/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label58.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 20:55:06,103 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 20:55:06,107 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 20:55:06,186 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 20:55:06,187 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 20:55:06,194 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 20:55:06,197 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 20:55:06,203 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 20:55:06,208 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 20:55:06,214 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 20:55:06,216 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 20:55:06,218 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 20:55:06,218 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 20:55:06,222 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 20:55:06,226 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 20:55:06,228 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 20:55:06,229 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 20:55:06,233 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 20:55:06,240 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 20:55:06,249 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 20:55:06,251 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 20:55:06,253 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 20:55:06,254 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 20:55:06,257 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 20:55:06,279 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 20:55:06,280 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 20:55:06,280 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 20:55:06,283 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 20:55:06,283 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 20:55:06,285 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 20:55:06,285 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 20:55:06,286 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 20:55:06,288 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 20:55:06,289 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 20:55:06,290 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 20:55:06,291 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 20:55:06,292 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 20:55:06,292 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 20:55:06,292 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 20:55:06,293 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 20:55:06,294 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 20:55:06,301 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 20:55:06,357 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 20:55:06,357 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 20:55:06,361 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 20:55:06,362 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 20:55:06,362 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 20:55:06,362 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 20:55:06,362 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 20:55:06,363 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 20:55:06,363 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 20:55:06,363 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 20:55:06,364 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 20:55:06,364 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 20:55:06,365 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 20:55:06,365 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 20:55:06,365 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 20:55:06,365 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 20:55:06,365 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 20:55:06,366 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 20:55:06,366 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 20:55:06,366 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 20:55:06,366 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 20:55:06,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:55:06,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 20:55:06,367 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 20:55:06,367 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 20:55:06,367 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 20:55:06,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 20:55:06,368 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 20:55:06,368 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 20:55:06,368 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 20:55:06,825 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 20:55:06,855 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 20:55:06,859 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 20:55:06,860 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 20:55:06,861 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 20:55:06,862 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label58.c [2020-10-26 20:55:06,952 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/15e36e736/f5e3dd6f13674bb2b1e8ce957e24c0ef/FLAGf8960c558 [2020-10-26 20:55:07,748 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 20:55:07,749 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem03_label58.c [2020-10-26 20:55:07,767 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/15e36e736/f5e3dd6f13674bb2b1e8ce957e24c0ef/FLAGf8960c558 [2020-10-26 20:55:07,939 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/15e36e736/f5e3dd6f13674bb2b1e8ce957e24c0ef [2020-10-26 20:55:07,943 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 20:55:07,952 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 20:55:07,956 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 20:55:07,956 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 20:55:07,961 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 20:55:07,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:55:07" (1/1) ... [2020-10-26 20:55:07,978 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47f995c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:07, skipping insertion in model container [2020-10-26 20:55:07,978 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:55:07" (1/1) ... [2020-10-26 20:55:07,988 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 20:55:08,078 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 20:55:08,887 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:55:08,907 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 20:55:09,231 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:55:09,257 INFO L208 MainTranslator]: Completed translation [2020-10-26 20:55:09,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:09 WrapperNode [2020-10-26 20:55:09,259 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 20:55:09,260 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 20:55:09,260 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 20:55:09,260 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 20:55:09,275 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:09" (1/1) ... [2020-10-26 20:55:09,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:09" (1/1) ... [2020-10-26 20:55:09,345 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:09" (1/1) ... [2020-10-26 20:55:09,346 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:09" (1/1) ... [2020-10-26 20:55:09,448 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:09" (1/1) ... [2020-10-26 20:55:09,480 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:09" (1/1) ... [2020-10-26 20:55:09,501 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:09" (1/1) ... [2020-10-26 20:55:09,520 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 20:55:09,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 20:55:09,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 20:55:09,523 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 20:55:09,524 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:09" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:55:09,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 20:55:09,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 20:55:09,615 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 20:55:09,615 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 20:55:09,615 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 20:55:09,616 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 20:55:09,616 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 20:55:09,617 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 20:55:09,617 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 20:55:09,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 20:55:09,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 20:55:09,618 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 20:55:09,619 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 20:55:09,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 20:55:09,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 20:55:09,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 20:55:09,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 20:55:09,621 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 20:55:09,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 20:55:11,956 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 20:55:11,957 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 20:55:11,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:55:11 BoogieIcfgContainer [2020-10-26 20:55:11,959 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 20:55:11,961 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 20:55:11,961 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 20:55:11,965 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 20:55:11,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:55:07" (1/3) ... [2020-10-26 20:55:11,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@96a199d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:55:11, skipping insertion in model container [2020-10-26 20:55:11,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:55:09" (2/3) ... [2020-10-26 20:55:11,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@96a199d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:55:11, skipping insertion in model container [2020-10-26 20:55:11,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:55:11" (3/3) ... [2020-10-26 20:55:11,969 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label58.c [2020-10-26 20:55:11,982 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 20:55:11,988 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 20:55:12,002 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 20:55:12,033 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 20:55:12,033 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 20:55:12,034 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 20:55:12,034 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 20:55:12,034 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 20:55:12,034 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 20:55:12,034 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 20:55:12,034 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 20:55:12,060 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states. [2020-10-26 20:55:12,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-26 20:55:12,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:55:12,078 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:55:12,079 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:55:12,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:55:12,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1227659836, now seen corresponding path program 1 times [2020-10-26 20:55:12,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:55:12,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135053701] [2020-10-26 20:55:12,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:55:12,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:12,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:13,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:17,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:17,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-26 20:55:17,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:55:17,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4447 [2020-10-26 20:55:17,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:17,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 20:55:17,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:55:17,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-26 20:55:17,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 20:55:18,281 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2020-10-26 20:55:18,504 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2020-10-26 20:55:18,836 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2020-10-26 20:55:19,058 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-10-26 20:55:19,246 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2020-10-26 20:55:19,560 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:55:19,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:55:19,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:19,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:19,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:19,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:55:19,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:55:19,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-26 20:55:19,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:19,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:55:19,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:55:19,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:55:19,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:20,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:55:20,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135053701] [2020-10-26 20:55:20,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:55:20,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-26 20:55:20,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348933544] [2020-10-26 20:55:20,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 20:55:20,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:55:20,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 20:55:20,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:55:20,441 INFO L87 Difference]: Start difference. First operand 315 states. Second operand 12 states. [2020-10-26 20:55:21,026 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-26 20:55:22,089 WARN L193 SmtUtils]: Spent 959.