/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:14:57,140 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:14:57,143 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:14:57,195 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:14:57,196 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:14:57,203 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:14:57,205 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:14:57,210 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:14:57,213 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:14:57,219 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:14:57,221 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:14:57,222 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:14:57,223 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:14:57,226 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:14:57,229 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:14:57,231 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:14:57,232 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:14:57,236 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:14:57,243 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:14:57,254 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:14:57,256 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:14:57,258 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:14:57,259 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:14:57,260 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:14:57,270 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:14:57,271 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:14:57,271 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:14:57,272 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:14:57,273 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:14:57,274 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:14:57,274 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:14:57,275 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:14:57,276 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:14:57,277 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:14:57,278 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:14:57,279 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:14:57,279 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:14:57,280 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:14:57,280 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:14:57,281 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:14:57,282 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:14:57,283 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 14:14:57,311 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:14:57,311 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:14:57,313 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:14:57,313 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:14:57,314 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:14:57,314 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:14:57,314 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:14:57,314 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:14:57,315 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:14:57,315 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:14:57,315 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:14:57,315 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:14:57,315 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:14:57,316 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:14:57,316 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:14:57,316 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:14:57,316 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:14:57,317 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:14:57,317 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:14:57,317 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:14:57,317 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:14:57,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:14:57,318 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:14:57,318 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:14:57,318 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:14:57,318 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:14:57,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:14:57,319 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:14:57,319 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:14:57,319 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:14:57,705 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:14:57,740 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:14:57,745 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:14:57,747 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:14:57,748 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:14:57,750 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-1.i [2020-10-27 14:14:57,845 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0334dc906/20799bf60a644ba99f72f34d13de1661/FLAGbfc635929 [2020-10-27 14:14:58,607 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:14:58,608 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-1.i [2020-10-27 14:14:58,621 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0334dc906/20799bf60a644ba99f72f34d13de1661/FLAGbfc635929 [2020-10-27 14:14:58,967 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0334dc906/20799bf60a644ba99f72f34d13de1661 [2020-10-27 14:14:58,971 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:14:58,979 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:14:58,981 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:14:58,982 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:14:58,986 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:14:58,987 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:14:58" (1/1) ... [2020-10-27 14:14:58,993 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b33fd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:58, skipping insertion in model container [2020-10-27 14:14:58,994 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:14:58" (1/1) ... [2020-10-27 14:14:59,004 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:14:59,031 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:14:59,289 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:14:59,299 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:14:59,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:14:59,346 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:14:59,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:59 WrapperNode [2020-10-27 14:14:59,347 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:14:59,349 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:14:59,349 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:14:59,349 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:14:59,364 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:59" (1/1) ... [2020-10-27 14:14:59,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:59" (1/1) ... [2020-10-27 14:14:59,374 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:59" (1/1) ... [2020-10-27 14:14:59,375 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:59" (1/1) ... [2020-10-27 14:14:59,385 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:59" (1/1) ... [2020-10-27 14:14:59,395 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:59" (1/1) ... [2020-10-27 14:14:59,397 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:59" (1/1) ... [2020-10-27 14:14:59,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:14:59,402 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:14:59,402 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:14:59,402 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:14:59,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:59" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:14:59,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:14:59,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:14:59,488 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:14:59,488 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:14:59,488 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:14:59,488 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:14:59,488 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:14:59,489 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 14:14:59,489 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 14:14:59,489 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:14:59,489 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:14:59,489 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:14:59,489 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:14:59,490 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:14:59,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:14:59,490 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:14:59,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:14:59,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:14:59,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:14:59,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:15:00,047 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:15:00,048 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-27 14:15:00,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:15:00 BoogieIcfgContainer [2020-10-27 14:15:00,054 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:15:00,058 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:15:00,060 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:15:00,064 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:15:00,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:14:58" (1/3) ... [2020-10-27 14:15:00,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@383f522c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:15:00, skipping insertion in model container [2020-10-27 14:15:00,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:59" (2/3) ... [2020-10-27 14:15:00,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@383f522c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:15:00, skipping insertion in model container [2020-10-27 14:15:00,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:15:00" (3/3) ... [2020-10-27 14:15:00,070 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_ground-1.i [2020-10-27 14:15:00,086 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:15:00,093 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:15:00,110 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:15:00,156 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:15:00,156 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:15:00,157 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:15:00,157 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:15:00,158 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:15:00,158 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:15:00,159 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:15:00,159 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:15:00,184 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-10-27 14:15:00,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 14:15:00,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:00,197 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:00,197 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:00,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:00,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1006986874, now seen corresponding path program 1 times [2020-10-27 14:15:00,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:00,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439235019] [2020-10-27 14:15:00,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:00,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:00,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:00,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:00,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:00,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 14:15:00,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:15:00,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 308 [2020-10-27 14:15:00,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:00,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:00,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:00,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:00,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:15:00,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:00,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:00,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:00,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:00,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:00,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:00,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 14:15:00,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:00,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:00,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:00,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:00,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:00,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:00,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439235019] [2020-10-27 14:15:00,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:15:00,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:15:00,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342045223] [2020-10-27 14:15:00,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:15:00,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:00,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:15:00,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:15:00,912 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 3 states. [2020-10-27 14:15:01,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:01,087 INFO L93 Difference]: Finished difference Result 89 states and 133 transitions. [2020-10-27 14:15:01,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:15:01,090 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-27 14:15:01,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:01,100 INFO L225 Difference]: With dead ends: 89 [2020-10-27 14:15:01,100 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 14:15:01,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:15:01,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 14:15:01,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-27 14:15:01,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 14:15:01,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2020-10-27 14:15:01,155 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 18 [2020-10-27 14:15:01,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:01,156 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2020-10-27 14:15:01,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:15:01,156 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2020-10-27 14:15:01,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 14:15:01,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:01,158 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:01,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:15:01,159 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:01,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:01,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1889588042, now seen corresponding path program 1 times [2020-10-27 14:15:01,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:01,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614674422] [2020-10-27 14:15:01,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:01,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:01,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:01,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:01,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:01,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 14:15:01,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:15:01,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-27 14:15:01,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:01,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:15:01,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:15:01,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 14:15:01,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:01,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:01,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:01,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:01,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:01,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:01,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:01,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:15:01,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:01,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:01,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:01,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:01,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:01,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:01,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614674422] [2020-10-27 14:15:01,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:15:01,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:15:01,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437518425] [2020-10-27 14:15:01,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:15:01,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:01,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:15:01,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:15:01,441 