/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-fpi/s5lif.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:42:57,511 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:42:57,517 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:42:57,586 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:42:57,587 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:42:57,595 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:42:57,599 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:42:57,605 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:42:57,610 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:42:57,618 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:42:57,620 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:42:57,622 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:42:57,623 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:42:57,627 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:42:57,629 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:42:57,631 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:42:57,633 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:42:57,636 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:42:57,646 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:42:57,677 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:42:57,680 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:42:57,683 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:42:57,687 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:42:57,690 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:42:57,699 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:42:57,700 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:42:57,700 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:42:57,703 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:42:57,704 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:42:57,705 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:42:57,706 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:42:57,707 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:42:57,709 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:42:57,711 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:42:57,712 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:42:57,712 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:42:57,713 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:42:57,714 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:42:57,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:42:57,716 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:42:57,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:42:57,718 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 14:42:57,746 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:42:57,747 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:42:57,748 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:42:57,748 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:42:57,749 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:42:57,749 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:42:57,749 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:42:57,749 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:42:57,750 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:42:57,750 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:42:57,750 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:42:57,750 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:42:57,751 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:42:57,751 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:42:57,751 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:42:57,751 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:42:57,752 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:42:57,752 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:42:57,752 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:42:57,752 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:42:57,753 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:42:57,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:42:57,753 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:42:57,753 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:42:57,754 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:42:57,754 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:42:57,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:42:57,754 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:42:57,754 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:42:57,755 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:42:58,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:42:58,291 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:42:58,295 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:42:58,297 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:42:58,297 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:42:58,298 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s5lif.c [2020-10-27 14:42:58,408 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c81c5b449/6b1a7ecf95644bf3bf6d1eea9f8a16bb/FLAG21cf6a0d7 [2020-10-27 14:42:59,027 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:42:59,027 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/s5lif.c [2020-10-27 14:42:59,036 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c81c5b449/6b1a7ecf95644bf3bf6d1eea9f8a16bb/FLAG21cf6a0d7 [2020-10-27 14:42:59,409 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c81c5b449/6b1a7ecf95644bf3bf6d1eea9f8a16bb [2020-10-27 14:42:59,416 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:42:59,427 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:42:59,431 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:42:59,431 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:42:59,436 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:42:59,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:42:59" (1/1) ... [2020-10-27 14:42:59,443 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cf0c142 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:42:59, skipping insertion in model container [2020-10-27 14:42:59,444 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:42:59" (1/1) ... [2020-10-27 14:42:59,452 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:42:59,474 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:42:59,664 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:42:59,672 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:42:59,695 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:42:59,714 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:42:59,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:42:59 WrapperNode [2020-10-27 14:42:59,715 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:42:59,716 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:42:59,716 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:42:59,716 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:42:59,730 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:42:59" (1/1) ... [2020-10-27 14:42:59,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:42:59" (1/1) ... [2020-10-27 14:42:59,738 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:42:59" (1/1) ... [2020-10-27 14:42:59,739 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:42:59" (1/1) ... [2020-10-27 14:42:59,749 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:42:59" (1/1) ... [2020-10-27 14:42:59,754 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:42:59" (1/1) ... [2020-10-27 14:42:59,756 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:42:59" (1/1) ... [2020-10-27 14:42:59,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:42:59,761 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:42:59,761 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:42:59,761 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:42:59,762 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:42:59" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:42:59,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:42:59,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:42:59,861 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:42:59,861 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 14:42:59,862 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:42:59,862 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:42:59,862 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:42:59,862 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:42:59,863 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:42:59,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:42:59,864 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 14:42:59,864 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:42:59,864 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:42:59,864 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 14:42:59,864 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:42:59,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 14:42:59,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:42:59,866 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:42:59,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:42:59,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:42:59,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:42:59,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:43:00,270 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:43:00,271 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-27 14:43:00,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:43:00 BoogieIcfgContainer [2020-10-27 14:43:00,273 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:43:00,275 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:43:00,275 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:43:00,279 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:43:00,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:42:59" (1/3) ... [2020-10-27 14:43:00,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e92cd3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:43:00, skipping insertion in model container [2020-10-27 14:43:00,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:42:59" (2/3) ... [2020-10-27 14:43:00,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e92cd3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:43:00, skipping insertion in model container [2020-10-27 14:43:00,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:43:00" (3/3) ... [2020-10-27 14:43:00,284 INFO L111 eAbstractionObserver]: Analyzing ICFG s5lif.c [2020-10-27 14:43:00,297 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:43:00,302 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:43:00,317 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:43:00,353 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:43:00,354 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:43:00,354 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:43:00,354 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:43:00,354 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:43:00,367 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:43:00,367 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:43:00,368 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:43:00,401 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-27 14:43:00,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 14:43:00,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:43:00,409 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:43:00,409 