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 196 [2020-10-26 20:55:23,142 WARN L193 SmtUtils]: Spent 988.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 196 [2020-10-26 20:55:24,260 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 212 DAG size of output: 204 [2020-10-26 20:55:26,017 WARN L193 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 225 DAG size of output: 203 [2020-10-26 20:55:28,076 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 225 DAG size of output: 202 [2020-10-26 20:55:29,791 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 228 DAG size of output: 201 [2020-10-26 20:55:33,272 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 229 DAG size of output: 200 [2020-10-26 20:55:34,602 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 231 DAG size of output: 198 [2020-10-26 20:55:37,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:55:37,717 INFO L93 Difference]: Finished difference Result 742 states and 1293 transitions. [2020-10-26 20:55:37,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:55:37,720 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 167 [2020-10-26 20:55:37,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:55:37,738 INFO L225 Difference]: With dead ends: 742 [2020-10-26 20:55:37,738 INFO L226 Difference]: Without dead ends: 365 [2020-10-26 20:55:37,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2020-10-26 20:55:37,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-10-26 20:55:37,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2020-10-26 20:55:37,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-10-26 20:55:37,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 526 transitions. [2020-10-26 20:55:37,861 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 526 transitions. Word has length 167 [2020-10-26 20:55:37,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:55:37,866 INFO L481 AbstractCegarLoop]: Abstraction has 365 states and 526 transitions. [2020-10-26 20:55:37,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 20:55:37,867 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 526 transitions. [2020-10-26 20:55:37,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-26 20:55:37,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:55:37,887 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:55:37,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 20:55:37,889 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:55:37,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:55:37,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1369769527, now seen corresponding path program 1 times [2020-10-26 20:55:37,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:55:37,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464313737] [2020-10-26 20:55:37,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:55:38,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:38,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:38,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:41,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:41,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 190 [2020-10-26 20:55:41,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:55:41,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3725 [2020-10-26 20:55:41,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:41,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 20:55:41,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:55:41,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 163 [2020-10-26 20:55:41,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:55:42,826 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 74 [2020-10-26 20:55:43,417 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:55:43,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:55:43,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:43,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:43,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:43,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:55:43,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:55:43,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 20:55:43,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:43,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:55:43,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:55:43,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:55:43,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:43,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:55:43,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:43,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:43,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:43,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:55:43,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:55:43,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-26 20:55:43,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:43,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:55:43,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:55:43,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:55:43,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:44,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:55:44,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464313737] [2020-10-26 20:55:44,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:55:44,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 20:55:44,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508887892] [2020-10-26 20:55:44,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 20:55:44,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:55:44,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 20:55:44,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-26 20:55:44,482 INFO L87 Difference]: Start difference. First operand 365 states and 526 transitions. Second operand 16 states. [2020-10-26 20:55:44,914 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-26 20:55:45,447 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 71 [2020-10-26 20:55:45,741 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 61 [2020-10-26 20:55:46,084 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2020-10-26 20:55:47,107 WARN L193 SmtUtils]: Spent 967.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 198 [2020-10-26 20:55:48,231 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 214 DAG size of output: 206 [2020-10-26 20:55:49,966 WARN L193 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 225 DAG size of output: 205 [2020-10-26 20:55:50,500 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2020-10-26 20:55:52,833 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 230 DAG size of output: 204 [2020-10-26 20:55:56,378 WARN L193 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 231 DAG size of output: 203 [2020-10-26 20:56:00,929 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 232 DAG size of output: 202 [2020-10-26 20:56:02,330 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 232 DAG size of output: 200 [2020-10-26 20:56:06,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:56:06,317 INFO L93 Difference]: Finished difference Result 984 states and 1591 transitions. [2020-10-26 20:56:06,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 20:56:06,318 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 178 [2020-10-26 20:56:06,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:56:06,325 INFO L225 Difference]: With dead ends: 984 [2020-10-26 20:56:06,325 INFO L226 Difference]: Without dead ends: 740 [2020-10-26 20:56:06,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2020-10-26 20:56:06,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2020-10-26 20:56:06,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 732. [2020-10-26 20:56:06,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 732 states. [2020-10-26 20:56:06,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 986 transitions. [2020-10-26 20:56:06,389 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 986 transitions. Word has length 178 [2020-10-26 20:56:06,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:56:06,390 INFO L481 AbstractCegarLoop]: Abstraction has 732 states and 986 transitions. [2020-10-26 20:56:06,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 20:56:06,390 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 986 transitions. [2020-10-26 20:56:06,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-10-26 20:56:06,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:56:06,394 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:56:06,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 20:56:06,395 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:56:06,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:56:06,395 INFO L82 PathProgramCache]: Analyzing trace with hash 563461387, now seen corresponding path program 1 times [2020-10-26 20:56:06,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:56:06,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783349885] [2020-10-26 20:56:06,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:56:06,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:06,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:06,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:08,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:08,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-10-26 20:56:08,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:56:08,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1732 [2020-10-26 20:56:08,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:08,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:56:08,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:56:08,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 191 [2020-10-26 20:56:08,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:08,634 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:56:08,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:56:08,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:08,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:08,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:08,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:56:08,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:08,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 20:56:08,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:08,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:56:08,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:56:08,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:56:08,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:56:08,819 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:56:08,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:56:08,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:08,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:08,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:08,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:08,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:56:08,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:56:08,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-26 