/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_8.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:29:47,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:29:47,354 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:29:47,407 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:29:47,408 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:29:47,415 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:29:47,417 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:29:47,423 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:29:47,426 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:29:47,432 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:29:47,433 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:29:47,435 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:29:47,435 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:29:47,438 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:29:47,442 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:29:47,447 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:29:47,448 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:29:47,452 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:29:47,455 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:29:47,463 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:29:47,465 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:29:47,466 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:29:47,467 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:29:47,470 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:29:47,478 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:29:47,478 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:29:47,478 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:29:47,480 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:29:47,481 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:29:47,482 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:29:47,482 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:29:47,483 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:29:47,485 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:29:47,486 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:29:47,487 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:29:47,487 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:29:47,488 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:29:47,488 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:29:47,488 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:29:47,489 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:29:47,490 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:29:47,497 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 20:29:47,546 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:29:47,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:29:47,550 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:29:47,550 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:29:47,550 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:29:47,551 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:29:47,551 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:29:47,551 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:29:47,551 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:29:47,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:29:47,552 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:29:47,553 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:29:47,553 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:29:47,553 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:29:47,553 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:29:47,553 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:29:47,554 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:29:47,554 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:29:47,554 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:29:47,554 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:29:47,555 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:29:47,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:29:47,555 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:29:47,555 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:29:47,555 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:29:47,556 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:29:47,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:29:47,556 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:29:47,556 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:29:47,556 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:29:47,950 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:29:47,976 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:29:47,979 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:29:47,980 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:29:47,981 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:29:47,982 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_8.c [2020-10-27 20:29:48,065 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fac2b9e43/ecde278db9e04c48877191f67a375c2d/FLAGfbe9476c2 [2020-10-27 20:29:48,708 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:29:48,709 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/mono-crafted_8.c [2020-10-27 20:29:48,716 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fac2b9e43/ecde278db9e04c48877191f67a375c2d/FLAGfbe9476c2 [2020-10-27 20:29:49,072 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fac2b9e43/ecde278db9e04c48877191f67a375c2d [2020-10-27 20:29:49,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:29:49,084 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:29:49,086 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:29:49,086 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:29:49,090 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:29:49,091 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:29:49" (1/1) ... [2020-10-27 20:29:49,094 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d846b01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:29:49, skipping insertion in model container [2020-10-27 20:29:49,094 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:29:49" (1/1) ... [2020-10-27 20:29:49,102 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:29:49,116 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:29:49,290 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:29:49,300 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:29:49,316 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:29:49,332 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:29:49,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:29:49 WrapperNode [2020-10-27 20:29:49,332 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:29:49,334 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:29:49,334 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:29:49,334 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:29:49,347 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:29:49" (1/1) ... [2020-10-27 20:29:49,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:29:49" (1/1) ... [2020-10-27 20:29:49,355 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:29:49" (1/1) ... [2020-10-27 20:29:49,355 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:29:49" (1/1) ... [2020-10-27 20:29:49,361 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:29:49" (1/1) ... [2020-10-27 20:29:49,365 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:29:49" (1/1) ... [2020-10-27 20:29:49,366 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:29:49" (1/1) ... [2020-10-27 20:29:49,369 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:29:49,370 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:29:49,370 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:29:49,370 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:29:49,371 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:29:49" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:29:49,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:29:49,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:29:49,447 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:29:49,448 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 20:29:49,448 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:29:49,448 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:29:49,448 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:29:49,449 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:29:49,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:29:49,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:29:49,451 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:29:49,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:29:49,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:29:49,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:29:49,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:29:49,453 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:29:49,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:29:49,703 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:29:49,703 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 20:29:49,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:29:49 BoogieIcfgContainer [2020-10-27 20:29:49,706 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:29:49,708 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:29:49,709 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:29:49,713 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:29:49,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:29:49" (1/3) ... [2020-10-27 20:29:49,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@152286a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:29:49, skipping insertion in model container [2020-10-27 20:29:49,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:29:49" (2/3) ... [2020-10-27 20:29:49,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@152286a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:29:49, skipping insertion in model container [2020-10-27 20:29:49,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:29:49" (3/3) ... [2020-10-27 20:29:49,717 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_8.c [2020-10-27 20:29:49,751 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:29:49,762 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:29:49,795 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:29:49,853 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:29:49,853 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:29:49,854 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:29:49,854 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:29:49,854 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:29:49,854 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:29:49,854 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:29:49,854 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:29:49,900 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-27 20:29:49,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 20:29:49,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:49,908 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:49,908 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:49,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:49,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1507135652, now seen corresponding path program 1 times [2020-10-27 