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:43:00,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:43:00,416 INFO L82 PathProgramCache]: Analyzing trace with hash 371341983, now seen corresponding path program 1 times [2020-10-27 14:43:00,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:43:00,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570906747] [2020-10-27 14:43:00,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:43:00,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:00,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:00,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:00,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:00,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:01,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:01,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 14:43:01,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:43:01,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 950 [2020-10-27 14:43:01,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:01,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:01,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:43:01,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:01,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:43:01,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:43:01,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:01,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:01,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:01,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:43:01,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:01,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 14:43:01,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:01,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:01,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:01,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:01,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:43:01,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:43:01,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:01,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:01,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:01,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:01,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:43:01,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:43:01,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:43:01,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:01,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:01,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 14:43:01,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:01,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:01,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:43:01,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570906747] [2020-10-27 14:43:01,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:43:01,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:43:01,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132899683] [2020-10-27 14:43:01,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:43:01,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:43:01,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:43:01,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:43:01,732 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-10-27 14:43:01,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:43:01,930 INFO L93 Difference]: Finished difference Result 65 states and 83 transitions. [2020-10-27 14:43:01,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:43:01,932 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-10-27 14:43:01,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:43:01,941 INFO L225 Difference]: With dead ends: 65 [2020-10-27 14:43:01,942 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 14:43:01,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:43:01,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 14:43:01,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-27 14:43:01,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 14:43:02,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-27 14:43:02,002 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 24 [2020-10-27 14:43:02,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:43:02,003 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-27 14:43:02,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:43:02,003 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-27 14:43:02,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 14:43:02,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:43:02,005 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:43:02,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:43:02,005 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:43:02,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:43:02,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1793608214, now seen corresponding path program 1 times [2020-10-27 14:43:02,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:43:02,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253869065] [2020-10-27 14:43:02,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:43:02,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:02,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:02,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:02,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:02,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:02,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 14:43:02,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:43:02,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 666 [2020-10-27 14:43:02,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:02,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:43:02,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:43:02,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:43:02,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 21 [2020-10-27 14:43:02,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:43:02,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:02,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:02,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:02,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:43:02,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:02,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 14:43:02,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:02,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:02,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:02,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:02,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:02,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:43:02,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:02,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:02,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:02,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:43:02,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:02,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:43:02,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:02,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:43:02,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:02,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:43:02,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:43:02,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:43:02,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253869065] [2020-10-27 14:43:02,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:43:02,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 14:43:02,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105126728] [2020-10-27 14:43:02,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:43:02,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:43:02,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:43:02,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:43:02,858 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 5 states. [2020-10-27 14:43:03,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:43:03,028 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2020-10-27 14:43:03,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:43:03,029 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-27 14:43:03,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:43:03,030 INFO L225 Difference]: With dead ends: 46 [2020-10-27 14:43:03,031 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 14:43:03,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:43:03,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 14:43:03,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-27 14:43:03,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 14:43:03,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-27 14:43:03,042 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 24 [2020-10-27 14:43:03,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:43:03,043 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-27 14:43:03,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:43:03,043 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-27 14:43:03,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 14:43:03,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:43:03,044 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:43:03,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:43:03,045 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:43:03,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:43:03,046 INFO L82 PathProgramCache]: Analyzing trace with hash -2090381425, now seen corresponding path program 1 times [2020-10-27 14:43:03,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:43:03,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047953794] [2020-10-27 14:43:03,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:43:03,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:03,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:03,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:03,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:03,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:04,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:04,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:04,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:04,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:06,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:06,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 14:43:06,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:43:06,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3464 [2020-10-27 14:43:06,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:06,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:43:06,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:43:06,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 14:43:06,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:06,825 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2020-10-27 14:43:07,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:43:07,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:07,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:07,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:07,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:43:07,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:07,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 