45:18,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 23:45:18,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:45:18,586 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-26 23:45:18,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:45:18,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:45:18,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:45:18,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:45:18,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:45:18,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:45:18,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 23:45:18,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:45:18,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:45:18,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:45:18,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:45:18,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:45:18,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:45:18,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:45:18,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:45:18,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:45:18,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 23:45:18,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:45:18,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-26 23:45:18,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:45:18,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:45:18,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:45:18,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 23:45:18,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:45:18,874 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:45:18,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028292090] [2020-10-26 23:45:18,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:45:18,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:45:18,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37193239] [2020-10-26 23:45:18,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 23:45:18,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:45:18,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 23:45:18,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:45:18,890 INFO L87 Difference]: Start difference. First operand 1972 states and 2636 transitions. Second operand 5 states. [2020-10-26 23:45:19,697 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-26 23:45:32,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:45:32,097 INFO L93 Difference]: Finished difference Result 3971 states and 5772 transitions. [2020-10-26 23:45:32,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:45:32,099 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2020-10-26 23:45:32,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:45:32,120 INFO L225 Difference]: With dead ends: 3971 [2020-10-26 23:45:32,121 INFO L226 Difference]: Without dead ends: 2934 [2020-10-26 23:45:32,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:45:32,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2020-10-26 23:45:32,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 2927. [2020-10-26 23:45:32,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2927 states. [2020-10-26 23:45:32,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2927 states to 2927 states and 3775 transitions. [2020-10-26 23:45:32,212 INFO L78 Accepts]: Start accepts. Automaton has 2927 states and 3775 transitions. Word has length 128 [2020-10-26 23:45:32,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:45:32,213 INFO L481 AbstractCegarLoop]: Abstraction has 2927 states and 3775 transitions. [2020-10-26 23:45:32,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 23:45:32,213 INFO L276 IsEmpty]: Start isEmpty. Operand 2927 states and 3775 transitions. [2020-10-26 23:45:32,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-10-26 23:45:32,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:45:32,217 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:45:32,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 23:45:32,217 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:45:32,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:45:32,218 INFO L82 PathProgramCache]: Analyzing trace with hash 726839527, now seen corresponding path program 1 times [2020-10-26 23:45:32,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:45:32,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753074780] [2020-10-26 23:45:32,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:45:32,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:45:32,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:45:32,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:45:32,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:45:33,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:45:34,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:45:35,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:45:35,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 214 [2020-10-26 23:45:35,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 23:45:35,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3413 [2020-10-26 23:45:35,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:45:35,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:45:35,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:45:35,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 175 [2020-10-26 23:45:35,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:45:35,880 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-26 23:45:35,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:45:35,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:45:35,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:45:35,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:45:35,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:45:35,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:45:35,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 23:45:35,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:45:35,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:45:35,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:45:35,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:45:35,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:45:35,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:45:35,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:45:35,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:45:36,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:45:36,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 23:45:36,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:45:36,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-26 23:45:36,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:45:36,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:45:36,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:45:36,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-26 23:45:36,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:45:36,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-26 23:45:36,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:45:36,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:45:36,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:45:36,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 23:45:36,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:45:36,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-26 23:45:36,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:45:36,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:45:36,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:45:36,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-26 23:45:36,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:45:36,545 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 116 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 23:45:36,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753074780] [2020-10-26 23:45:36,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:45:36,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:45:36,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354032680] [2020-10-26 23:45:36,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:45:36,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:45:36,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:45:36,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:45:36,548 INFO L87 Difference]: Start difference. First operand 2927 states and 3775 transitions. Second operand 8 states. [2020-10-26 23:45:36,716 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-26 23:45:40,655 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-26 23:45:49,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:45:49,348 INFO L93 Difference]: Finished difference Result 6921 states and 9392 transitions. [2020-10-26 23:45:49,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 23:45:49,351 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 200 [2020-10-26 23:45:49,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:45:49,377 INFO L225 Difference]: With dead ends: 6921 [2020-10-26 23:45:49,377 INFO L226 Difference]: Without dead ends: 3959 [2020-10-26 23:45:49,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-26 23:45:49,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3959 states. [2020-10-26 23:45:49,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3959 to 3884. [2020-10-26 23:45:49,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3884 states. [2020-10-26 23:45:49,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3884 states to 3884 states and 4601 transitions. [2020-10-26 23:45:49,509 INFO L78 Accepts]: Start accepts. Automaton has 3884 states and 4601 transitions. Word has length 200 [2020-10-26 