20:56:08,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:08,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:56:08,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:56:08,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:56:08,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:09,176 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 20:56:09,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783349885] [2020-10-26 20:56:09,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:56:09,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:56:09,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044879346] [2020-10-26 20:56:09,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:56:09,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:56:09,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:56:09,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:56:09,185 INFO L87 Difference]: Start difference. First operand 732 states and 986 transitions. Second operand 6 states. [2020-10-26 20:56:09,448 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:56:12,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:56:12,570 INFO L93 Difference]: Finished difference Result 1799 states and 2551 transitions. [2020-10-26 20:56:12,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:56:12,571 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 188 [2020-10-26 20:56:12,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:56:12,580 INFO L225 Difference]: With dead ends: 1799 [2020-10-26 20:56:12,580 INFO L226 Difference]: Without dead ends: 1188 [2020-10-26 20:56:12,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:56:12,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2020-10-26 20:56:12,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 1168. [2020-10-26 20:56:12,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1168 states. [2020-10-26 20:56:12,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 1629 transitions. [2020-10-26 20:56:12,629 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 1629 transitions. Word has length 188 [2020-10-26 20:56:12,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:56:12,630 INFO L481 AbstractCegarLoop]: Abstraction has 1168 states and 1629 transitions. [2020-10-26 20:56:12,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:56:12,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 1629 transitions. [2020-10-26 20:56:12,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-26 20:56:12,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:56:12,635 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:56:12,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 20:56:12,635 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:56:12,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:56:12,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1774024460, now seen corresponding path program 1 times [2020-10-26 20:56:12,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:56:12,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233867785] [2020-10-26 20:56:12,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:56:12,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:12,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:12,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:13,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:15,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:16,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:16,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 211 [2020-10-26 20:56:16,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:56:16,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3764 [2020-10-26 20:56:16,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:16,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:56:16,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:56:16,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 20:56:16,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:16,806 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:56:16,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:56:16,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:16,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:16,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:16,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:56:16,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:16,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 20:56:16,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:16,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:56:16,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:56:16,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:56:16,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:16,965 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:56:16,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:56:16,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:16,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:17,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:17,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:56:17,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:17,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-26 20:56:17,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:17,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:56:17,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:56:17,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:56:17,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:17,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:56:17,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:17,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:17,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:17,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 20:56:17,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:17,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 20:56:17,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:17,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:56:17,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:56:17,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 20:56:17,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:17,215 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:56:17,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233867785] [2020-10-26 20:56:17,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:56:17,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:56:17,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486558100] [2020-10-26 20:56:17,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:56:17,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:56:17,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:56:17,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:56:17,218 INFO L87 Difference]: Start difference. First operand 1168 states and 1629 transitions. Second operand 8 states. [2020-10-26 20:56:17,491 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:56:21,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:56:21,288 INFO L93 Difference]: Finished difference Result 2719 states and 3995 transitions. [2020-10-26 20:56:21,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 20:56:21,289 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 197 [2020-10-26 20:56:21,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:56:21,306 INFO L225 Difference]: With dead ends: 2719 [2020-10-26 20:56:21,306 INFO L226 Difference]: Without dead ends: 2250 [2020-10-26 20:56:21,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:56:21,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2250 states. [2020-10-26 20:56:21,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2250 to 2211. [2020-10-26 20:56:21,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2211 states. [2020-10-26 20:56:21,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2211 states to 2211 states and 3139 transitions. [2020-10-26 20:56:21,423 INFO L78 Accepts]: Start accepts. Automaton has 2211 states and 3139 transitions. Word has length 197 [2020-10-26 20:56:21,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:56:21,424 INFO L481 AbstractCegarLoop]: Abstraction has 2211 states and 3139 transitions. [2020-10-26 20:56:21,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:56:21,424 INFO L276 IsEmpty]: Start isEmpty. Operand 2211 states and 3139 transitions. [2020-10-26 20:56:21,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-10-26 20:56:21,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:56:21,434 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:56:21,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 20:56:21,435 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:56:21,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:56:21,436 INFO L82 PathProgramCache]: Analyzing trace with hash 2065378448, now seen corresponding path program 1 times [2020-10-26 20:56:21,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:56:21,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250579371] [2020-10-26 20:56:21,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:56:21,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:21,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:21,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:22,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:24,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:24,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 213 [2020-10-26 20:56:24,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:56:24,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2715 [2020-10-26 20:56:24,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:24,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 20:56:24,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:56:24,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 204 [2020-10-26 20:56:24,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:24,595 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:56:24,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:56:24,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:24,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:24,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:24,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:56:24,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:24,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 20:56:24,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:24,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:56:24,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:56:24,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:56:24,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:24,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:56:24,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:24,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:24,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:24,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:56:24,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:24,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-26 20:56:24,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:24,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:56:24,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:56:24,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:56:24,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:24,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:56:24,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:24,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:24,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:24,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:56:24,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:24,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-26 20:56:24,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:24,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:56:24,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:56:24,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:56:24,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:25,046 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:56:25,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250579371] [2020-10-26 20:56:25,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:56:25,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:56:25,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614485584] [2020-10-26 20:56:25,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 20:56:25,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:56:25,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 20:56:25,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-26 20:56:25,049 INFO L87 Difference]: Start difference. First operand 2211 states and 3139 transitions. Second operand 9 states. [2020-10-26 20:56:25,319 