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 4 states. [2020-10-27 14:15:01,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:01,732 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2020-10-27 14:15:01,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:15:01,732 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-27 14:15:01,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:01,734 INFO L225 Difference]: With dead ends: 75 [2020-10-27 14:15:01,735 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 14:15:01,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:15:01,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 14:15:01,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 43. [2020-10-27 14:15:01,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 14:15:01,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2020-10-27 14:15:01,750 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 18 [2020-10-27 14:15:01,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:01,751 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2020-10-27 14:15:01,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:15:01,751 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2020-10-27 14:15:01,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 14:15:01,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:01,752 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] [2020-10-27 14:15:01,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:15:01,753 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:01,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:01,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1078257741, now seen corresponding path program 1 times [2020-10-27 14:15:01,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:01,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164227807] [2020-10-27 14:15:01,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:01,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:01,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:01,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:01,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:01,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:02,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:02,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 14:15:02,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:15:02,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 519 [2020-10-27 14:15:02,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:02,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:15:02,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:02,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 14:15:02,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:02,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:02,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:02,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:02,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:02,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:02,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:02,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:15:02,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:02,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:02,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:02,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:02,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:02,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:02,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164227807] [2020-10-27 14:15:02,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:15:02,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:15:02,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66081405] [2020-10-27 14:15:02,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:15:02,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:02,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:15:02,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:15:02,341 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand 4 states. [2020-10-27 14:15:02,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:02,489 INFO L93 Difference]: Finished difference Result 93 states and 122 transitions. [2020-10-27 14:15:02,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:15:02,490 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-27 14:15:02,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:02,491 INFO L225 Difference]: With dead ends: 93 [2020-10-27 14:15:02,492 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 14:15:02,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:15:02,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 14:15:02,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 47. [2020-10-27 14:15:02,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 14:15:02,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2020-10-27 14:15:02,503 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 20 [2020-10-27 14:15:02,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:02,503 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2020-10-27 14:15:02,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:15:02,504 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2020-10-27 14:15:02,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 14:15:02,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:02,505 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] [2020-10-27 14:15:02,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:15:02,505 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:02,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:02,506 INFO L82 PathProgramCache]: Analyzing trace with hash 685230731, now seen corresponding path program 1 times [2020-10-27 14:15:02,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:02,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614735012] [2020-10-27 14:15:02,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:02,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:02,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:02,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:02,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:02,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:02,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 14:15:02,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:15:02,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 329 [2020-10-27 14:15:02,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:02,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:15:02,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:15:02,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 14:15:02,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:02,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:02,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:02,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:02,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:02,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:02,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:02,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:15:02,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:02,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:02,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:02,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:02,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:15:02,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:02,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614735012] [2020-10-27 14:15:02,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:15:02,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 14:15:02,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765026277] [2020-10-27 14:15:02,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:15:02,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:02,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:15:02,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:15:02,908 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand 5 states. [2020-10-27 14:15:03,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:03,131 INFO L93 Difference]: Finished difference Result 109 states and 146 transitions. [2020-10-27 14:15:03,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:15:03,131 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-27 14:15:03,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:03,133 INFO L225 Difference]: With dead ends: 109 [2020-10-27 14:15:03,133 INFO L226 Difference]: Without dead ends: 72 [2020-10-27 14:15:03,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:15:03,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-27 14:15:03,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 48. [2020-10-27 14:15:03,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 14:15:03,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2020-10-27 14:15:03,143 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 20 [2020-10-27 14:15:03,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:03,144 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2020-10-27 14:15:03,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:15:03,144 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2020-10-27 14:15:03,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 14:15:03,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:03,145 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] [2020-10-27 14:15:03,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:15:03,146 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:03,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:03,146 INFO L82 PathProgramCache]: Analyzing trace with hash 240441052, now seen corresponding path program 1 times [2020-10-27 14:15:03,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:03,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957641990] [2020-10-27 14:15:03,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:03,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:03,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:03,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:03,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:03,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:03,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 14:15:03,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:15:03,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 436 [2020-10-27 14:15:03,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:03,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:15:03,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:15:03,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 14:15:03,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:03,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:03,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:03,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:03,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:03,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:03,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:03,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:15:03,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:03,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:03,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:03,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:03,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:03,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:15:03,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957641990] [2020-10-27 14:15:03,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:15:03,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 14:15:03,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222724483] [2020-10-27 14:15:03,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:15:03,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:03,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:15:03,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:15:03,659 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand 5 states. [2020-10-27 14:15:03,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:03,825 INFO L93 Difference]: Finished difference Result 101 states and 134 transitions. [2020-10-27 14:15:03,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:15:03,826 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-27 14:15:03,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:03,827 INFO L225 Difference]: With dead ends: 101 [2020-10-27 14:15:03,827 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 14:15:03,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:15:03,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 14:15:03,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2020-10-27 14:15:03,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 14:15:03,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2020-10-27 14:15:03,837 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 23 [2020-10-27 14:15:03,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:03,838 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2020-10-27 14:15:03,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:15:03,838 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2020-10-27 14:15:03,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 14:15:03,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:03,839 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] [2020-10-27 14:15:03,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:15:03,840 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:03,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:03,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1944014782, now seen corresponding path program 1 times [2020-10-27 14:15:03,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:03,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339515493] [2020-10-27 14:15:03,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:03,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:03,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:03,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:03,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:04,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:04,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:04,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 14:15:04,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:15:04,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 953 [2020-10-27 14:15:04,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:04,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:15:04,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:04,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 14:15:04,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:04,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:04,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:04,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:04,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:04,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:04,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:04,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:15:04,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:04,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:04,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:04,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:04,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:04,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:04,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339515493] [2020-10-27 14:15:04,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:04,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:15:04,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843623005] [2020-10-27 14:15:04,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:15:04,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:04,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:15:04,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:15:04,893 INFO L87 Difference]: Start difference. First operand 58 states and 76 transitions. Second operand 7 states. [2020-10-27 14:15:05,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:05,352 INFO L93 Difference]: Finished difference Result 210 states and 292 transitions. [2020-10-27 14:15:05,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:15:05,353 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-27 14:15:05,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:05,354 INFO L225 Difference]: With dead ends: 210 [2020-10-27 14:15:05,355 INFO L226 Difference]: Without dead ends: 169 [2020-10-27 14:15:05,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:15:05,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-27 14:15:05,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 92. [2020-10-27 14:15:05,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-27 14:15:05,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 126 transitions. [2020-10-27 14:15:05,372 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 126 transitions. Word has length 24 [2020-10-27 14:15:05,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:05,372 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 126 transitions. [2020-10-27 14:15:05,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:15:05,372 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 126 transitions. [2020-10-27 14:15:05,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 14:15:05,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:05,373 