23:45:49,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:45:49,510 INFO L481 AbstractCegarLoop]: Abstraction has 3884 states and 4601 transitions. [2020-10-26 23:45:49,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:45:49,510 INFO L276 IsEmpty]: Start isEmpty. Operand 3884 states and 4601 transitions. [2020-10-26 23:45:49,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2020-10-26 23:45:49,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:45:49,515 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:45:49,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 23:45:49,515 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:45:49,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:45:49,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1215226280, now seen corresponding path program 1 times [2020-10-26 23:45:49,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:45:49,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036857819] [2020-10-26 23:45:49,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:45:49,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:45:49,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:45:50,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:45:50,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 282 [2020-10-26 23:45:50,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:45:50,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 554 [2020-10-26 23:45:50,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:45:50,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:45:50,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 247 [2020-10-26 23:45:50,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 23:45:50,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:45:50,347 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-26 23:45:50,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:45:50,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:45:50,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:45:50,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:45:50,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:45:50,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:45:50,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 23:45:50,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:45:50,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:45:50,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:45:50,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:45:50,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:45:50,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:45:50,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:45:50,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:45:50,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:45:50,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 238 [2020-10-26 23:45:50,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:45:50,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 294 [2020-10-26 23:45:50,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:45:50,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:45:50,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:45:50,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 232 [2020-10-26 23:45:50,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:45:50,945 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:45:50,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036857819] [2020-10-26 23:45:50,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:45:50,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:45:50,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651715450] [2020-10-26 23:45:50,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 23:45:50,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:45:50,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 23:45:50,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:45:50,951 INFO L87 Difference]: Start difference. First operand 3884 states and 4601 transitions. Second operand 5 states. [2020-10-26 23:45:52,683 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-26 23:46:03,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:46:03,514 INFO L93 Difference]: Finished difference Result 10300 states and 12515 transitions. [2020-10-26 23:46:03,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:46:03,523 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 270 [2020-10-26 23:46:03,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:46:03,556 INFO L225 Difference]: With dead ends: 10300 [2020-10-26 23:46:03,556 INFO L226 Difference]: Without dead ends: 6729 [2020-10-26 23:46:03,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:46:03,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6729 states. [2020-10-26 23:46:03,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6729 to 6414. [2020-10-26 23:46:03,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6414 states. [2020-10-26 23:46:03,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6414 states to 6414 states and 7517 transitions. [2020-10-26 23:46:03,784 INFO L78 Accepts]: Start accepts. Automaton has 6414 states and 7517 transitions. Word has length 270 [2020-10-26 23:46:03,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:46:03,785 INFO L481 AbstractCegarLoop]: Abstraction has 6414 states and 7517 transitions. [2020-10-26 23:46:03,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 23:46:03,785 INFO L276 IsEmpty]: Start isEmpty. Operand 6414 states and 7517 transitions. [2020-10-26 23:46:03,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-10-26 23:46:03,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:46:03,792 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:46:03,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 23:46:03,792 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:46:03,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:46:03,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1405191947, now seen corresponding path program 1 times [2020-10-26 23:46:03,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:46:03,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854940885] [2020-10-26 23:46:03,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:46:03,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:46:03,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:46:04,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:46:05,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:46:08,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:46:08,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 332 [2020-10-26 23:46:08,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:46:08,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 23:46:08,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:46:08,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:46:08,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:46:08,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 206 [2020-10-26 23:46:08,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:46:09,126 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-26 23:46:09,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:46:09,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:46:09,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:46:09,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:46:09,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:46:09,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:46:09,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 23:46:09,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:46:09,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:46:09,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:46:09,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:46:09,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:46:09,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:46:09,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:46:09,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:46:09,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:46:09,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-26 23:46:09,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:46:09,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 435 [2020-10-26 23:46:09,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:46:09,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:46:09,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:46:09,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-26 23:46:09,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:46:09,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-10-26 23:46:09,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:46:10,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:46:10,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:46:10,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-26 23:46:10,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:46:10,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-26 23:46:10,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:46:10,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:46:10,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-26 23:46:10,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:46:10,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:46:10,343 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 50 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 23:46:10,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854940885] [2020-10-26 23:46:10,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:46:10,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 23:46:10,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851079146] [2020-10-26 