14:43:07,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:07,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:07,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:07,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:07,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:07,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:43:07,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:07,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:07,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:07,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:43:07,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:07,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:43:07,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:07,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:07,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:07,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:07,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:07,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:43:07,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047953794] [2020-10-27 14:43:07,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:43:07,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:43:07,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289053253] [2020-10-27 14:43:07,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:43:07,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:43:07,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:43:07,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:43:07,304 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 16 states. [2020-10-27 14:43:08,075 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 39 [2020-10-27 14:43:08,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:43:08,774 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-10-27 14:43:08,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:43:08,775 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2020-10-27 14:43:08,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:43:08,776 INFO L225 Difference]: With dead ends: 52 [2020-10-27 14:43:08,776 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 14:43:08,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:43:08,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 14:43:08,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2020-10-27 14:43:08,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 14:43:08,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-27 14:43:08,787 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 31 [2020-10-27 14:43:08,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:43:08,787 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-27 14:43:08,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:43:08,787 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-27 14:43:08,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 14:43:08,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:43:08,789 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:43:08,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:43:08,789 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:43:08,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:43:08,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1617779857, now seen corresponding path program 1 times [2020-10-27 14:43:08,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:43:08,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701030717] [2020-10-27 14:43:08,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:43:08,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:08,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:08,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:08,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:09,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:10,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:10,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 14:43:10,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:43:10,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1316 [2020-10-27 14:43:10,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:10,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:43:10,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:43:10,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:43:10,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:10,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:43:10,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:10,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:10,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:10,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:43:10,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:10,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:43:10,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:10,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:10,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:10,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:10,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:10,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:43:10,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:10,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:10,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:10,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:43:10,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:10,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:43:10,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:10,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:10,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:10,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:10,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:10,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:43:10,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701030717] [2020-10-27 14:43:10,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:43:10,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:43:10,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689438455] [2020-10-27 14:43:10,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:43:10,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:43:10,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:43:10,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:43:10,332 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 11 states. [2020-10-27 14:43:10,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:43:10,780 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2020-10-27 14:43:10,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:43:10,780 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 14:43:10,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:43:10,782 INFO L225 Difference]: With dead ends: 67 [2020-10-27 14:43:10,782 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 14:43:10,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:43:10,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 14:43:10,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 41. [2020-10-27 14:43:10,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 14:43:10,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-10-27 14:43:10,793 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 31 [2020-10-27 14:43:10,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:43:10,793 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-10-27 14:43:10,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:43:10,793 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-10-27 14:43:10,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 14:43:10,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:43:10,795 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:43:10,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:43:10,795 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:43:10,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:43:10,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1912294515, now seen corresponding path program 2 times [2020-10-27 14:43:10,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:43:10,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523526460] [2020-10-27 14:43:10,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:43:10,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:10,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:10,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:11,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:11,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 14:43:11,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:43:11,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 801 [2020-10-27 14:43:11,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:11,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:43:11,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 14:43:11,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 14:43:11,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:11,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:43:11,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:11,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:11,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:11,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:43:11,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:11,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:43:11,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:11,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:11,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:11,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:11,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:11,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:43:11,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:11,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:11,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:11,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:43:11,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:11,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:43:11,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:11,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:11,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:11,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:11,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:11,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:43:11,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523526460] [2020-10-27 14:43:11,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:43:11,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:43:11,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226858860] [2020-10-27 14:43:11,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:43:11,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:43:11,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:43:11,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:43:11,710 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 8 states. [2020-10-27 14:43:11,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:43:11,979 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2020-10-27 14:43:11,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:43:11,980 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-27 14:43:11,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:43:11,981 INFO L225 Difference]: With dead ends: 97 [2020-10-27 14:43:11,981 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 14:43:11,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:43:11,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 