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:56:25,690 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:56:27,648 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:56:32,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:56:32,277 INFO L93 Difference]: Finished difference Result 5832 states and 9294 transitions. [2020-10-26 20:56:32,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 20:56:32,278 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 199 [2020-10-26 20:56:32,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:56:32,311 INFO L225 Difference]: With dead ends: 5832 [2020-10-26 20:56:32,311 INFO L226 Difference]: Without dead ends: 4895 [2020-10-26 20:56:32,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2020-10-26 20:56:32,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4895 states. [2020-10-26 20:56:32,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4895 to 4853. [2020-10-26 20:56:32,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4853 states. [2020-10-26 20:56:32,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4853 states to 4853 states and 7330 transitions. [2020-10-26 20:56:32,493 INFO L78 Accepts]: Start accepts. Automaton has 4853 states and 7330 transitions. Word has length 199 [2020-10-26 20:56:32,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:56:32,494 INFO L481 AbstractCegarLoop]: Abstraction has 4853 states and 7330 transitions. [2020-10-26 20:56:32,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 20:56:32,494 INFO L276 IsEmpty]: Start isEmpty. Operand 4853 states and 7330 transitions. [2020-10-26 20:56:32,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-10-26 20:56:32,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:56:32,508 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:56:32,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 20:56:32,509 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:56:32,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:56:32,509 INFO L82 PathProgramCache]: Analyzing trace with hash 2114809116, now seen corresponding path program 1 times [2020-10-26 20:56:32,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:56:32,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376404604] [2020-10-26 20:56:32,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:56:32,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:32,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:32,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:34,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:35,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:35,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-10-26 20:56:35,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:56:35,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2912 [2020-10-26 20:56:35,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:35,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:56:35,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:56:35,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 20:56:35,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:56:35,772 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:56:35,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:56:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:35,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:35,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:35,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:56:35,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:35,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 20:56:35,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:35,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:56:35,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:56:35,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:56:35,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:35,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:56:35,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:35,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:35,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:35,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:35,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:56:35,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:56:35,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-26 20:56:35,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:35,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:56:35,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:56:35,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:56:35,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:36,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:56:36,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:36,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:36,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:36,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 20:56:36,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:36,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-26 20:56:36,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:36,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:56:36,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:56:36,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 20:56:36,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:36,234 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:56:36,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376404604] [2020-10-26 20:56:36,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:56:36,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:56:36,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895637] [2020-10-26 20:56:36,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:56:36,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:56:36,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:56:36,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:56:36,242 INFO L87 Difference]: Start difference. First operand 4853 states and 7330 transitions. Second operand 8 states. [2020-10-26 20:56:36,507 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:56:38,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:56:38,818 INFO L93 Difference]: Finished difference Result 8360 states and 13014 transitions. [2020-10-26 20:56:38,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:56:38,822 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 205 [2020-10-26 20:56:38,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:56:38,846 INFO L225 Difference]: With dead ends: 8360 [2020-10-26 20:56:38,847 INFO L226 Difference]: Without dead ends: 4781 [2020-10-26 20:56:38,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:56:38,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4781 states. [2020-10-26 20:56:38,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4781 to 4769. [2020-10-26 20:56:38,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4769 states. [2020-10-26 20:56:39,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4769 states to 4769 states and 6942 transitions. [2020-10-26 20:56:39,012 INFO L78 Accepts]: Start accepts. Automaton has 4769 states and 6942 transitions. Word has length 205 [2020-10-26 20:56:39,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:56:39,013 INFO L481 AbstractCegarLoop]: Abstraction has 4769 states and 6942 transitions. [2020-10-26 20:56:39,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:56:39,013 INFO L276 IsEmpty]: Start isEmpty. Operand 4769 states and 6942 transitions. [2020-10-26 20:56:39,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-10-26 20:56:39,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:56:39,023 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:56:39,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 20:56:39,024 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:56:39,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:56:39,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1963365477, now seen corresponding path program 1 times [2020-10-26 20:56:39,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:56:39,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628082067] [2020-10-26 20:56:39,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:56:39,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:39,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:39,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:40,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:42,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:42,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-10-26 20:56:42,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:56:42,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3477 [2020-10-26 20:56:42,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:42,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:56:42,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:56:42,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 20:56:42,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-26 20:56:42,862 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:56:42,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:56:42,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:42,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:42,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:42,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:56:42,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:42,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 20:56:42,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:42,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:56:42,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:56:42,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:56:42,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:42,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:56:43,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:43,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:43,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:43,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:43,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:56:43,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:56:43,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-26 20:56:43,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:43,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:56:43,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:56:43,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:56:43,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:43,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:56:43,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:43,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:43,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:43,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:56:43,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:43,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-26 20:56:43,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:43,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:56:43,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:56:43,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 20:56:43,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:43,374 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:56:43,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628082067] [2020-10-26 20:56:43,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:56:43,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:56:43,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004422100] [2020-10-26 20:56:43,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:56:43,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:56:43,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:56:43,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:56:43,376 INFO L87 Difference]: Start difference. First operand 4769 states and 6942 transitions. Second operand 8 states. [2020-10-26 20:56:43,649 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:56:45,713 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:56:47,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:56:47,537 INFO L93 Difference]: Finished difference Result 11776 states and 17731 transitions. [2020-10-26 20:56:47,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:56:47,537 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 233 [2020-10-26 20:56:47,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:56:47,576 INFO L225 Difference]: With dead ends: 11776 [2020-10-26 20:56:47,576 INFO L226 Difference]: Without dead ends: 7128 [2020-10-26 20:56:47,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-26 20:56:47,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7128 states. [2020-10-26 20:56:47,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7128 to 7034. [2020-10-26 20:56:47,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7034 states. [2020-10-26 20:56:47,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7034 