23:46:10,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:46:10,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:46:10,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:46:10,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:46:10,346 INFO L87 Difference]: Start difference. First operand 6414 states and 7517 transitions. Second operand 8 states. [2020-10-26 23:46:10,552 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-26 23:46:13,828 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-26 23:46:20,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:46:20,990 INFO L93 Difference]: Finished difference Result 12583 states and 14856 transitions. [2020-10-26 23:46:20,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 23:46:20,991 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 318 [2020-10-26 23:46:20,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:46:21,022 INFO L225 Difference]: With dead ends: 12583 [2020-10-26 23:46:21,022 INFO L226 Difference]: Without dead ends: 6482 [2020-10-26 23:46:21,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:46:21,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6482 states. [2020-10-26 23:46:21,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6482 to 6456. [2020-10-26 23:46:21,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6456 states. [2020-10-26 23:46:21,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6456 states to 6456 states and 7596 transitions. [2020-10-26 23:46:21,203 INFO L78 Accepts]: Start accepts. Automaton has 6456 states and 7596 transitions. Word has length 318 [2020-10-26 23:46:21,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:46:21,204 INFO L481 AbstractCegarLoop]: Abstraction has 6456 states and 7596 transitions. [2020-10-26 23:46:21,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:46:21,204 INFO L276 IsEmpty]: Start isEmpty. Operand 6456 states and 7596 transitions. [2020-10-26 23:46:21,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2020-10-26 23:46:21,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:46:21,213 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:46:21,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 23:46:21,213 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:46:21,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:46:21,214 INFO L82 PathProgramCache]: Analyzing trace with hash 795098260, now seen corresponding path program 1 times [2020-10-26 23:46:21,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:46:21,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [319517390] [2020-10-26 23:46:21,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:46:21,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:46:21,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:46:21,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:46:23,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:46:23,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 418 [2020-10-26 23:46:23,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:46:23,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2335 [2020-10-26 23:46:23,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:46:23,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:46:23,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 296 [2020-10-26 23:46:23,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-26 23:46:23,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:46:23,882 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-26 23:46:23,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:46:23,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:46:23,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:46:23,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:46:23,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:46:23,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:46:23,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 23:46:23,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:46:23,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:46:23,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:46:23,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:46:23,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:46:23,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:46:24,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:46:24,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:46:24,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:46:24,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:46:24,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:46:24,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 457 [2020-10-26 23:46:24,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:46:24,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:46:24,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:46:24,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 281 [2020-10-26 23:46:24,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 23:46:24,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:46:24,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:46:24,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:46:24,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:46:24,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-26 23:46:24,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:46:24,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-26 23:46:24,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:46:24,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:46:24,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:46:24,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-26 23:46:24,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:46:25,126 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:46:25,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [319517390] [2020-10-26 23:46:25,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:46:25,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 23:46:25,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419404773] [2020-10-26 23:46:25,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:46:25,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:46:25,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:46:25,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:46:25,130 INFO L87 Difference]: Start difference. First operand 6456 states and 7596 transitions. Second operand 8 states. [2020-10-26 23:46:25,298 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-26 23:46:27,766 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:46:31,456 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-26 23:46:38,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:46:38,578 INFO L93 Difference]: Finished difference Result 16404 states and 19959 transitions. [2020-10-26 23:46:38,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 23:46:38,580 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 404 [2020-10-26 23:46:38,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:46:38,619 INFO L225 Difference]: With dead ends: 16404 [2020-10-26 23:46:38,619 INFO L226 Difference]: Without dead ends: 10261 [2020-10-26 23:46:38,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-26 23:46:38,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10261 states. [2020-10-26 23:46:38,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10261 to 9929. [2020-10-26 23:46:38,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9929 states. [2020-10-26 23:46:38,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9929 states to 9929 states and 11652 transitions. [2020-10-26 23:46:38,937 INFO L78 Accepts]: Start accepts. Automaton has 9929 states and 11652 transitions. Word has length 404 [2020-10-26 23:46:38,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:46:38,938 INFO L481 AbstractCegarLoop]: Abstraction has 9929 states and 11652 transitions. [2020-10-26 23:46:38,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:46:38,938 INFO L276 IsEmpty]: Start isEmpty. Operand 9929 states and 11652 transitions. [2020-10-26 23:46:38,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-10-26 23:46:38,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:46:38,947 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:46:38,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 23:46:38,947 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:46:38,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:46:38,948 INFO L82 PathProgramCache]: Analyzing trace with hash -285419954, now seen corresponding path program 1 times [2020-10-26 23:46:38,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:46:38,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781991451] [2020-10-26 23:46:38,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:46:39,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:46:39,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:46:39,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:46:41,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:46:41,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 432 [2020-10-26 23:46:41,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:46:41,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2608 [2020-10-26 23:46:41,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:46:41,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:46:41,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-26 23:46:41,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-26 23:46:41,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:46:41,929 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-26 