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:05,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:15:05,374 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:05,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:05,374 INFO L82 PathProgramCache]: Analyzing trace with hash -597115055, now seen corresponding path program 2 times [2020-10-27 14:15:05,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:05,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580158268] [2020-10-27 14:15:05,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:05,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:05,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:05,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:05,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:05,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:06,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:06,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 14:15:06,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:15:06,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1203 [2020-10-27 14:15:06,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:06,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:15:06,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:06,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 14:15:06,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:06,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:06,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:06,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:06,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:06,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:06,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:06,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:15:06,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:06,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:06,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:06,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:06,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:06,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:06,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580158268] [2020-10-27 14:15:06,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:06,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:15:06,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713594655] [2020-10-27 14:15:06,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:15:06,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:06,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:15:06,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:15:06,670 INFO L87 Difference]: Start difference. First operand 92 states and 126 transitions. Second operand 8 states. [2020-10-27 14:15:07,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:07,346 INFO L93 Difference]: Finished difference Result 361 states and 515 transitions. [2020-10-27 14:15:07,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:15:07,347 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-27 14:15:07,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:07,349 INFO L225 Difference]: With dead ends: 361 [2020-10-27 14:15:07,350 INFO L226 Difference]: Without dead ends: 291 [2020-10-27 14:15:07,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:15:07,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-27 14:15:07,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 104. [2020-10-27 14:15:07,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-27 14:15:07,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 144 transitions. [2020-10-27 14:15:07,372 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 144 transitions. Word has length 27 [2020-10-27 14:15:07,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:07,373 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 144 transitions. [2020-10-27 14:15:07,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:15:07,373 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 144 transitions. [2020-10-27 14:15:07,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 14:15:07,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:07,374 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:07,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:15:07,374 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:07,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:07,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1308172770, now seen corresponding path program 3 times [2020-10-27 14:15:07,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:07,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334942318] [2020-10-27 14:15:07,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:07,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:07,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:07,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:07,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:07,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:09,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:09,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 14:15:09,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:15:09,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1859 [2020-10-27 14:15:09,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:09,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:15:09,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:09,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:15:09,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:15:09,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:09,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:09,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:09,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:09,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:09,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:09,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:15:09,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:09,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:09,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:09,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:09,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:09,381 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:09,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334942318] [2020-10-27 14:15:09,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:09,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:15:09,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409785946] [2020-10-27 14:15:09,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:15:09,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:09,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:15:09,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:15:09,387 INFO L87 Difference]: Start difference. First operand 104 states and 144 transitions. Second operand 9 states. [2020-10-27 14:15:10,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:10,297 INFO L93 Difference]: Finished difference Result 448 states and 645 transitions. [2020-10-27 14:15:10,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:15:10,298 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-10-27 14:15:10,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:10,304 INFO L225 Difference]: With dead ends: 448 [2020-10-27 14:15:10,304 INFO L226 Difference]: Without dead ends: 372 [2020-10-27 14:15:10,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:15:10,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-10-27 14:15:10,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 116. [2020-10-27 14:15:10,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-27 14:15:10,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 162 transitions. [2020-10-27 14:15:10,346 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 162 transitions. Word has length 30 [2020-10-27 14:15:10,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:10,347 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 162 transitions. [2020-10-27 14:15:10,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:15:10,347 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 162 transitions. [2020-10-27 14:15:10,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 14:15:10,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:10,356 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:10,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:15:10,356 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:10,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:10,357 INFO L82 PathProgramCache]: Analyzing trace with hash -550016591, now seen corresponding path program 4 times [2020-10-27 14:15:10,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:10,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073385308] [2020-10-27 14:15:10,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:10,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:10,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:10,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:10,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:10,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:12,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:12,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 14:15:12,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:15:12,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2108 [2020-10-27 14:15:12,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:12,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:15:12,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:12,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 14:15:12,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:12,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:12,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:12,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:12,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:12,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:12,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:12,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:15:12,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:12,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:12,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:12,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:12,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:15:12,608 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:12,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073385308] [2020-10-27 14:15:12,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:12,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:15:12,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831276911] [2020-10-27 14:15:12,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:15:12,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:12,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:15:12,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:15:12,620 INFO L87 Difference]: Start difference. First operand 116 states and 162 transitions. Second operand 10 states. [2020-10-27 14:15:14,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:14,010 INFO L93 Difference]: Finished difference Result 535 states and 775 transitions. [2020-10-27 14:15:14,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:15:14,010 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-27 14:15:14,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:14,016 INFO L225 Difference]: With dead ends: 535 [2020-10-27 14:15:14,017 INFO L226 Difference]: Without dead ends: 453 [2020-10-27 14:15:14,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:15:14,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2020-10-27 14:15:14,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 128. [2020-10-27 14:15:14,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-27 14:15:14,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 180 transitions. [2020-10-27 14:15:14,057 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 180 transitions. Word has length 33 [2020-10-27 14:15:14,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:14,057 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 180 transitions. [2020-10-27 14:15:14,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:15:14,058 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 180 transitions. [2020-10-27 14:15:14,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 14:15:14,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:14,060 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:14,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:15:14,060 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:14,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:14,061 INFO L82 PathProgramCache]: Analyzing trace with hash -35791998, now seen corresponding path program 5 times [2020-10-27 14:15:14,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:14,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286133848] [2020-10-27 14:15:14,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:14,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:14,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:14,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:14,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:14,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:16,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:16,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 14:15:16,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:15:16,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2714 [2020-10-27 14:15:16,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:16,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:15:16,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:16,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:15:16,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:16,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:16,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:16,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:16,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:16,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:16,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:16,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:15:16,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:16,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:16,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:16,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:16,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:16,929 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:16,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286133848] [2020-10-27 14:15:16,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:16,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:15:16,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071835920] [2020-10-27 14:15:16,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:15:16,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:16,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:15:16,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:15:16,932 INFO L87 Difference]: Start difference. First operand 128 states and 180 transitions. Second operand 11 states. [2020-10-27 14:15:18,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:18,293 INFO L93 Difference]: Finished difference Result 622 states and 905 transitions. [2020-10-27 14:15:18,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:15:18,294 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-10-27 14:15:18,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:18,300 INFO L225 Difference]: With dead ends: 622 [2020-10-27 14:15:18,300 INFO L226 Difference]: Without dead ends: 534 [2020-10-27 14:15:18,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:15:18,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2020-10-27 14:15:18,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 140. [2020-10-27 14:15:18,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-27 14:15:18,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 198 transitions. [2020-10-27 14:15:18,323 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 198 transitions. Word has length 36 [2020-10-27 14:15:18,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:18,323 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 198 transitions. [2020-10-27 14:15:18,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:15:18,323 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 198 transitions. [2020-10-27 14:15:18,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 14:15:18,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:18,324 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:18,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:15:18,324 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:18,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:18,325 INFO L82 PathProgramCache]: Analyzing trace with hash -919286767, now seen corresponding path program 6 times [2020-10-27 14:15:18,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:18,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231750604] [2020-10-27 14:15:18,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:18,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:18,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:18,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:18,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:18,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:21,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:21,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 