20:29:49,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:49,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480745145] [2020-10-27 20:29:49,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:50,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:50,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:50,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:50,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 20:29:50,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:50,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-27 20:29:50,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:50,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:50,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:29:50,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:50,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 20:29:50,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:50,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:50,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:50,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:50,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:50,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:50,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 20:29:50,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:50,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:50,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:50,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:50,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:50,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:50,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480745145] [2020-10-27 20:29:50,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:29:50,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 20:29:50,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005382361] [2020-10-27 20:29:50,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 20:29:50,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:50,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 20:29:50,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:29:50,399 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-10-27 20:29:50,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:50,469 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-10-27 20:29:50,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 20:29:50,471 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-27 20:29:50,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:50,479 INFO L225 Difference]: With dead ends: 38 [2020-10-27 20:29:50,479 INFO L226 Difference]: Without dead ends: 15 [2020-10-27 20:29:50,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:29:50,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-27 20:29:50,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-27 20:29:50,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-27 20:29:50,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-27 20:29:50,530 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-10-27 20:29:50,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:50,531 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-27 20:29:50,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 20:29:50,531 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-27 20:29:50,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 20:29:50,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:50,533 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:50,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:29:50,533 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:50,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:50,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1192214991, now seen corresponding path program 1 times [2020-10-27 20:29:50,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:50,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910793922] [2020-10-27 20:29:50,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:50,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:50,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:50,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:50,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 20:29:50,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:50,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-27 20:29:50,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:50,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:29:50,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:29:50,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 20:29:50,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:50,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:50,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:50,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:50,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:50,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:50,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:50,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 20:29:50,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:50,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:50,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:50,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:50,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:50,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:50,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910793922] [2020-10-27 20:29:50,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:29:50,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:29:50,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032448519] [2020-10-27 20:29:50,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:29:50,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:50,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:29:50,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:29:50,876 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-10-27 20:29:50,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:50,993 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-27 20:29:50,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:29:50,994 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-27 20:29:50,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:50,995 INFO L225 Difference]: With dead ends: 24 [2020-10-27 20:29:50,995 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 20:29:50,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:29:50,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 20:29:51,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2020-10-27 20:29:51,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-27 20:29:51,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-27 20:29:51,005 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2020-10-27 20:29:51,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:51,005 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-27 20:29:51,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:29:51,005 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-27 20:29:51,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 20:29:51,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:51,006 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:51,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:29:51,007 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:51,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:51,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1953512822, now seen corresponding path program 1 times [2020-10-27 20:29:51,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:51,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619680666] [2020-10-27 20:29:51,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:51,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:51,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:51,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:51,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:51,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 20:29:51,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:29:51,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 224 [2020-10-27 20:29:51,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:51,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:29:51,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:29:51,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 20:29:51,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:29:51,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:51,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:51,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:51,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:51,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:51,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:51,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:29:51,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:51,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:51,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:51,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:51,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:51,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:51,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619680666] [2020-10-27 20:29:51,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:29:51,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:29:51,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571436566] [2020-10-27 20:29:51,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:29:51,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:51,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:29:51,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:29:51,335 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 4 states. [2020-10-27 20:29:51,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:51,410 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-27 20:29:51,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:29:51,411 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-27 20:29:51,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:51,411 INFO L225 Difference]: With dead ends: 27 [2020-10-27 20:29:51,411 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 20:29:51,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:29:51,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 20:29:51,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-27 20:29:51,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-27 20:29:51,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-27 20:29:51,420 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2020-10-27 20:29:51,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:51,420 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-27 20:29:51,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:29:51,420 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-27 20:29:51,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 20:29:51,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:51,421 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:51,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:29:51,422 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:51,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:51,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1532107848, now seen corresponding path program 1 times [2020-10-27 