states to 7034 states and 10437 transitions. [2020-10-26 20:56:47,822 INFO L78 Accepts]: Start accepts. Automaton has 7034 states and 10437 transitions. Word has length 233 [2020-10-26 20:56:47,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:56:47,823 INFO L481 AbstractCegarLoop]: Abstraction has 7034 states and 10437 transitions. [2020-10-26 20:56:47,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:56:47,823 INFO L276 IsEmpty]: Start isEmpty. Operand 7034 states and 10437 transitions. [2020-10-26 20:56:47,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-10-26 20:56:47,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:56:47,838 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:56:47,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 20:56:47,839 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:56:47,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:56:47,839 INFO L82 PathProgramCache]: Analyzing trace with hash -121952453, now seen corresponding path program 1 times [2020-10-26 20:56:47,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:56:47,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949877648] [2020-10-26 20:56:47,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:56:47,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:47,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:48,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:48,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:50,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:52,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:52,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 250 [2020-10-26 20:56:52,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:56:52,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4929 [2020-10-26 20:56:52,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:52,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 20:56:52,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:56:52,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-26 20:56:52,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:53,104 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:56:53,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:56:53,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:53,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:53,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:53,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:56:53,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:53,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 20:56:53,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:53,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:56:53,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:56:53,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:56:53,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:53,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:56:53,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:53,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:53,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:53,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:56:53,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:53,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-26 20:56:53,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:53,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:56:53,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:56:53,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:56:53,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:53,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:56:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:53,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:53,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:53,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:56:53,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:53,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-26 20:56:53,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:53,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:56:53,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:56:53,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:56:53,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:53,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 20:56:53,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:56:53,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:56:53,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:56:53,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 20:56:53,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:56:53,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-26 20:56:53,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:56:53,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:56:53,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:56:53,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 20:56:53,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:56:53,636 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 87 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 20:56:53,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949877648] [2020-10-26 20:56:53,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:56:53,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 20:56:53,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151408986] [2020-10-26 20:56:53,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 20:56:53,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:56:53,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 20:56:53,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:56:53,639 INFO L87 Difference]: Start difference. First operand 7034 states and 10437 transitions. Second operand 10 states. [2020-10-26 20:56:53,880 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:56:54,262 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:56:55,990 WARN L193 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 160 [2020-10-26 20:56:59,561 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:57:01,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:57:01,508 INFO L93 Difference]: Finished difference Result 14846 states and 23280 transitions. [2020-10-26 20:57:01,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 20:57:01,509 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 234 [2020-10-26 20:57:01,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:57:01,566 INFO L225 Difference]: With dead ends: 14846 [2020-10-26 20:57:01,567 INFO L226 Difference]: Without dead ends: 7933 [2020-10-26 20:57:01,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2020-10-26 20:57:01,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7933 states. [2020-10-26 20:57:01,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7933 to 7703. [2020-10-26 20:57:01,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7703 states. [2020-10-26 20:57:01,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7703 states to 7703 states and 11380 transitions. [2020-10-26 20:57:01,867 INFO L78 Accepts]: Start accepts. Automaton has 7703 states and 11380 transitions. Word has length 234 [2020-10-26 20:57:01,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:57:01,868 INFO L481 AbstractCegarLoop]: Abstraction has 7703 states and 11380 transitions. [2020-10-26 20:57:01,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 20:57:01,868 INFO L276 IsEmpty]: Start isEmpty. Operand 7703 states and 11380 transitions. [2020-10-26 20:57:01,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-10-26 20:57:01,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:57:01,884 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:57:01,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 20:57:01,885 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:57:01,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:57:01,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1759973322, now seen corresponding path program 1 times [2020-10-26 20:57:01,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:57:01,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746257539] [2020-10-26 20:57:01,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:57:01,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:01,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:02,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:03,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:03,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:06,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:06,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 260 [2020-10-26 20:57:06,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:57:06,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4634 [2020-10-26 20:57:06,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:06,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:57:06,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:57:06,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-26 20:57:06,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:06,914 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:57:06,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:57:06,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:06,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:06,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:06,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:57:06,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:06,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 20:57:06,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:06,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:57:06,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:57:06,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:57:06,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:07,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:57:07,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:07,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:07,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:07,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:57:07,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:07,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-26 20:57:07,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:07,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:57:07,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:57:07,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:57:07,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:07,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:57:07,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:07,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:07,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:07,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:57:07,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:07,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-26 20:57:07,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:07,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:57:07,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:57:07,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:57:07,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:07,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 20:57:07,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:07,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:07,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:07,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:57:07,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:07,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-26 20:57:07,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:07,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:57:07,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:57:07,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 20:57:07,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:07,513 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 94 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-26 20:57:07,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746257539] [2020-10-26 20:57:07,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:57:07,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 20:57:07,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021438696] [2020-10-26 20:57:07,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 20:57:07,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:57:07,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 20:57:07,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-26 20:57:07,516 INFO L87 Difference]: Start difference. First operand 7703 states and 11380 transitions. Second operand 9 states. [2020-10-26 20:57:08,053 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:57:08,807 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:57:10,637 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:57:16,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:57:16,106 