14:15:21,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:15:21,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2922 [2020-10-27 14:15:21,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:21,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:15:21,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:21,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 14:15:21,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:21,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:21,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:21,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:21,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:21,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:21,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:21,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:15:21,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:21,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:21,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:21,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:21,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:21,397 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:21,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231750604] [2020-10-27 14:15:21,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:21,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:15:21,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335525817] [2020-10-27 14:15:21,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:15:21,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:21,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:15:21,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:15:21,400 INFO L87 Difference]: Start difference. First operand 140 states and 198 transitions. Second operand 12 states. [2020-10-27 14:15:23,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:23,034 INFO L93 Difference]: Finished difference Result 709 states and 1035 transitions. [2020-10-27 14:15:23,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:15:23,035 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-27 14:15:23,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:23,039 INFO L225 Difference]: With dead ends: 709 [2020-10-27 14:15:23,039 INFO L226 Difference]: Without dead ends: 615 [2020-10-27 14:15:23,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:15:23,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2020-10-27 14:15:23,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 152. [2020-10-27 14:15:23,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-27 14:15:23,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 216 transitions. [2020-10-27 14:15:23,062 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 216 transitions. Word has length 39 [2020-10-27 14:15:23,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:23,062 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 216 transitions. [2020-10-27 14:15:23,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:15:23,062 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 216 transitions. [2020-10-27 14:15:23,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 14:15:23,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:23,063 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:23,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:15:23,064 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:23,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:23,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1552360158, now seen corresponding path program 7 times [2020-10-27 14:15:23,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:23,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811928195] [2020-10-27 14:15:23,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:23,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:23,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:23,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:23,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:23,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:25,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:25,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 14:15:25,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:15:25,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2919 [2020-10-27 14:15:25,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:25,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:15:25,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:25,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:15:25,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:26,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:26,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:26,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:26,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:26,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:26,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:26,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:15:26,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:26,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:26,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:26,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:26,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:26,155 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:26,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811928195] [2020-10-27 14:15:26,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:26,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:15:26,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69001243] [2020-10-27 14:15:26,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:15:26,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:26,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:15:26,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:15:26,158 INFO L87 Difference]: Start difference. First operand 152 states and 216 transitions. Second operand 13 states. [2020-10-27 14:15:27,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:27,934 INFO L93 Difference]: Finished difference Result 796 states and 1165 transitions. [2020-10-27 14:15:27,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:15:27,940 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-10-27 14:15:27,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:27,949 INFO L225 Difference]: With dead ends: 796 [2020-10-27 14:15:27,949 INFO L226 Difference]: Without dead ends: 696 [2020-10-27 14:15:27,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:15:27,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2020-10-27 14:15:27,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 164. [2020-10-27 14:15:27,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-27 14:15:27,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 234 transitions. [2020-10-27 14:15:27,978 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 234 transitions. Word has length 42 [2020-10-27 14:15:27,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:27,978 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 234 transitions. [2020-10-27 14:15:27,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:15:27,979 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 234 transitions. [2020-10-27 14:15:27,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:15:27,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:27,979 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:27,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:15:27,980 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:27,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:27,982 INFO L82 PathProgramCache]: Analyzing trace with hash 2054612593, now seen corresponding path program 8 times [2020-10-27 14:15:27,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:27,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164839504] [2020-10-27 14:15:27,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:27,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:27,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:28,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:28,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:28,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:31,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:31,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 14:15:31,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:15:31,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3541 [2020-10-27 14:15:31,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:31,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:15:31,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:31,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 14:15:31,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:31,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:31,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:31,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:31,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:31,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:31,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:31,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:15:31,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:31,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:31,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:31,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:31,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:31,703 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:31,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164839504] [2020-10-27 14:15:31,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:31,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:15:31,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425651579] [2020-10-27 14:15:31,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:15:31,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:31,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:15:31,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:15:31,706 INFO L87 Difference]: Start difference. First operand 164 states and 234 transitions. Second operand 14 states. [2020-10-27 14:15:33,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:33,633 INFO L93 Difference]: Finished difference Result 883 states and 1295 transitions. [2020-10-27 14:15:33,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:15:33,634 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2020-10-27 14:15:33,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:33,639 INFO L225 Difference]: With dead ends: 883 [2020-10-27 14:15:33,639 INFO L226 Difference]: Without dead ends: 777 [2020-10-27 14:15:33,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=344, Invalid=712, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:15:33,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2020-10-27 14:15:33,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 176. [2020-10-27 14:15:33,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-27 14:15:33,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 252 transitions. [2020-10-27 14:15:33,675 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 252 transitions. Word has length 45 [2020-10-27 14:15:33,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:33,676 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 252 transitions. [2020-10-27 14:15:33,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:15:33,677 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 252 transitions. [2020-10-27 14:15:33,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 14:15:33,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:33,683 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:33,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:15:33,684 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:33,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:33,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1593059010, now seen corresponding path program 9 times [2020-10-27 14:15:33,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:33,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184203509] [2020-10-27 14:15:33,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:33,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:33,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:33,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:33,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:33,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:37,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:37,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 14:15:37,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:15:37,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4101 [2020-10-27 14:15:37,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:37,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:15:37,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:37,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:15:37,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:38,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:38,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:38,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:38,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:38,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:38,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:38,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:15:38,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:38,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:38,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:38,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:38,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:38,018 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:38,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184203509] [2020-10-27 14:15:38,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:38,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:15:38,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885382600] [2020-10-27 14:15:38,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:15:38,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:38,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:15:38,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:15:38,023 INFO L87 Difference]: Start difference. First operand 176 states and 252 transitions. Second operand 15 states. [2020-10-27 14:15:40,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:40,142 INFO L93 Difference]: Finished difference Result 970 states and 1425 transitions. [2020-10-27 14:15:40,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 14:15:40,143 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 48 [2020-10-27 14:15:40,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:40,149 INFO L225 Difference]: With dead ends: 970 [2020-10-27 14:15:40,149 INFO L226 Difference]: Without dead ends: 858 [2020-10-27 14:15:40,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=411, Invalid=849, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:15:40,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2020-10-27 14:15:40,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 188. [2020-10-27 14:15:40,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-27 14:15:40,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 270 transitions. [2020-10-27 14:15:40,181 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 270 transitions. Word has length 48 [2020-10-27 14:15:40,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:40,181 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 270 transitions. [2020-10-27 14:15:40,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:15:40,182 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 270 transitions. [2020-10-27 14:15:40,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 14:15:40,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:40,183 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:40,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:15:40,183 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:40,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:40,184 INFO L82 PathProgramCache]: Analyzing trace with hash -359417647, now seen corresponding path program 10 times [2020-10-27 14:15:40,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:40,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71462536] [2020-10-27 14:15:40,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:40,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:40,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:40,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:40,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:41,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:43,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:43,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 14:15:43,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:15:43,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3347 [2020-10-27 14:15:43,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:43,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:15:43,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:43,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 