20:29:51,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:51,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125831167] [2020-10-27 20:29:51,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:51,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:51,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:51,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:51,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 20:29:51,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:51,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-27 20:29:51,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:51,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:29:51,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:29:51,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 20:29:51,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:51,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:51,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:51,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:51,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:51,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:51,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:51,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:29:51,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:51,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:51,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:51,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:51,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:51,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:51,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125831167] [2020-10-27 20:29:51,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:51,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 20:29:51,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488427918] [2020-10-27 20:29:51,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:29:51,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:51,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:29:51,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:29:51,668 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-10-27 20:29:51,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:51,808 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-10-27 20:29:51,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:29:51,808 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-27 20:29:51,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:51,809 INFO L225 Difference]: With dead ends: 27 [2020-10-27 20:29:51,809 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 20:29:51,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:29:51,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 20:29:51,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-10-27 20:29:51,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 20:29:51,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-27 20:29:51,816 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2020-10-27 20:29:51,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:51,817 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-27 20:29:51,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:29:51,817 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-27 20:29:51,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 20:29:51,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:51,818 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:51,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:29:51,818 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:51,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:51,819 INFO L82 PathProgramCache]: Analyzing trace with hash 556673393, now seen corresponding path program 1 times [2020-10-27 20:29:51,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:51,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744595026] [2020-10-27 20:29:51,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:51,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:51,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:51,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:52,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:52,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 20:29:52,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:29:52,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-10-27 20:29:52,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:52,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:29:52,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:29:52,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:29:52,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:52,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:52,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:52,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:52,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:52,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:52,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:52,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 20:29:52,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:52,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:52,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:52,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:52,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:52,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:52,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744595026] [2020-10-27 20:29:52,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:52,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 20:29:52,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247399717] [2020-10-27 20:29:52,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:29:52,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:52,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:29:52,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:29:52,125 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 5 states. [2020-10-27 20:29:52,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:52,239 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-10-27 20:29:52,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:29:52,240 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-27 20:29:52,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:52,241 INFO L225 Difference]: With dead ends: 30 [2020-10-27 20:29:52,241 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 20:29:52,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:29:52,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 20:29:52,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-10-27 20:29:52,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-27 20:29:52,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-27 20:29:52,248 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2020-10-27 20:29:52,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:52,248 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-27 20:29:52,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:29:52,248 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-27 20:29:52,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 20:29:52,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:52,249 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:52,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:29:52,249 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:52,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:52,250 INFO L82 PathProgramCache]: Analyzing trace with hash -252673233, now seen corresponding path program 2 times [2020-10-27 20:29:52,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:52,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891547792] [2020-10-27 20:29:52,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:52,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:52,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:52,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:52,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:52,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 20:29:52,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:29:52,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-27 20:29:52,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:52,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:29:52,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:29:52,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:29:52,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:52,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:52,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:52,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:52,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:52,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:52,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:52,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:29:52,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:52,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:52,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:52,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:52,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:52,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:52,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891547792] [2020-10-27 20:29:52,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:52,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 20:29:52,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443153770] [2020-10-27 20:29:52,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:29:52,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:52,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:29:52,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:29:52,556 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2020-10-27 20:29:52,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:52,772 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-10-27 20:29:52,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:29:52,773 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-27 20:29:52,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:52,773 INFO L225 Difference]: With dead ends: 30 [2020-10-27 20:29:52,774 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 20:29:52,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:29:52,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 20:29:52,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-10-27 20:29:52,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 20:29:52,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-27 20:29:52,781 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2020-10-27 20:29:52,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:52,782 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-27 20:29:52,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:29:52,782 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-27 20:29:52,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 20:29:52,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:52,783 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:52,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:29:52,783 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:52,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:52,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1838613802, now seen corresponding path program 2 times [2020-10-27 