23:46:41,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:46:41,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:46:41,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:46:41,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:46:41,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:46:41,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:46:41,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 23:46:41,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:46:41,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:46:41,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:46:41,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:46:41,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:46:41,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:46:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:46:42,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:46:42,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:46:42,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-26 23:46:42,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:46:42,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 286 [2020-10-26 23:46:42,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:46:42,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:46:42,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:46:42,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-26 23:46:42,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:46:42,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-26 23:46:42,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:46:42,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:46:42,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:46:42,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:46:42,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:46:42,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-10-26 23:46:42,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:46:42,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:46:42,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:46:42,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-26 23:46:42,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:46:43,172 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 158 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:46:43,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781991451] [2020-10-26 23:46:43,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:46:43,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:46:43,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121642995] [2020-10-26 23:46:43,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:46:43,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:46:43,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:46:43,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:46:43,175 INFO L87 Difference]: Start difference. First operand 9929 states and 11652 transitions. Second operand 7 states. [2020-10-26 23:46:45,948 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-26 23:46:47,540 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-26 23:46:55,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:46:55,680 INFO L93 Difference]: Finished difference Result 19637 states and 23189 transitions. [2020-10-26 23:46:55,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:46:55,682 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 418 [2020-10-26 23:46:55,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:46:55,714 INFO L225 Difference]: With dead ends: 19637 [2020-10-26 23:46:55,714 INFO L226 Difference]: Without dead ends: 10021 [2020-10-26 23:46:55,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:46:55,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10021 states. [2020-10-26 23:46:55,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10021 to 9663. [2020-10-26 23:46:55,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9663 states. [2020-10-26 23:46:55,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9663 states to 9663 states and 11386 transitions. [2020-10-26 23:46:55,958 INFO L78 Accepts]: Start accepts. Automaton has 9663 states and 11386 transitions. Word has length 418 [2020-10-26 23:46:55,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:46:55,959 INFO L481 AbstractCegarLoop]: Abstraction has 9663 states and 11386 transitions. [2020-10-26 23:46:55,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:46:55,959 INFO L276 IsEmpty]: Start isEmpty. Operand 9663 states and 11386 transitions. [2020-10-26 23:46:55,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2020-10-26 23:46:55,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:46:55,971 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:46:55,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 23:46:55,971 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:46:55,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:46:55,972 INFO L82 PathProgramCache]: Analyzing trace with hash -222736042, now seen corresponding path program 1 times [2020-10-26 23:46:55,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:46:55,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124491897] [2020-10-26 23:46:55,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:46:56,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:46:56,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:46:56,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:46:56,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 444 [2020-10-26 23:46:56,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:46:56,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 725 [2020-10-26 23:46:56,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:46:56,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:46:56,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-26 23:46:56,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 23:46:56,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:46:57,056 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-26 23:46:57,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:46:57,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:46:57,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:46:57,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:46:57,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:46:57,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:46:57,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 23:46:57,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:46:57,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:46:57,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:46:57,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:46:57,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:46:57,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:46:57,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:46:57,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:46:57,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:46:57,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:46:57,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:46:57,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-26 23:46:57,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:46:57,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:46:57,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:46:57,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:46:57,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:46:57,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:46:57,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:46:57,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:46:57,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:46:57,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:46:57,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:46:57,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-10-26 23:46:57,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:46:57,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:46:57,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:46:57,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:46:57,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:46:57,622 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 51 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-26 23:46:57,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124491897] [2020-10-26 23:46:57,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:46:57,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:46:57,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169853353] [2020-10-26 23:46:57,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 23:46:57,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:46:57,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 23:46:57,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:46:57,625 INFO L87 Difference]: Start difference. First operand 9663 states and 11386 transitions. Second operand 5 states. [2020-10-26 23:47:00,039 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-26 23:47:07,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:47:07,727 INFO L93 Difference]: Finished difference Result 19332 states and 22814 transitions. [2020-10-26 23:47:07,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:47:07,729 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 430 [2020-10-26 23:47:07,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:47:07,757 INFO L225 Difference]: With dead ends: 19332 [2020-10-26 23:47:07,757 INFO L226 Difference]: Without dead ends: 9982 [2020-10-26 23:47:07,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:47:07,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9982 states. [2020-10-26 23:47:07,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9982 to 9977. [2020-10-26 23:47:07,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9977 states. [2020-10-26 23:47:07,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9977 states to 