14:15:43,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:43,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:43,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:43,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:43,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:43,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:43,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:43,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:15:43,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:43,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:43,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:43,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:43,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:43,786 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:43,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71462536] [2020-10-27 14:15:43,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:43,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:15:43,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792297568] [2020-10-27 14:15:43,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:15:43,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:43,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:15:43,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:15:43,789 INFO L87 Difference]: Start difference. First operand 188 states and 270 transitions. Second operand 16 states. [2020-10-27 14:15:46,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:46,150 INFO L93 Difference]: Finished difference Result 1057 states and 1555 transitions. [2020-10-27 14:15:46,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 14:15:46,151 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2020-10-27 14:15:46,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:46,157 INFO L225 Difference]: With dead ends: 1057 [2020-10-27 14:15:46,157 INFO L226 Difference]: Without dead ends: 939 [2020-10-27 14:15:46,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=484, Invalid=998, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:15:46,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2020-10-27 14:15:46,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 200. [2020-10-27 14:15:46,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-27 14:15:46,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 288 transitions. [2020-10-27 14:15:46,190 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 288 transitions. Word has length 51 [2020-10-27 14:15:46,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:46,191 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 288 transitions. [2020-10-27 14:15:46,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:15:46,191 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 288 transitions. [2020-10-27 14:15:46,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 14:15:46,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:46,192 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:46,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:15:46,192 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:46,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:46,193 INFO L82 PathProgramCache]: Analyzing trace with hash 150583394, now seen corresponding path program 11 times [2020-10-27 14:15:46,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:46,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832010300] [2020-10-27 14:15:46,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:46,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:46,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:46,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:46,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:47,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:49,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:49,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 14:15:49,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:15:49,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3234 [2020-10-27 14:15:49,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:49,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:15:49,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:49,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 14:15:49,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:49,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:49,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:49,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:49,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:49,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:49,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:49,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:15:49,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:49,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:49,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:49,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:49,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:49,672 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:49,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832010300] [2020-10-27 14:15:49,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:49,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:15:49,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026508340] [2020-10-27 14:15:49,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:15:49,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:49,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:15:49,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:15:49,674 INFO L87 Difference]: Start difference. First operand 200 states and 288 transitions. Second operand 17 states. [2020-10-27 14:15:52,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:52,441 INFO L93 Difference]: Finished difference Result 1144 states and 1685 transitions. [2020-10-27 14:15:52,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 14:15:52,442 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 54 [2020-10-27 14:15:52,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:52,448 INFO L225 Difference]: With dead ends: 1144 [2020-10-27 14:15:52,448 INFO L226 Difference]: Without dead ends: 1020 [2020-10-27 14:15:52,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=1159, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 14:15:52,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2020-10-27 14:15:52,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 212. [2020-10-27 14:15:52,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-27 14:15:52,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 306 transitions. [2020-10-27 14:15:52,485 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 306 transitions. Word has length 54 [2020-10-27 14:15:52,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:52,485 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 306 transitions. [2020-10-27 14:15:52,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:15:52,485 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 306 transitions. [2020-10-27 14:15:52,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 14:15:52,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:52,486 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:52,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:15:52,486 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:52,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:52,487 INFO L82 PathProgramCache]: Analyzing trace with hash -2002697423, now seen corresponding path program 12 times [2020-10-27 14:15:52,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:52,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119943347] [2020-10-27 14:15:52,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:52,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:52,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:52,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:52,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:53,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:56,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:56,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 14:15:56,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:15:56,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3748 [2020-10-27 14:15:56,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:56,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:15:56,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:56,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 14:15:56,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:56,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:56,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:56,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:56,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:56,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:56,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:56,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:15:56,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:56,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:56,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:56,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:56,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:56,555 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:56,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119943347] [2020-10-27 14:15:56,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:56,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:15:56,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714962459] [2020-10-27 14:15:56,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:15:56,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:56,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:15:56,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:15:56,565 INFO L87 Difference]: Start difference. First operand 212 states and 306 transitions. Second operand 18 states. [2020-10-27 14:15:59,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:59,620 INFO L93 Difference]: Finished difference Result 1231 states and 1815 transitions. [2020-10-27 14:15:59,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 14:15:59,621 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 57 [2020-10-27 14:15:59,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:59,627 INFO L225 Difference]: With dead ends: 1231 [2020-10-27 14:15:59,627 INFO L226 Difference]: Without dead ends: 1101 [2020-10-27 14:15:59,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=648, Invalid=1332, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 14:15:59,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2020-10-27 14:15:59,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 224. [2020-10-27 14:15:59,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-27 14:15:59,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 324 transitions. [2020-10-27 14:15:59,668 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 324 transitions. Word has length 57 [2020-10-27 14:15:59,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:59,668 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 324 transitions. [2020-10-27 14:15:59,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:15:59,668 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 324 transitions. [2020-10-27 14:15:59,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 14:15:59,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:59,669 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:59,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:15:59,669 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:59,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:59,670 INFO L82 PathProgramCache]: Analyzing trace with hash -759983614, now seen corresponding path program 13 times [2020-10-27 14:15:59,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:59,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383618386] [2020-10-27 14:15:59,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:59,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:59,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:59,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:00,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:01,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:03,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:03,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 14:16:03,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:16:03,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3823 [2020-10-27 14:16:03,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:03,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:16:03,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:16:03,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 14:16:03,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:03,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:03,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:03,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:03,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:03,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:03,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:03,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:16:03,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:03,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:03,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:03,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:03,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:03,775 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:16:03,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383618386] [2020-10-27 14:16:03,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:03,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:16:03,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952003037] [2020-10-27 14:16:03,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:16:03,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:03,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:16:03,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:16:03,777 INFO L87 Difference]: Start difference. First operand 224 states and 324 transitions. Second operand 19 states. [2020-10-27 14:16:06,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:06,859 INFO L93 Difference]: Finished difference Result 1318 states and 1945 transitions. [2020-10-27 14:16:06,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 14:16:06,860 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 60 [2020-10-27 14:16:06,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:06,867 INFO L225 Difference]: With dead ends: 1318 [2020-10-27 14:16:06,867 INFO L226 Difference]: Without dead ends: 1182 [2020-10-27 14:16:06,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=739, Invalid=1517, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 14:16:06,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2020-10-27 14:16:06,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 236. [2020-10-27 14:16:06,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-10-27 14:16:06,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 342 transitions. [2020-10-27 14:16:06,912 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 342 transitions. Word has length 60 [2020-10-27 14:16:06,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:06,912 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 342 transitions. [2020-10-27 14:16:06,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:16:06,912 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 342 transitions. [2020-10-27 14:16:06,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 14:16:06,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:06,913 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:16:06,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:16:06,914 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:06,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:06,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1690991215, now seen corresponding path program 14 times [2020-10-27 14:16:06,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:06,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449952805] [2020-10-27 14:16:06,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:06,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:06,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:06,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:07,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:08,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:11,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:11,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 14:16:11,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:16:11,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:16:11,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:11,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:16:11,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:16:11,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 14:16:11,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:12,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:12,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:12,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:12,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:12,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:12,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:12,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:16:12,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:12,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:12,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:12,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:12,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:12,305 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:16:12,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449952805] [2020-10-27 