20:29:52,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:52,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988877826] [2020-10-27 20:29:52,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:52,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:52,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:52,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:52,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:53,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:53,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 20:29:53,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:53,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 385 [2020-10-27 20:29:53,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:53,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:29:53,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:29:53,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:29:53,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:53,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:53,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:53,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:53,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:53,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:53,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:53,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:29:53,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:53,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:53,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:53,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:53,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:53,271 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:53,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988877826] [2020-10-27 20:29:53,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:53,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 20:29:53,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505959222] [2020-10-27 20:29:53,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:29:53,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:53,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:29:53,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:29:53,273 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 6 states. [2020-10-27 20:29:53,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:53,429 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-10-27 20:29:53,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:29:53,429 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-27 20:29:53,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:53,430 INFO L225 Difference]: With dead ends: 33 [2020-10-27 20:29:53,430 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 20:29:53,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:29:53,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 20:29:53,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-27 20:29:53,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 20:29:53,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-27 20:29:53,437 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2020-10-27 20:29:53,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:53,437 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-27 20:29:53,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:29:53,438 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-27 20:29:53,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 20:29:53,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:53,438 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:53,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:29:53,439 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:53,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:53,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1029267176, now seen corresponding path program 3 times [2020-10-27 20:29:53,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:53,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919470546] [2020-10-27 20:29:53,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:53,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:53,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:53,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:53,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:53,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:53,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 20:29:53,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:29:53,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-10-27 20:29:53,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:53,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:29:53,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:29:53,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 20:29:53,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:53,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:53,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:53,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:53,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:53,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:53,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:53,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:29:53,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:53,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:53,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:53,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:53,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:53,822 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:53,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919470546] [2020-10-27 20:29:53,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:53,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:29:53,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322056912] [2020-10-27 20:29:53,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:29:53,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:53,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:29:53,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:29:53,825 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 7 states. [2020-10-27 20:29:54,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:54,060 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-10-27 20:29:54,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:29:54,061 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-27 20:29:54,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:54,062 INFO L225 Difference]: With dead ends: 33 [2020-10-27 20:29:54,062 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 20:29:54,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:29:54,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 20:29:54,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-10-27 20:29:54,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 20:29:54,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-10-27 20:29:54,068 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21 [2020-10-27 20:29:54,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:54,069 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-10-27 20:29:54,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:29:54,069 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-10-27 20:29:54,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 20:29:54,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:54,070 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:54,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:29:54,070 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:54,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:54,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1276142289, now seen corresponding path program 3 times [2020-10-27 20:29:54,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:54,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996546903] [2020-10-27 20:29:54,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:54,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:54,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:54,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:54,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:54,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:54,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:54,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:29:54,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:29:54,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 670 [2020-10-27 20:29:54,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:54,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:29:54,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:29:54,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:29:54,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:54,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:54,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:54,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:54,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:54,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:54,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:54,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:29:54,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:54,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:54,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:54,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:54,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:54,980 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:54,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996546903] [2020-10-27 20:29:54,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:54,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:29:54,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808651332] [2020-10-27 20:29:54,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:29:54,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:54,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:29:54,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:29:54,991 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 8 states. [2020-10-27 20:29:55,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:55,342 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-10-27 20:29:55,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:29:55,342 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-27 20:29:55,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:55,343 INFO L225 Difference]: With dead ends: 36 [2020-10-27 20:29:55,343 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 20:29:55,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:29:55,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 20:29:55,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-10-27 20:29:55,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 20:29:55,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-27 20:29:55,350 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 24 [2020-10-27 20:29:55,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:55,351 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-27 20:29:55,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:29:55,351 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-27 20:29:55,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 20:29:55,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:55,352 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:55,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:29:55,352 