9977 states and 11399 transitions. [2020-10-26 23:47:07,984 INFO L78 Accepts]: Start accepts. Automaton has 9977 states and 11399 transitions. Word has length 430 [2020-10-26 23:47:07,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:47:07,985 INFO L481 AbstractCegarLoop]: Abstraction has 9977 states and 11399 transitions. [2020-10-26 23:47:07,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 23:47:07,986 INFO L276 IsEmpty]: Start isEmpty. Operand 9977 states and 11399 transitions. [2020-10-26 23:47:07,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2020-10-26 23:47:07,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:47:07,992 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:47:07,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 23:47:07,993 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:47:07,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:47:07,994 INFO L82 PathProgramCache]: Analyzing trace with hash -722316116, now seen corresponding path program 1 times [2020-10-26 23:47:07,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:47:07,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106774027] [2020-10-26 23:47:07,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:47:08,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:47:08,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:09,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:47:09,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 480 [2020-10-26 23:47:09,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:47:09,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 922 [2020-10-26 23:47:09,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:47:09,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:47:09,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 445 [2020-10-26 23:47:09,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 23:47:09,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:47:09,316 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-26 23:47:09,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:47:09,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:47:09,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:09,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:47:09,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:47:09,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:47:09,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 23:47:09,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:47:09,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:47:09,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:47:09,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:47:09,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:47:09,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:47:09,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:47:09,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:09,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:47:09,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:47:09,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:47:09,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-26 23:47:09,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:47:09,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:47:09,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:47:09,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:47:09,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:47:09,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:47:09,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:47:09,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:09,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:47:09,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-26 23:47:09,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:47:09,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-26 23:47:09,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:47:09,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:47:09,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:47:09,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-26 23:47:09,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:47:10,167 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 51 proven. 2 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-26 23:47:10,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106774027] [2020-10-26 23:47:10,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:47:10,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:47:10,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367869313] [2020-10-26 23:47:10,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 23:47:10,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:47:10,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 23:47:10,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:47:10,171 INFO L87 Difference]: Start difference. First operand 9977 states and 11399 transitions. Second operand 5 states. [2020-10-26 23:47:12,166 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-26 23:47:24,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:47:24,078 INFO L93 Difference]: Finished difference Result 23367 states and 26891 transitions. [2020-10-26 23:47:24,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:47:24,081 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 466 [2020-10-26 23:47:24,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:47:24,125 INFO L225 Difference]: With dead ends: 23367 [2020-10-26 23:47:24,126 INFO L226 Difference]: Without dead ends: 13703 [2020-10-26 23:47:24,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:47:24,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13703 states. [2020-10-26 23:47:24,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13703 to 13067. [2020-10-26 23:47:24,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13067 states. [2020-10-26 23:47:24,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13067 states to 13067 states and 14861 transitions. [2020-10-26 23:47:24,430 INFO L78 Accepts]: Start accepts. Automaton has 13067 states and 14861 transitions. Word has length 466 [2020-10-26 23:47:24,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:47:24,432 INFO L481 AbstractCegarLoop]: Abstraction has 13067 states and 14861 transitions. [2020-10-26 23:47:24,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 23:47:24,432 INFO L276 IsEmpty]: Start isEmpty. Operand 13067 states and 14861 transitions. [2020-10-26 23:47:24,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2020-10-26 23:47:24,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:47:24,440 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:47:24,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 23:47:24,441 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:47:24,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:47:24,442 INFO L82 PathProgramCache]: Analyzing trace with hash -567979387, now seen corresponding path program 1 times [2020-10-26 23:47:24,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:47:24,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043298464] [2020-10-26 23:47:24,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:47:24,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:47:24,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:24,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:26,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:27,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:27,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:29,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:47:29,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 537 [2020-10-26 23:47:29,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 23:47:29,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4866 [2020-10-26 23:47:29,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:47:29,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 23:47:29,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 296 [2020-10-26 23:47:29,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 206 [2020-10-26 23:47:29,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:47:29,712 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-26 23:47:29,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:47:29,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:47:29,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:29,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:47:29,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:47:29,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:47:29,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 23:47:29,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:47:29,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:47:29,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:47:29,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:47:29,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:47:29,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:47:29,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:47:29,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:30,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:47:30,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:47:30,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:47:30,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-10-26 23:47:30,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:47:30,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:47:30,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:47:30,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 281 [2020-10-26 