14:16:12,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:12,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:16:12,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561961488] [2020-10-27 14:16:12,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:16:12,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:12,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:16:12,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:16:12,312 INFO L87 Difference]: Start difference. First operand 236 states and 342 transitions. Second operand 20 states. [2020-10-27 14:16:15,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:15,922 INFO L93 Difference]: Finished difference Result 1405 states and 2075 transitions. [2020-10-27 14:16:15,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-27 14:16:15,923 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 63 [2020-10-27 14:16:15,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:15,929 INFO L225 Difference]: With dead ends: 1405 [2020-10-27 14:16:15,929 INFO L226 Difference]: Without dead ends: 1263 [2020-10-27 14:16:15,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=836, Invalid=1714, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 14:16:15,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2020-10-27 14:16:15,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 248. [2020-10-27 14:16:15,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-10-27 14:16:15,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 360 transitions. [2020-10-27 14:16:15,974 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 360 transitions. Word has length 63 [2020-10-27 14:16:15,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:15,974 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 360 transitions. [2020-10-27 14:16:15,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:16:15,974 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 360 transitions. [2020-10-27 14:16:15,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 14:16:15,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:15,975 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:16:15,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:16:15,975 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:15,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:15,976 INFO L82 PathProgramCache]: Analyzing trace with hash -439635038, now seen corresponding path program 15 times [2020-10-27 14:16:15,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:15,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225673488] [2020-10-27 14:16:15,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:15,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:15,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:15,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:16,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:17,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:20,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:20,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 14:16:20,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:16:20,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4909 [2020-10-27 14:16:20,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:20,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:16:20,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:16:20,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 14:16:20,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:21,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:21,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:21,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:21,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:21,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:21,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:21,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:16:21,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:21,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:21,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:21,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:21,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:21,239 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:16:21,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225673488] [2020-10-27 14:16:21,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:21,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:16:21,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094072011] [2020-10-27 14:16:21,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:16:21,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:21,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:16:21,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:16:21,242 INFO L87 Difference]: Start difference. First operand 248 states and 360 transitions. Second operand 21 states. [2020-10-27 14:16:25,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:25,322 INFO L93 Difference]: Finished difference Result 1492 states and 2205 transitions. [2020-10-27 14:16:25,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-27 14:16:25,323 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 66 [2020-10-27 14:16:25,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:25,330 INFO L225 Difference]: With dead ends: 1492 [2020-10-27 14:16:25,330 INFO L226 Difference]: Without dead ends: 1344 [2020-10-27 14:16:25,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=939, Invalid=1923, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 14:16:25,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2020-10-27 14:16:25,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 260. [2020-10-27 14:16:25,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-27 14:16:25,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 378 transitions. [2020-10-27 14:16:25,380 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 378 transitions. Word has length 66 [2020-10-27 14:16:25,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:25,381 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 378 transitions. [2020-10-27 14:16:25,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:16:25,381 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 378 transitions. [2020-10-27 14:16:25,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 14:16:25,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:25,382 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:16:25,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:16:25,382 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:25,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:25,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1603895311, now seen corresponding path program 16 times [2020-10-27 14:16:25,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:25,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636805302] [2020-10-27 14:16:25,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:25,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:25,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:25,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:25,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:27,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:30,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:30,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 14:16:30,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:16:30,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:16:30,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:30,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:16:30,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:16:30,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 14:16:30,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:30,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:30,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:30,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:30,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:30,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:30,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:30,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:16:30,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:30,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:30,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:30,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:30,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:30,811 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:16:30,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636805302] [2020-10-27 14:16:30,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:30,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:16:30,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922526492] [2020-10-27 14:16:30,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:16:30,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:30,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:16:30,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:16:30,813 INFO L87 Difference]: Start difference. First operand 260 states and 378 transitions. Second operand 22 states. [2020-10-27 14:16:35,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:35,209 INFO L93 Difference]: Finished difference Result 1579 states and 2335 transitions. [2020-10-27 14:16:35,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-27 14:16:35,211 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 69 [2020-10-27 14:16:35,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:35,218 INFO L225 Difference]: With dead ends: 1579 [2020-10-27 14:16:35,218 INFO L226 Difference]: Without dead ends: 1425 [2020-10-27 14:16:35,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1048, Invalid=2144, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 14:16:35,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2020-10-27 14:16:35,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 272. [2020-10-27 14:16:35,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-27 14:16:35,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 396 transitions. [2020-10-27 14:16:35,271 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 396 transitions. Word has length 69 [2020-10-27 14:16:35,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:35,271 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 396 transitions. [2020-10-27 14:16:35,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:16:35,271 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 396 transitions. [2020-10-27 14:16:35,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 14:16:35,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:35,272 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:16:35,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:16:35,272 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:35,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:35,273 INFO L82 PathProgramCache]: Analyzing trace with hash 74194242, now seen corresponding path program 17 times [2020-10-27 14:16:35,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:35,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073893653] [2020-10-27 14:16:35,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:35,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:35,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:35,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:35,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:37,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:40,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:40,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 14:16:40,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:16:40,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:16:40,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:40,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:16:40,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:16:40,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 14:16:40,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:40,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:40,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:40,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:40,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:40,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:40,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:40,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:16:40,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:40,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:40,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:40,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:40,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:40,716 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:16:40,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073893653] [2020-10-27 14:16:40,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:40,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:16:40,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927877162] [2020-10-27 14:16:40,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:16:40,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:40,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:16:40,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:16:40,718 INFO L87 Difference]: Start difference. First operand 272 states and 396 transitions. Second operand 23 states. [2020-10-27 14:16:45,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:45,113 INFO L93 Difference]: Finished difference Result 1666 states and 2465 transitions. [2020-10-27 14:16:45,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-27 14:16:45,116 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 72 [2020-10-27 14:16:45,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:45,123 INFO L225 Difference]: With dead ends: 1666 [2020-10-27 14:16:45,124 INFO L226 Difference]: Without dead ends: 1506 [2020-10-27 14:16:45,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1163, Invalid=2377, Unknown=0, NotChecked=0, Total=3540 [2020-10-27 14:16:45,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2020-10-27 14:16:45,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 284. [2020-10-27 14:16:45,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-10-27 14:16:45,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 414 transitions. [2020-10-27 14:16:45,185 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 414 transitions. Word has length 72 [2020-10-27 14:16:45,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:45,185 INFO L481 AbstractCegarLoop]: Abstraction has 284 states and 414 transitions. [2020-10-27 14:16:45,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:16:45,186 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 414 transitions. [2020-10-27 14:16:45,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 14:16:45,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:45,187 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:16:45,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:16:45,187 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:45,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:45,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1379257775, now seen corresponding path program 18 times [2020-10-27 14:16:45,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:45,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023754570] [2020-10-27 14:16:45,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:45,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:45,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:45,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:45,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:47,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:50,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:50,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 14:16:50,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:16:50,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:16:50,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:50,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:16:50,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:16:50,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 14:16:50,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:50,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:50,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:50,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:50,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:50,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:50,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:50,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:16:50,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:50,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:50,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:50,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:50,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:50,640 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:16:50,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023754570] [2020-10-27 14:16:50,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:50,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 14:16:50,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830959773] [2020-10-27 14:16:50,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 14:16:50,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:50,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 14:16:50,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:16:50,642 INFO L87 Difference]: Start