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:55,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:55,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1346344376, now seen corresponding path program 4 times [2020-10-27 20:29:55,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:55,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593331971] [2020-10-27 20:29:55,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:55,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:55,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:55,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:55,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:55,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:55,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:56,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:56,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 20:29:56,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:29:56,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1264 [2020-10-27 20:29:56,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:56,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:29:56,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:29:56,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 20:29:56,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:56,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:56,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:56,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:56,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:56,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:56,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:56,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:29:56,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:56,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:56,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:56,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:56,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:56,771 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:56,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593331971] [2020-10-27 20:29:56,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:56,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:29:56,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070797632] [2020-10-27 20:29:56,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:29:56,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:56,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:29:56,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:29:56,775 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2020-10-27 20:29:57,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:57,072 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-10-27 20:29:57,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:29:57,072 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-27 20:29:57,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:57,073 INFO L225 Difference]: With dead ends: 41 [2020-10-27 20:29:57,073 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 20:29:57,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:29:57,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 20:29:57,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-27 20:29:57,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 20:29:57,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-27 20:29:57,080 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 27 [2020-10-27 20:29:57,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:57,080 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-27 20:29:57,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:29:57,080 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-27 20:29:57,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 20:29:57,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:57,081 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:57,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:29:57,082 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:57,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:57,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1454626424, now seen corresponding path program 4 times [2020-10-27 20:29:57,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:57,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976546159] [2020-10-27 20:29:57,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:57,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:57,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:57,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:57,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:57,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:57,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:58,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:58,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 20:29:58,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:29:58,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1007 [2020-10-27 20:29:58,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:58,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:29:58,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:29:58,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 20:29:58,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:58,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:58,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:58,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:58,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:58,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:58,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:58,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:29:58,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:58,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:58,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:58,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:58,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:58,207 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-27 20:29:58,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976546159] [2020-10-27 20:29:58,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:58,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 20:29:58,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646580561] [2020-10-27 20:29:58,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:29:58,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:58,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:29:58,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:29:58,209 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 6 states. [2020-10-27 20:30:00,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:00,521 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-10-27 20:30:00,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:30:00,522 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-27 20:30:00,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:00,523 INFO L225 Difference]: With dead ends: 39 [2020-10-27 20:30:00,523 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 20:30:00,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:30:00,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 20:30:00,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-10-27 20:30:00,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 20:30:00,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-10-27 20:30:00,530 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 27 [2020-10-27 20:30:00,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:00,530 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-10-27 20:30:00,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:30:00,530 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-10-27 20:30:00,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 20:30:00,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:00,531 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:00,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:30:00,531 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:00,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:00,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1593447473, now seen corresponding path program 5 times [2020-10-27 20:30:00,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:00,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639301357] [2020-10-27 20:30:00,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:00,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:00,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:00,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:00,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:00,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:00,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:00,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:03,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:03,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 20:30:03,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:30:03,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2457 [2020-10-27 20:30:03,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:03,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:30:03,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:30:03,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 20:30:03,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:03,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:03,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:03,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:03,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:03,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:03,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:03,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:30:03,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:03,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:03,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:03,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:03,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:03,479 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:30:03,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639301357] [2020-10-27 20:30:03,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:03,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:30:03,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714269413] [2020-10-27 20:30:03,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:30:03,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:03,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:30:03,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:30:03,481 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 10 states. [2020-10-27 20:30:04,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:04,019 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2020-10-27 20:30:04,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:30:04,020 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-27 20:30:04,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:04,021 INFO L225 Difference]: With dead ends: 47 [2020-10-27 20:30:04,021 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 20:30:04,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:30:04,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 20:30:04,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2020-10-27 