INFO L93 Difference]: Finished difference Result 33691 states and 57771 transitions. [2020-10-26 20:57:16,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 20:57:16,106 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 244 [2020-10-26 20:57:16,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:57:16,327 INFO L225 Difference]: With dead ends: 33691 [2020-10-26 20:57:16,327 INFO L226 Difference]: Without dead ends: 26031 [2020-10-26 20:57:16,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2020-10-26 20:57:16,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26031 states. [2020-10-26 20:57:17,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26031 to 25354. [2020-10-26 20:57:17,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25354 states. [2020-10-26 20:57:17,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25354 states to 25354 states and 35416 transitions. [2020-10-26 20:57:17,205 INFO L78 Accepts]: Start accepts. Automaton has 25354 states and 35416 transitions. Word has length 244 [2020-10-26 20:57:17,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:57:17,206 INFO L481 AbstractCegarLoop]: Abstraction has 25354 states and 35416 transitions. [2020-10-26 20:57:17,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 20:57:17,206 INFO L276 IsEmpty]: Start isEmpty. Operand 25354 states and 35416 transitions. [2020-10-26 20:57:17,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-10-26 20:57:17,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:57:17,262 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:57:17,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 20:57:17,262 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:57:17,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:57:17,263 INFO L82 PathProgramCache]: Analyzing trace with hash -328062329, now seen corresponding path program 1 times [2020-10-26 20:57:17,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:57:17,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245755639] [2020-10-26 20:57:17,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:57:17,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:17,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:17,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:19,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:22,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:22,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:22,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-26 20:57:22,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:57:22,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5090 [2020-10-26 20:57:22,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:22,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:57:22,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:57:22,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 20:57:22,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:22,700 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:57:22,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:57:22,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:22,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:22,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:22,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:57:22,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:22,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 20:57:22,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:22,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:57:22,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:57:22,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:57:22,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:22,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:57:22,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:22,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:22,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:22,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:57:22,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:22,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-26 20:57:22,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:22,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:57:22,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:57:22,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:57:22,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:23,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 20:57:23,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:23,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:23,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:23,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 20:57:23,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:23,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-26 20:57:23,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:23,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:57:23,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-26 20:57:23,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:57:23,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:23,204 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 88 proven. 27 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 20:57:23,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245755639] [2020-10-26 20:57:23,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:57:23,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:57:23,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103139081] [2020-10-26 20:57:23,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:57:23,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:57:23,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:57:23,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:57:23,207 INFO L87 Difference]: Start difference. First operand 25354 states and 35416 transitions. Second operand 7 states. [2020-10-26 20:57:23,504 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:57:25,925 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-26 20:57:27,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:57:27,552 INFO L93 Difference]: Finished difference Result 57900 states and 81536 transitions. [2020-10-26 20:57:27,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:57:27,553 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 261 [2020-10-26 20:57:27,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:57:27,679 INFO L225 Difference]: With dead ends: 57900 [2020-10-26 20:57:27,679 INFO L226 Difference]: Without dead ends: 32667 [2020-10-26 20:57:27,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:57:27,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32667 states. [2020-10-26 20:57:28,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32667 to 32587. [2020-10-26 20:57:28,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32587 states. [2020-10-26 20:57:28,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32587 states to 32587 states and 46028 transitions. [2020-10-26 20:57:28,610 INFO L78 Accepts]: Start accepts. Automaton has 32587 states and 46028 transitions. Word has length 261 [2020-10-26 20:57:28,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:57:28,610 INFO L481 AbstractCegarLoop]: Abstraction has 32587 states and 46028 transitions. [2020-10-26 20:57:28,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:57:28,611 INFO L276 IsEmpty]: Start isEmpty. Operand 32587 states and 46028 transitions. [2020-10-26 20:57:28,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2020-10-26 20:57:28,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:57:28,689 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:57:28,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 20:57:28,689 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:57:28,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:57:28,690 INFO L82 PathProgramCache]: Analyzing trace with hash 353611143, now seen corresponding path program 1 times [2020-10-26 20:57:28,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:57:28,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818901535] [2020-10-26 20:57:28,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:57:28,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:28,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:28,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:29,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:32,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:33,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:33,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:33,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 282 [2020-10-26 20:57:33,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:57:33,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 20:57:33,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:33,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:57:33,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:57:33,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-26 20:57:33,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:34,001 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:57:34,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:57:34,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:34,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:34,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:34,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:57:34,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:34,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 20:57:34,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:34,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:57:34,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:57:34,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:57:34,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:34,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:57:34,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:34,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:34,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:34,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:57:34,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:34,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-26 20:57:34,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:34,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:57:34,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:57:34,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:57:34,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:34,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:57:34,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:34,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:34,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:34,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-26 20:57:34,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:34,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-26 20:57:34,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:34,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:57:34,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:57:34,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 20:57:34,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:34,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-26 20:57:34,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:34,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:34,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:34,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 20:57:34,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:34,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-26 20:57:34,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:34,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:57:34,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-26 20:57:34,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:57:34,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:34,402 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 95 proven. 