difference. First operand 284 states and 414 transitions. Second operand 24 states. [2020-10-27 14:16:56,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:56,214 INFO L93 Difference]: Finished difference Result 1753 states and 2595 transitions. [2020-10-27 14:16:56,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-27 14:16:56,215 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 75 [2020-10-27 14:16:56,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:56,221 INFO L225 Difference]: With dead ends: 1753 [2020-10-27 14:16:56,221 INFO L226 Difference]: Without dead ends: 1587 [2020-10-27 14:16:56,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1284, Invalid=2622, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 14:16:56,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2020-10-27 14:16:56,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 296. [2020-10-27 14:16:56,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-10-27 14:16:56,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 432 transitions. [2020-10-27 14:16:56,282 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 432 transitions. Word has length 75 [2020-10-27 14:16:56,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:56,283 INFO L481 AbstractCegarLoop]: Abstraction has 296 states and 432 transitions. [2020-10-27 14:16:56,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 14:16:56,283 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 432 transitions. [2020-10-27 14:16:56,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 14:16:56,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:56,284 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:16:56,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:16:56,284 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:56,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:56,284 INFO L82 PathProgramCache]: Analyzing trace with hash 691982050, now seen corresponding path program 19 times [2020-10-27 14:16:56,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:56,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445091219] [2020-10-27 14:16:56,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:56,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:56,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:56,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:56,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:59,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:01,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:01,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 14:17:01,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:17:01,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 14:17:01,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:01,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 14:17:01,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:17:01,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 14:17:01,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:01,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:17:01,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:01,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:01,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:01,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:17:01,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:01,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:17:01,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:01,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:01,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:01,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:01,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:01,799 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:17:01,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445091219] [2020-10-27 14:17:01,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:17:01,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:17:01,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241259750] [2020-10-27 14:17:01,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:17:01,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:17:01,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:17:01,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=363, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:17:01,801 INFO L87 Difference]: Start difference. First operand 296 states and 432 transitions. Second operand 25 states. [2020-10-27 14:17:07,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:17:07,665 INFO L93 Difference]: Finished difference Result 1840 states and 2725 transitions. [2020-10-27 14:17:07,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-27 14:17:07,666 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 78 [2020-10-27 14:17:07,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:17:07,672 INFO L225 Difference]: With dead ends: 1840 [2020-10-27 14:17:07,673 INFO L226 Difference]: Without dead ends: 1668 [2020-10-27 14:17:07,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1411, Invalid=2879, Unknown=0, NotChecked=0, Total=4290 [2020-10-27 14:17:07,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1668 states. [2020-10-27 14:17:07,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1668 to 308. [2020-10-27 14:17:07,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-10-27 14:17:07,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 450 transitions. [2020-10-27 14:17:07,736 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 450 transitions. Word has length 78 [2020-10-27 14:17:07,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:17:07,736 INFO L481 AbstractCegarLoop]: Abstraction has 308 states and 450 transitions. [2020-10-27 14:17:07,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:17:07,737 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 450 transitions. [2020-10-27 14:17:07,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 14:17:07,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:17:07,738 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:17:07,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:17:07,738 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:17:07,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:17:07,738 INFO L82 PathProgramCache]: Analyzing trace with hash -797533007, now seen corresponding path program 20 times [2020-10-27 14:17:07,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:17:07,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049449766] [2020-10-27 14:17:07,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:17:07,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:07,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:07,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:08,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:10,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:12,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:12,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 14:17:12,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:17:12,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 14:17:12,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:12,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 14:17:12,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:17:12,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 14:17:12,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:13,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:17:13,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:13,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:13,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:13,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:17:13,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:13,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:17:13,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:13,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:13,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:13,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:13,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:13,283 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:17:13,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049449766] [2020-10-27 14:17:13,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:17:13,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 14:17:13,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991120381] [2020-10-27 14:17:13,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 14:17:13,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:17:13,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 14:17:13,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:17:13,285 INFO L87 Difference]: Start difference. First operand 308 states and 450 transitions. Second operand 26 states. [2020-10-27 14:17:19,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:17:19,192 INFO L93 Difference]: Finished difference Result 1927 states and 2855 transitions. [2020-10-27 14:17:19,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-27 14:17:19,194 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 81 [2020-10-27 14:17:19,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:17:19,205 INFO L225 Difference]: With dead ends: 1927 [2020-10-27 14:17:19,205 INFO L226 Difference]: Without dead ends: 1749 [2020-10-27 14:17:19,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1544, Invalid=3148, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 14:17:19,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1749 states. [2020-10-27 14:17:19,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1749 to 320. [2020-10-27 14:17:19,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2020-10-27 14:17:19,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 468 transitions. [2020-10-27 14:17:19,288 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 468 transitions. Word has length 81 [2020-10-27 14:17:19,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:17:19,289 INFO L481 AbstractCegarLoop]: Abstraction has 320 states and 468 transitions. [2020-10-27 14:17:19,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 14:17:19,289 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 468 transitions. [2020-10-27 14:17:19,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 14:17:19,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:17:19,294 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:17:19,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:17:19,294 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:17:19,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:17:19,294 INFO L82 PathProgramCache]: Analyzing trace with hash 661506178, now seen corresponding path program 21 times [2020-10-27 14:17:19,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:17:19,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711648176] [2020-10-27 14:17:19,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:17:19,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:19,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:19,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:19,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:22,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:24,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:24,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 14:17:24,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:17:24,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:17:24,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:24,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:17:24,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:17:24,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 14:17:24,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:24,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:17:24,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:24,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:24,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:24,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:17:24,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:24,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:17:24,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:24,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:24,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:24,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:24,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:24,870 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:17:24,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711648176] [2020-10-27 14:17:24,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:17:24,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:17:24,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589517675] [2020-10-27 14:17:24,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:17:24,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:17:24,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:17:24,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=420, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:17:24,872 INFO L87 Difference]: Start difference. First operand 320 states and 468 transitions. Second operand 27 states. [2020-10-27 14:17:31,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:17:31,401 INFO L93 Difference]: Finished difference Result 2014 states and 2985 transitions. [2020-10-27 14:17:31,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-27 14:17:31,402 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 84 [2020-10-27 14:17:31,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:17:31,409 INFO L225 Difference]: With dead ends: 2014 [2020-10-27 14:17:31,409 INFO L226 Difference]: Without dead ends: 1830 [2020-10-27 14:17:31,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1178 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1683, Invalid=3429, Unknown=0, NotChecked=0, Total=5112 [2020-10-27 14:17:31,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1830 states. [2020-10-27 14:17:31,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1830 to 332. [2020-10-27 14:17:31,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-10-27 14:17:31,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 486 transitions. [2020-10-27 14:17:31,491 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 486 transitions. Word has length 84 [2020-10-27 14:17:31,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:17:31,491 INFO L481 AbstractCegarLoop]: Abstraction has 332 states and 486 transitions. [2020-10-27 14:17:31,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:17:31,492 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 486 transitions. [2020-10-27 14:17:31,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 14:17:31,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:17:31,493 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:17:31,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:17:31,493 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:17:31,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:17:31,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1828830993, now seen corresponding path program 22 times [2020-10-27 14:17:31,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:17:31,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543641850] [2020-10-27 14:17:31,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:17:31,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:31,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:31,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:32,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:34,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:36,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:36,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 14:17:36,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:17:36,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:17:36,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:36,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 14:17:36,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:17:36,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 14:17:36,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:37,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:17:37,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:37,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:37,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:37,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:17:37,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:37,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:17:37,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:37,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:37,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:37,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:37,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:37,132 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:17:37,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543641850] [2020-10-27 14:17:37,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:17:37,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 14:17:37,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493876370] [2020-10-27 14:17:37,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 14:17:37,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:17:37,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 14:17:37,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=450, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:17:37,135 INFO L87 Difference]: Start difference. First operand 332 states and 486 transitions. Second