20:30:04,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 20:30:04,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-27 20:30:04,033 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 30 [2020-10-27 20:30:04,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:04,034 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-27 20:30:04,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:30:04,034 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-27 20:30:04,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 20:30:04,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:04,037 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:04,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:30:04,037 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:04,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:04,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1730626328, now seen corresponding path program 6 times [2020-10-27 20:30:04,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:04,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905203984] [2020-10-27 20:30:04,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:04,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:04,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:04,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:04,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:04,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:04,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:04,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:04,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:07,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:07,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 20:30:07,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 20:30:07,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3507 [2020-10-27 20:30:07,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:07,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:30:07,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:30:07,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 20:30:07,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:30:07,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:07,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:07,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:07,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:07,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:07,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:07,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:30:07,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:07,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:07,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:07,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:07,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:08,005 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 20:30:08,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905203984] [2020-10-27 20:30:08,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:08,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:30:08,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344836018] [2020-10-27 20:30:08,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:30:08,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:08,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:30:08,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:30:08,011 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 9 states. [2020-10-27 20:30:12,438 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification that was a NOOP. DAG size: 53 [2020-10-27 20:30:12,722 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-10-27 20:30:15,034 WARN L193 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-10-27 20:30:17,379 WARN L193 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-10-27 20:30:21,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:21,800 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2020-10-27 20:30:21,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 20:30:21,800 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-10-27 20:30:21,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:21,801 INFO L225 Difference]: With dead ends: 54 [2020-10-27 20:30:21,801 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 20:30:21,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=110, Invalid=231, Unknown=1, NotChecked=0, Total=342 [2020-10-27 20:30:21,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 20:30:21,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2020-10-27 20:30:21,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 20:30:21,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-10-27 20:30:21,810 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 33 [2020-10-27 20:30:21,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:21,811 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-10-27 20:30:21,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:30:21,811 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-10-27 20:30:21,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 20:30:21,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:21,812 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:21,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 20:30:21,813 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:21,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:21,814 INFO L82 PathProgramCache]: Analyzing trace with hash -152288047, now seen corresponding path program 7 times [2020-10-27 20:30:21,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:21,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805263916] [2020-10-27 20:30:21,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:21,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:21,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:21,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:21,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:21,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:22,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:22,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:22,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:22,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:26,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:26,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 20:30:26,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 20:30:26,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 20:30:26,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:26,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:30:26,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:30:26,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 20:30:26,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:27,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:27,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:27,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:27,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:27,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:27,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:27,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:30:27,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:27,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:27,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:27,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:27,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:27,060 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:30:27,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805263916] [2020-10-27 20:30:27,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:27,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:30:27,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368980419] [2020-10-27 20:30:27,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:30:27,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:27,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:30:27,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:30:27,064 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 11 states. [2020-10-27 20:30:27,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:27,675 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-10-27 20:30:27,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:30:27,676 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-10-27 20:30:27,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:27,677 INFO L225 Difference]: With dead ends: 61 [2020-10-27 20:30:27,677 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 20:30:27,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:30:27,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 20:30:27,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-27 20:30:27,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 20:30:27,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-10-27 20:30:27,689 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 36 [2020-10-27 20:30:27,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:27,689 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-10-27 20:30:27,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:30:27,690 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-10-27 20:30:27,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 20:30:27,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:27,691 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:27,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 20:30:27,691 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:27,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:27,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1780901610, now seen corresponding path program 8 times [2020-10-27 20:30:27,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:27,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365565233] [2020-10-27 20:30:27,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:27,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:27,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:27,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:27,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:27,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:27,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:28,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:28,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:28,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:29,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:29,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:29,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:32,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:32,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 20:30:32,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 20:30:32,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 20:30:32,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:32,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:30:32,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:30:32,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 20:30:32,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:02,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:31:02,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:02,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:02,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:02,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:31:02,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:02,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:31:02,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:02,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:02,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:02,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:02,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:02,464 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 151 refuted. 