23:47:30,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:47:30,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:47:30,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:47:30,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:30,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:47:30,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:47:30,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:47:30,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-26 23:47:30,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:47:30,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 23:47:30,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:47:30,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-26 23:47:30,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:47:30,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-26 23:47:30,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:47:30,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:30,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:30,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:47:30,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-26 23:47:30,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:47:30,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-10-26 23:47:30,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:47:30,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:47:30,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:47:30,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-26 23:47:30,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:47:30,966 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 269 proven. 92 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 23:47:30,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043298464] [2020-10-26 23:47:30,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:47:30,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 23:47:30,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660972760] [2020-10-26 23:47:30,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 23:47:30,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:47:30,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 23:47:30,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:47:30,969 INFO L87 Difference]: Start difference. First operand 13067 states and 14861 transitions. Second operand 10 states. [2020-10-26 23:47:31,183 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-26 23:47:34,531 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-26 23:47:36,657 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-26 23:47:37,592 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-26 23:47:37,988 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 23:47:38,507 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2020-10-26 23:47:54,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:47:54,606 INFO L93 Difference]: Finished difference Result 28096 states and 32643 transitions. [2020-10-26 23:47:54,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 23:47:54,610 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 521 [2020-10-26 23:47:54,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:47:54,660 INFO L225 Difference]: With dead ends: 28096 [2020-10-26 23:47:54,660 INFO L226 Difference]: Without dead ends: 17201 [2020-10-26 23:47:54,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=306, Invalid=1254, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 23:47:54,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17201 states. [2020-10-26 23:47:54,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17201 to 17166. [2020-10-26 23:47:54,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17166 states. [2020-10-26 23:47:55,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17166 states to 17166 states and 19565 transitions. [2020-10-26 23:47:55,014 INFO L78 Accepts]: Start accepts. Automaton has 17166 states and 19565 transitions. Word has length 521 [2020-10-26 23:47:55,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:47:55,014 INFO L481 AbstractCegarLoop]: Abstraction has 17166 states and 19565 transitions. [2020-10-26 23:47:55,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 23:47:55,015 INFO L276 IsEmpty]: Start isEmpty. Operand 17166 states and 19565 transitions. [2020-10-26 23:47:55,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2020-10-26 23:47:55,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:47:55,024 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:47:55,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 23:47:55,024 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:47:55,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:47:55,025 INFO L82 PathProgramCache]: Analyzing trace with hash -833785362, now seen corresponding path program 1 times [2020-10-26 23:47:55,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:47:55,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1709590551] [2020-10-26 23:47:55,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:47:55,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:47:55,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:55,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:56,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:56,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:58,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:58,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:58,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:47:58,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 574 [2020-10-26 23:47:58,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 23:47:58,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3620 [2020-10-26 23:47:58,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:47:58,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:47:58,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-26 23:47:58,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-26 23:47:58,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:47:58,975 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-26 23:47:58,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:47:58,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:47:58,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:58,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:47:58,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:47:58,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:47:58,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 23:47:58,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:47:58,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:47:58,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:47:58,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:47:58,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:47:59,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:47:59,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:47:59,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:59,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:47:59,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:47:59,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:47:59,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-26 23:47:59,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:47:59,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:47:59,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:47:59,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:47:59,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:47:59,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:47:59,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:47:59,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:59,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:47:59,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:47:59,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:47:59,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-26 23:47:59,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:47:59,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:47:59,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:47:59,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:47:59,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:47:59,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-26 23:47:59,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:47:59,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:59,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:47:59,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:47:59,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-26 23:47:59,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:47:59,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 252 [2020-10-26 23:47:59,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:47:59,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:47:59,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:47:59,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-26 23:47:59,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:48:00,106 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 311 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-26 23:48:00,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1709590551] [2020-10-26 23:48:00,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:48:00,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:48:00,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043929574] [2020-10-26 23:48:00,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:48:00,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:48:00,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:48:00,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:48:00,108 INFO L87 Difference]: Start difference. First operand 17166 states and 19565 transitions. Second operand 7 states. [2020-10-26 23:48:00,309 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 65