operand 28 states. [2020-10-27 14:17:44,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:17:44,169 INFO L93 Difference]: Finished difference Result 2101 states and 3115 transitions. [2020-10-27 14:17:44,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-10-27 14:17:44,170 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 87 [2020-10-27 14:17:44,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:17:44,179 INFO L225 Difference]: With dead ends: 2101 [2020-10-27 14:17:44,179 INFO L226 Difference]: Without dead ends: 1911 [2020-10-27 14:17:44,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1828, Invalid=3722, Unknown=0, NotChecked=0, Total=5550 [2020-10-27 14:17:44,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2020-10-27 14:17:44,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 344. [2020-10-27 14:17:44,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-10-27 14:17:44,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 504 transitions. [2020-10-27 14:17:44,260 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 504 transitions. Word has length 87 [2020-10-27 14:17:44,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:17:44,260 INFO L481 AbstractCegarLoop]: Abstraction has 344 states and 504 transitions. [2020-10-27 14:17:44,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 14:17:44,260 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 504 transitions. [2020-10-27 14:17:44,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-27 14:17:44,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:17:44,262 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:17:44,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:17:44,262 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:17:44,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:17:44,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1252198946, now seen corresponding path program 23 times [2020-10-27 14:17:44,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:17:44,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646334550] [2020-10-27 14:17:44,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:17:44,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:44,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:44,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:45,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:48,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:49,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:49,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 14:17:49,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:17:49,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:17:49,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:49,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 14:17:49,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:17:49,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 14:17:49,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:49,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:17:49,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:49,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:49,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:49,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:17:49,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:49,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:17:49,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:49,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:49,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:49,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:49,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:49,970 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:17:49,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1646334550] [2020-10-27 14:17:49,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:17:49,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 14:17:49,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873425327] [2020-10-27 14:17:49,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 14:17:49,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:17:49,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 14:17:49,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=481, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:17:49,973 INFO L87 Difference]: Start difference. First operand 344 states and 504 transitions. Second operand 29 states. [2020-10-27 14:17:58,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:17:58,514 INFO L93 Difference]: Finished difference Result 2188 states and 3245 transitions. [2020-10-27 14:17:58,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-10-27 14:17:58,515 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 90 [2020-10-27 14:17:58,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:17:58,525 INFO L225 Difference]: With dead ends: 2188 [2020-10-27 14:17:58,525 INFO L226 Difference]: Without dead ends: 1992 [2020-10-27 14:17:58,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1405 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1979, Invalid=4027, Unknown=0, NotChecked=0, Total=6006 [2020-10-27 14:17:58,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2020-10-27 14:17:58,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 356. [2020-10-27 14:17:58,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2020-10-27 14:17:58,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 522 transitions. [2020-10-27 14:17:58,645 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 522 transitions. Word has length 90 [2020-10-27 14:17:58,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:17:58,645 INFO L481 AbstractCegarLoop]: Abstraction has 356 states and 522 transitions. [2020-10-27 14:17:58,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 14:17:58,645 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 522 transitions. [2020-10-27 14:17:58,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 14:17:58,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:17:58,647 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:17:58,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:17:58,647 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:17:58,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:17:58,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1618896527, now seen corresponding path program 24 times [2020-10-27 14:17:58,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:17:58,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075114201] [2020-10-27 14:17:58,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:17:58,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:58,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:58,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:59,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:03,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:03,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 14:18:03,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:18:03,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:18:03,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:03,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 14:18:03,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:18:03,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 14:18:03,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:04,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:18:04,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:04,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:04,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:04,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:18:04,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:04,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:18:04,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:04,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:04,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:04,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:04,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:04,411 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:18:04,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075114201] [2020-10-27 14:18:04,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:18:04,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 14:18:04,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110607370] [2020-10-27 14:18:04,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 14:18:04,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:18:04,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 14:18:04,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:18:04,413 INFO L87 Difference]: Start difference. First operand 356 states and 522 transitions. Second operand 30 states. [2020-10-27 14:18:13,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:18:13,773 INFO L93 Difference]: Finished difference Result 2275 states and 3375 transitions. [2020-10-27 14:18:13,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-10-27 14:18:13,774 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 93 [2020-10-27 14:18:13,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:18:13,785 INFO L225 Difference]: With dead ends: 2275 [2020-10-27 14:18:13,785 INFO L226 Difference]: Without dead ends: 2073 [2020-10-27 14:18:13,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1526 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2136, Invalid=4344, Unknown=0, NotChecked=0, Total=6480 [2020-10-27 14:18:13,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2073 states. [2020-10-27 14:18:13,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2073 to 368. [2020-10-27 14:18:13,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 368 states. [2020-10-27 14:18:13,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 540 transitions. [2020-10-27 14:18:13,868 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 540 transitions. Word has length 93 [2020-10-27 14:18:13,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:18:13,868 INFO L481 AbstractCegarLoop]: Abstraction has 368 states and 540 transitions. [2020-10-27 14:18:13,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 14:18:13,868 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 540 transitions. [2020-10-27 14:18:13,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-27 14:18:13,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:13,870 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:18:13,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:18:13,870 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:13,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:13,871 INFO L82 PathProgramCache]: Analyzing trace with hash -150432830, now seen corresponding path program 25 times [2020-10-27 14:18:13,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:13,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850348197] [2020-10-27 14:18:13,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:13,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:13,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:13,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:14,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:16,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:18,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:18,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-27 14:18:18,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:18:18,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-27 14:18:18,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:18,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 14:18:18,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:18:18,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 14:18:18,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:19,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:18:19,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:19,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:19,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:19,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:18:19,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:19,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:18:19,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:19,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:19,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:19,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:19,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:19,744 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:18:19,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850348197] [2020-10-27 14:18:19,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:18:19,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 14:18:19,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059406512] [2020-10-27 14:18:19,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 14:18:19,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:18:19,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 14:18:19,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=546, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:18:19,746 INFO L87 Difference]: Start difference. First operand 368 states and 540 transitions. Second operand 31 states. [2020-10-27 14:18:30,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:18:30,040 INFO L93 Difference]: Finished difference Result 2362 states and 3505 transitions. [2020-10-27 14:18:30,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-10-27 14:18:30,041 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 96 [2020-10-27 14:18:30,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:18:30,047 INFO L225 Difference]: With dead ends: 2362 [2020-10-27 14:18:30,047 INFO L226 Difference]: Without dead ends: 2154 [2020-10-27 14:18:30,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2299, Invalid=4673, Unknown=0, NotChecked=0, Total=6972 [2020-10-27 14:18:30,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2020-10-27 14:18:30,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 380. [2020-10-27 14:18:30,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 380 states. [2020-10-27 14:18:30,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 558 transitions. [2020-10-27 14:18:30,152 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 558 transitions. Word has length 96 [2020-10-27 14:18:30,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:18:30,152 INFO L481 AbstractCegarLoop]: Abstraction has 380 states and 558 transitions. [2020-10-27 14:18:30,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 14:18:30,152 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 558 transitions. [2020-10-27 14:18:30,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 14:18:30,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:30,154 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:18:30,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 14:18:30,154 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:30,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:30,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1685312559, now seen corresponding path program 26 times [2020-10-27 14:18:30,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:30,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038656247] [2020-10-27 14:18:30,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:30,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:30,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:30,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:31,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:34,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:35,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:35,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 14:18:35,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:18:35,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 14:18:35,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:35,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 14:18:35,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:18:35,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-27 14:18:35,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:36,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:18:36,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:36,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:36,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:36,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:18:36,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:36,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:18:36,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:36,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:36,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:36,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:36,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:36,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:18:36,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038656247] [2020-10-27 14:18:36,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:18:36,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 14:18:36,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557376264] [2020-10-27 14:18:36,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 14:18:36,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:18:36,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 14:18:36,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=580, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:18:36,089 INFO L87 Difference]: Start difference. First operand 380 states and 558 transitions. Second operand 32 states.