29 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-26 20:57:34,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818901535] [2020-10-26 20:57:34,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:57:34,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:57:34,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978330906] [2020-10-26 20:57:34,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:57:34,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:57:34,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:57:34,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:57:34,405 INFO L87 Difference]: Start difference. First operand 32587 states and 46028 transitions. Second operand 7 states. [2020-10-26 20:57:34,700 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:57:38,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:57:38,429 INFO L93 Difference]: Finished difference Result 82914 states and 117403 transitions. [2020-10-26 20:57:38,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 20:57:38,429 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 266 [2020-10-26 20:57:38,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:57:38,768 INFO L225 Difference]: With dead ends: 82914 [2020-10-26 20:57:38,769 INFO L226 Difference]: Without dead ends: 52362 [2020-10-26 20:57:38,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:57:38,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52362 states. [2020-10-26 20:57:39,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52362 to 51814. [2020-10-26 20:57:39,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51814 states. [2020-10-26 20:57:40,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51814 states to 51814 states and 71336 transitions. [2020-10-26 20:57:40,372 INFO L78 Accepts]: Start accepts. Automaton has 51814 states and 71336 transitions. Word has length 266 [2020-10-26 20:57:40,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:57:40,373 INFO L481 AbstractCegarLoop]: Abstraction has 51814 states and 71336 transitions. [2020-10-26 20:57:40,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:57:40,373 INFO L276 IsEmpty]: Start isEmpty. Operand 51814 states and 71336 transitions. [2020-10-26 20:57:40,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2020-10-26 20:57:40,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:57:40,401 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:57:40,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 20:57:40,402 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:57:40,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:57:40,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1632260358, now seen corresponding path program 1 times [2020-10-26 20:57:40,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:57:40,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779739159] [2020-10-26 20:57:40,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:57:40,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:40,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:40,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:41,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:42,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:42,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 284 [2020-10-26 20:57:42,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:57:42,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2121 [2020-10-26 20:57:42,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:42,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:57:42,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:57:42,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-26 20:57:42,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:42,876 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:57:42,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:57:42,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:42,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:42,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:42,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:57:42,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:42,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 20:57:42,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:42,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:57:42,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:57:42,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:57:42,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:42,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:57:43,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:43,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:43,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:43,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:57:43,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:43,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-26 20:57:43,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:43,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:57:43,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:57:43,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:57:43,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:43,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:57:43,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:43,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:43,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:43,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 20:57:43,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:43,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 181 [2020-10-26 20:57:43,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:43,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:57:43,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:57:43,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 20:57:43,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:43,453 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 115 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:57:43,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779739159] [2020-10-26 20:57:43,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:57:43,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:57:43,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585313653] [2020-10-26 20:57:43,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:57:43,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:57:43,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:57:43,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:57:43,455 INFO L87 Difference]: Start difference. First operand 51814 states and 71336 transitions. Second operand 7 states. [2020-10-26 20:57:43,951 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:57:44,518 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:57:48,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:57:48,641 INFO L93 Difference]: Finished difference Result 111780 states and 169056 transitions. [2020-10-26 20:57:48,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:57:48,642 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 270 [2020-10-26 20:57:48,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:57:49,158 INFO L225 Difference]: With dead ends: 111780 [2020-10-26 20:57:49,159 INFO L226 Difference]: Without dead ends: 64912 [2020-10-26 20:57:49,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:57:49,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64912 states. [2020-10-26 20:57:50,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64912 to 63339. [2020-10-26 20:57:50,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63339 states. [2020-10-26 20:57:51,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63339 states to 63339 states and 86068 transitions. [2020-10-26 20:57:51,178 INFO L78 Accepts]: Start accepts. Automaton has 63339 states and 86068 transitions. Word has length 270 [2020-10-26 20:57:51,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:57:51,178 INFO L481 AbstractCegarLoop]: Abstraction has 63339 states and 86068 transitions. [2020-10-26 20:57:51,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:57:51,179 INFO L276 IsEmpty]: Start isEmpty. Operand 63339 states and 86068 transitions. [2020-10-26 20:57:51,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-10-26 20:57:51,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:57:51,222 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:57:51,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 20:57:51,222 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:57:51,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:57:51,223 INFO L82 PathProgramCache]: Analyzing trace with hash 2067441594, now seen corresponding path program 1 times [2020-10-26 20:57:51,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:57:51,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243174055] [2020-10-26 20:57:51,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:57:51,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:51,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:51,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:53,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:56,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:56,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 288 [2020-10-26 20:57:56,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:57:56,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-26 20:57:56,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:56,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:57:56,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:57:56,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-26 20:57:56,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:56,587 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:57:56,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:57:56,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:56,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:56,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:56,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:57:56,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:56,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 20:57:56,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:56,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:57:56,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:57:56,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:57:56,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:56,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:57:56,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:56,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:56,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:56,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:57:56,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:56,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 20:57:56,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:56,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:57:56,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:57:56,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:57:56,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:56,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:57:56,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:56,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:56,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:56,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:57:56,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:56,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-26 20:57:56,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:56,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:57:56,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:57:56,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:57:56,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:56,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 20:57:56,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:57:56,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:57:57,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:57:57,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 20:57:57,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:57:57,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-26 20:57:57,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:57:57,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:57:57,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-26 20:57:57,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:57:57,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:57:57,289 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 101 proven. 