18 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 20:31:02,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365565233] [2020-10-27 20:31:02,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:31:02,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 20:31:02,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156657040] [2020-10-27 20:31:02,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 20:31:02,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:31:02,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 20:31:02,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=134, Unknown=14, NotChecked=0, Total=182 [2020-10-27 20:31:02,466 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 14 states. [2020-10-27 20:31:05,261 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2020-10-27 20:31:05,430 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-10-27 20:31:05,833 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-10-27 20:31:06,447 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2020-10-27 20:31:07,547 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 56 [2020-10-27 20:31:07,979 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 60 [2020-10-27 20:31:09,092 WARN L193 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 56 [2020-10-27 20:31:09,559 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 60 [2020-10-27 20:31:10,322 WARN L193 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 56 [2020-10-27 20:31:10,985 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 60 [2020-10-27 20:31:11,867 WARN L193 SmtUtils]: Spent 741.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 56 [2020-10-27 20:31:14,139 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 120 DAG size of output: 60 [2020-10-27 20:31:15,301 WARN L193 SmtUtils]: Spent 765.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 56 [2020-10-27 20:31:20,896 WARN L193 SmtUtils]: Spent 3.55 s on a formula simplification. DAG size of input: 110 DAG size of output: 60 [2020-10-27 20:31:24,967 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~y~0 (- 1)))) (and (= |c_#t~string5.offset| |c_old(#t~string5.offset)|) (= |c_old(#length)| |c_#length|) (<= (+ (* 4294967296 (div (+ c_main_~y~0 (* (div (+ c_main_~x~0 .cse0 4299967293) 4294967296) 4294967296) 4284967295) 4294967296)) 3) c_main_~x~0) (= |c_#t~string6.base| |c_old(#t~string6.base)|) (= |c_#t~string6.offset| |c_old(#t~string6.offset)|) (<= 10000000 c_main_~y~0) (<= (+ (* 4294967296 (div (+ (* (div (+ c_main_~x~0 .cse0 4299967294) 4294967296) 4294967296) c_main_~y~0 4284967295) 4294967296)) 2) c_main_~x~0) (<= (+ (* 4294967296 (div (+ c_main_~y~0 (* (div (+ c_main_~x~0 .cse0 4299967288) 4294967296) 4294967296) 4284967295) 4294967296)) 8) c_main_~x~0) (= |c_#t~string4.offset| |c_old(#t~string4.offset)|) (= |c_old(#valid)| |c_#valid|) (= |c_#t~string5.base| |c_old(#t~string5.base)|) (<= (+ (* 4294967296 (div (+ (* (div (+ c_main_~x~0 .cse0 4299967292) 4294967296) 4294967296) c_main_~y~0 4284967295) 4294967296)) 4) c_main_~x~0) (= |c_#t~string4.base| |c_old(#t~string4.base)|) (<= (+ (* 4294967296 (div (+ c_main_~y~0 (* (div (+ c_main_~x~0 .cse0 4299967291) 4294967296) 4294967296) 4284967295) 4294967296)) 5) c_main_~x~0) (<= c_main_~y~0 10000000) (= |c_#NULL.base| |c_old(#NULL.base)|) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (<= (+ (* 4294967296 (div (+ c_main_~y~0 (* (div (+ c_main_~x~0 .cse0 4299967289) 4294967296) 4294967296) 4284967295) 4294967296)) 7) c_main_~x~0) (<= (+ c_main_~x~0 5000001) (+ c_main_~y~0 (* 4294967296 (div c_main_~x~0 4294967296)))) (<= (+ (* 4294967296 (div (+ c_main_~y~0 (* (div (+ c_main_~x~0 .cse0 4299967290) 4294967296) 4294967296) 4284967295) 4294967296)) 6) c_main_~x~0))) is different from false [2020-10-27 20:31:27,778 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 60 [2020-10-27 20:31:29,596 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 80 DAG size of output: 30 [2020-10-27 20:31:31,357 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 60 [2020-10-27 20:31:32,093 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2020-10-27 20:31:32,591 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-10-27 20:31:35,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:31:35,640 INFO L93 Difference]: Finished difference Result 105 states and 131 transitions. [2020-10-27 20:31:35,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 20:31:35,641 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2020-10-27 20:31:35,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:31:35,646 INFO L225 Difference]: With dead ends: 105 [2020-10-27 20:31:35,646 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 20:31:35,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 54.6s TimeCoverageRelationStatistics Valid=472, Invalid=1157, Unknown=15, NotChecked=78, Total=1722 [2020-10-27 20:31:35,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 20:31:35,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 64. [2020-10-27 20:31:35,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 20:31:35,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2020-10-27 20:31:35,684 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 45 [2020-10-27 20:31:35,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:31:35,685 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2020-10-27 20:31:35,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 20:31:35,685 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2020-10-27 20:31:35,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 20:31:35,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:31:35,690 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:31:35,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 20:31:35,690 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:31:35,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:31:35,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1207290742, now seen corresponding path program 9 times [2020-10-27 20:31:35,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:31:35,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840260670] [2020-10-27 20:31:35,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:31:35,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:35,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:35,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:35,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:36,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:36,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:36,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:36,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:36,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:40,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:40,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 20:31:40,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 20:31:40,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 20:31:40,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:40,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:31:40,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:31:40,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 20:31:40,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:41,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:31:41,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:41,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:41,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:41,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:31:41,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:41,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:31:41,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:41,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:41,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:41,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:41,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:41,095 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 225 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-27 20:31:41,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840260670] [2020-10-27 20:31:41,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:31:41,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:31:41,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065290608] [2020-10-27 20:31:41,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:31:41,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:31:41,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:31:41,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:31:41,103 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 12 states. [2020-10-27 20:31:41,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:31:41,853 INFO L93 Difference]: Finished difference Result 103 states and 122 transitions. [2020-10-27 20:31:41,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 20:31:41,855 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2020-10-27 20:31:41,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:31:41,855 INFO L225 Difference]: With dead ends: 103 [2020-10-27 20:31:41,856 INFO L226 Difference]: Without dead ends: 68 [2020-10-27 20:31:41,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:31:41,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-27 20:31:41,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-27 20:31:41,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 20:31:41,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2020-10-27 20:31:41,885 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 63 [2020-10-27 20:31:41,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:31:41,885 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2020-10-27 20:31:41,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:31:41,886 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2020-10-27 20:31:41,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 20:31:41,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:31:41,887 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:31:41,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 20:31:41,887 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:31:41,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:31:41,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1037135503, now seen corresponding path program 10 times [2020-10-27 20:31:41,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:31:41,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [254796509] [2020-10-27 