35 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-26 20:57:57,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1243174055] [2020-10-26 20:57:57,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:57:57,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:57:57,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044820003] [2020-10-26 20:57:57,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:57:57,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:57:57,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:57:57,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:57:57,292 INFO L87 Difference]: Start difference. First operand 63339 states and 86068 transitions. Second operand 7 states. [2020-10-26 20:57:57,635 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:57:58,556 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-26 20:58:02,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:58:02,709 INFO L93 Difference]: Finished difference Result 143507 states and 197555 transitions. [2020-10-26 20:58:02,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:58:02,710 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 272 [2020-10-26 20:58:02,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:58:03,008 INFO L225 Difference]: With dead ends: 143507 [2020-10-26 20:58:03,009 INFO L226 Difference]: Without dead ends: 80289 [2020-10-26 20:58:03,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:58:03,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80289 states. [2020-10-26 20:58:05,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80289 to 79742. [2020-10-26 20:58:05,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79742 states. [2020-10-26 20:58:05,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79742 states to 79742 states and 108451 transitions. [2020-10-26 20:58:05,875 INFO L78 Accepts]: Start accepts. Automaton has 79742 states and 108451 transitions. Word has length 272 [2020-10-26 20:58:05,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:58:05,875 INFO L481 AbstractCegarLoop]: Abstraction has 79742 states and 108451 transitions. [2020-10-26 20:58:05,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:58:05,875 INFO L276 IsEmpty]: Start isEmpty. Operand 79742 states and 108451 transitions. [2020-10-26 20:58:05,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2020-10-26 20:58:05,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:58:05,918 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:58:05,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 20:58:05,919 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:58:05,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:58:05,919 INFO L82 PathProgramCache]: Analyzing trace with hash 16830082, now seen corresponding path program 1 times [2020-10-26 20:58:05,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:58:05,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803394321] [2020-10-26 20:58:05,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:58:06,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:58:06,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:06,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:07,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:08,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:58:08,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 298 [2020-10-26 20:58:08,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:58:08,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2443 [2020-10-26 20:58:08,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:58:08,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:58:08,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-26 20:58:08,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-26 20:58:08,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:58:08,749 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:58:08,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:58:08,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:58:08,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:08,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:58:08,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:58:08,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:58:08,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 20:58:08,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:58:08,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:58:08,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:58:08,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:58:08,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:58:08,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:58:08,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:58:08,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:08,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:58:08,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 20:58:08,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:58:08,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-26 20:58:08,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:58:08,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:58:08,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:58:08,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 20:58:08,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:58:08,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-26 20:58:08,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:58:08,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:09,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:58:09,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 20:58:09,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:58:09,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 213 [2020-10-26 20:58:09,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:58:09,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:58:09,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:58:09,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 20:58:09,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:58:09,575 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 143 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:58:09,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803394321] [2020-10-26 20:58:09,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:58:09,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:58:09,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029956557] [2020-10-26 20:58:09,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:58:09,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:58:09,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:58:09,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:58:09,577 INFO L87 Difference]: Start difference. First operand 79742 states and 108451 transitions. Second operand 7 states. [2020-10-26 20:58:10,110 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:58:11,584 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-26 20:58:14,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:58:14,499 INFO L93 Difference]: Finished difference Result 178076 states and 247570 transitions. [2020-10-26 20:58:14,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:58:14,500 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 284 [2020-10-26 20:58:14,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:58:15,423 INFO L225 Difference]: With dead ends: 178076 [2020-10-26 20:58:15,423 INFO L226 Difference]: Without dead ends: 104377 [2020-10-26 20:58:15,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:58:15,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104377 states. [2020-10-26 20:58:18,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104377 to 102030. [2020-10-26 20:58:18,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102030 states. [2020-10-26 20:58:18,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102030 states to 102030 states and 137960 transitions. [2020-10-26 20:58:18,547 INFO L78 Accepts]: Start accepts. Automaton has 102030 states and 137960 transitions. Word has length 284 [2020-10-26 20:58:18,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:58:18,547 INFO L481 AbstractCegarLoop]: Abstraction has 102030 states and 137960 transitions. [2020-10-26 20:58:18,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:58:18,547 INFO L276 IsEmpty]: Start isEmpty. Operand 102030 states and 137960 transitions. [2020-10-26 20:58:18,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-26 20:58:18,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:58:18,834 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:58:18,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 20:58:18,835 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:58:18,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:58:18,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1352218355, now seen corresponding path program 1 times [2020-10-26 20:58:18,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:58:18,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137718623] [2020-10-26 20:58:18,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:58:18,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:58:18,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:19,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:20,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:21,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:23,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:23,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:58:23,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-10-26 20:58:23,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:58:23,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 20:58:23,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:58:23,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 20:58:23,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:58:23,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 320 [2020-10-26 20:58:23,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:58:24,517 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:58:24,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:58:24,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:58:24,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:24,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:58:24,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:58:24,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:58:24,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 20:58:24,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:58:24,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:58:24,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:58:24,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:58:24,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:58:24,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:58:24,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:58:24,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:24,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:58:24,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:58:24,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:58:24,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-26 20:58:24,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:58:24,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:58:24,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:58:24,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:58:24,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:58:24,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:58:24,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:58:24,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:24,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:58:24,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 20:58:24,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:58:24,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-26 20:58:24,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:58:24,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:58:24,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:58:24,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-26 20:58:24,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:58:24,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-10-26 20:58:25,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:58:25,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:58:25,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:58:25,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 20:58:25,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:58:25,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-26 20:58:25,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:58:25,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:58:25,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:58:25,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-26 20:58:25,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:58:25,752 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 57 proven. 163 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-26 20:58:25,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137718623] [2020-10-26 20:58:25,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:58:25,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:58:25,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514959923] [2020-10-26 20:58:25,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 20:58:25,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:58:25,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 20:58:25,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-26 20:58:25,754 INFO L87 Difference]: Start difference. First operand 102030 states and 137960 transitions. Second operand 9 states. [2020-10-26 20:58:26,060 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:58:27,637 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-10-26 20:58:28,367 WARN L193 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 171 [2020-10-26 20:58:31,271 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 171