20:31:41,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:31:41,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:41,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:41,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:41,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:42,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:42,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:42,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:42,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:42,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:42,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:45,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:46,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:46,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:46,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:46,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:46,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:46,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 20:31:46,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 20:31:46,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 20:31:46,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:46,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:31:46,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:31:46,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 20:31:46,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:01,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:01,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:01,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:01,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:01,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:01,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:01,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:32:01,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:01,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:01,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:01,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:01,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:01,760 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 414 refuted. 6 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-27 20:32:01,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [254796509] [2020-10-27 20:32:01,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:01,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 20:32:01,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52223043] [2020-10-27 20:32:01,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 20:32:01,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:01,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 20:32:01,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=224, Unknown=6, NotChecked=0, Total=272 [2020-10-27 20:32:01,763 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand 17 states. [2020-10-27 20:32:02,778 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2020-10-27 20:32:05,030 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2020-10-27 20:32:05,559 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2020-10-27 20:32:05,808 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 62 [2020-10-27 20:32:06,734 WARN L193 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2020-10-27 20:32:07,175 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 62 [2020-10-27 20:32:09,691 WARN L193 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 58 [2020-10-27 20:32:10,150 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 62 [2020-10-27 20:32:12,271 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 112 DAG size of output: 58 [2020-10-27 20:32:13,405 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 62 [2020-10-27 20:32:15,369 WARN L193 SmtUtils]: Spent 721.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 58 [2020-10-27 20:32:16,720 WARN L193 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 62 [2020-10-27 20:32:20,297 WARN L193 SmtUtils]: Spent 2.73 s on a formula simplification. DAG size of input: 134 DAG size of output: 58 [2020-10-27 20:32:21,556 WARN L193 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 62 [2020-10-27 20:32:24,270 WARN L193 SmtUtils]: Spent 2.42 s on a formula simplification. DAG size of input: 161 DAG size of output: 62 [2020-10-27 20:32:27,585 WARN L193 SmtUtils]: Spent 3.06 s on a formula simplification. DAG size of input: 145 DAG size of output: 58 [2020-10-27 20:32:30,735 WARN L193 SmtUtils]: Spent 896.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 63 [2020-10-27 20:32:36,663 WARN L193 SmtUtils]: Spent 3.65 s on a formula simplification. DAG size of input: 150 DAG size of output: 62 [2020-10-27 20:32:41,557 WARN L193 SmtUtils]: Spent 4.72 s on a formula simplification. DAG size of input: 167 DAG size of output: 58 [2020-10-27 20:32:47,041 WARN L193 SmtUtils]: Spent 3.31 s on a formula simplification. DAG size of input: 156 DAG size of output: 58 [2020-10-27 20:32:53,269 WARN L193 SmtUtils]: Spent 906.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 63 [2020-10-27 20:32:59,116 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 63 [2020-10-27 20:33:05,018 WARN L193 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 63 [2020-10-27 20:33:11,027 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 63 [2020-10-27 20:33:17,082 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 63 [2020-10-27 20:33:20,096 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2020-10-27 20:33:20,909 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2020-10-27 20:33:23,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:33:23,853 INFO L93 Difference]: Finished difference Result 115 states and 140 transitions. [2020-10-27 20:33:23,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 20:33:23,854 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2020-10-27 20:33:23,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:33:23,855 INFO L225 Difference]: With dead ends: 115 [2020-10-27 20:33:23,855 INFO L226 Difference]: Without dead ends: 109 [2020-10-27 20:33:23,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 90.5s TimeCoverageRelationStatistics Valid=725, Invalid=1912, Unknown=15, NotChecked=0, Total=2652 [2020-10-27 20:33:23,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-27 20:33:23,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 76. [2020-10-27 20:33:23,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-27 20:33:23,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 88 transitions. [2020-10-27 20:33:23,875 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 88 transitions. Word has length 66 [2020-10-27 20:33:23,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:33:23,876 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 88 transitions. [2020-10-27 20:33:23,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 20:33:23,876 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 88 transitions. [2020-10-27 20:33:23,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 20:33:23,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:33:23,879 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 12, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:33:23,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 20:33:23,879 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:33:23,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:33:23,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1616530680, now seen corresponding path program 11 times [2020-10-27 20:33:23,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:33:23,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781974582] [2020-10-27 20:33:23,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:33:23,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:23,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:23,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:24,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:24,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:24,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:24,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:24,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:24,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:24,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:28,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:28,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 20:33:28,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 20:33:28,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 20:33:28,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:28,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 20:33:28,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:33:28,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 20:33:28,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:34,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:33:34,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:34,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:34,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:34,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:33:34,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:34,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:33:34,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:34,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:33:34,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:34,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:33:34,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:34,193 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 591 refuted. 3 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-27 20:33:34,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781974582] [2020-10-27 20:33:34,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:33:34,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 20:33:34,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575127177] [2020-10-27 20:33:34,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 20:33:34,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:33:34,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 20:33:34,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=326, Unknown=2, NotChecked=0, Total=380 [2020-10-27 20:33:34,195 INFO L87 Difference]: Start difference. First operand 76 states and 88 transitions. Second operand 20 states. [2020-10-27 20:33:35,091 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2020-10-27 20:33:35,515 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-10-27 20:33:35,904 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-10-27 20:33:36,283 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2020-10-27 20:33:36,900 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 56 [2020-10-27 20:33:41,529 WARN L193 SmtUtils]: Spent 2.28 s on a formula simplification. DAG size of input: 90 DAG size of output: 60 [2020-10-27 20:33:42,648 WARN L193 SmtUtils]: Spent 703.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 56 [2020-10-27 20:33:43,386 WARN L193 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 60 [2020-10-27 20:33:44,624 WARN L193 SmtUtils]: Spent 681.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 56 [2020-10-27 20:33:45,557 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 60 [2020-10-27 20:33:47,201 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 56 [2020-10-27 20:33:48,617 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 60 [2020-10-27 20:33:52,895 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 126 DAG size of output: 56 [2020-10-27 20:33:54,307 WARN L193 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 60 [2020-10-27 20:33:56,152 WARN L193 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 180 DAG size of output: 60 [2020-10-27 20:33:59,765 WARN L193 SmtUtils]: Spent 1.90 s on a formula simplification. DAG size of input: 136 DAG size of output: 56