14:43:11,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 47. [2020-10-27 14:43:11,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 14:43:11,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-10-27 14:43:11,992 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 33 [2020-10-27 14:43:11,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:43:11,993 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-10-27 14:43:11,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:43:11,993 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-10-27 14:43:11,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 14:43:11,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:43:11,994 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:43:11,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:43:11,995 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:43:11,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:43:11,995 INFO L82 PathProgramCache]: Analyzing trace with hash 234001266, now seen corresponding path program 1 times [2020-10-27 14:43:11,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:43:11,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445127329] [2020-10-27 14:43:11,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:43:12,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:12,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:12,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:12,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:12,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:12,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:12,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:13,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:16,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:16,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 14:43:16,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:43:16,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4721 [2020-10-27 14:43:16,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:16,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:43:16,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 14:43:16,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:43:16,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:16,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:43:16,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:16,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:16,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:16,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:43:16,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:16,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:43:16,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:16,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:16,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:16,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:16,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:16,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:43:16,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:16,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:16,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:16,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:43:16,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:16,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:43:16,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:16,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:16,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:16,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:16,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:43:16,835 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:43:16,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445127329] [2020-10-27 14:43:16,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:43:16,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:43:16,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020171698] [2020-10-27 14:43:16,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:43:16,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:43:16,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:43:16,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:43:16,841 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 8 states. [2020-10-27 14:43:17,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:43:17,126 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2020-10-27 14:43:17,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:43:17,128 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-27 14:43:17,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:43:17,130 INFO L225 Difference]: With dead ends: 57 [2020-10-27 14:43:17,130 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 14:43:17,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:43:17,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 14:43:17,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 39. [2020-10-27 14:43:17,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 14:43:17,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-27 14:43:17,148 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 36 [2020-10-27 14:43:17,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:43:17,149 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-27 14:43:17,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:43:17,150 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-27 14:43:17,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 14:43:17,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:43:17,152 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:43:17,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:43:17,152 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:43:17,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:43:17,153 INFO L82 PathProgramCache]: Analyzing trace with hash -283658706, now seen corresponding path program 3 times [2020-10-27 14:43:17,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:43:17,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838024062] [2020-10-27 14:43:17,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:43:17,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:17,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:17,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:17,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:18,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:18,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:19,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:19,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:19,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:20,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:21,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:21,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:22,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:22,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:22,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 14:43:22,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 14:43:22,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 14:43:22,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:22,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:43:22,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:43:22,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:43:22,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:22,937 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-10-27 14:43:23,092 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-10-27 14:43:23,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:43:23,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:23,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:23,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:23,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:43:23,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:23,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:43:23,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:23,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:23,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:23,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:23,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:23,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:43:23,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:23,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:23,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:23,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:43:23,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:23,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:43:23,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:23,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:23,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:23,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:23,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:23,629 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:43:23,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838024062] [2020-10-27 14:43:23,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:43:23,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:43:23,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791629917] [2020-10-27 14:43:23,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:43:23,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:43:23,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:43:23,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:43:23,632 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 20 states. [2020-10-27 14:43:24,672 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2020-10-27 14:43:25,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:43:25,194 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2020-10-27 14:43:25,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:43:25,194 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2020-10-27 14:43:25,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:43:25,195 INFO L225 Difference]: With dead ends: 60 [2020-10-27 14:43:25,196 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 14:43:25,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:43:25,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 14:43:25,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2020-10-27 14:43:25,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 14:43:25,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-10-27 14:43:25,220 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 38 [2020-10-27 14:43:25,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:43:25,221 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-10-27 14:43:25,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:43:25,221 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-10-27 14:43:25,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 14:43:25,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:43:25,226 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:43:25,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:43:25,226 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:43:25,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:43:25,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1563522384, now seen corresponding path program 2 times [2020-10-27 14:43:25,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:43:25,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265853753] [2020-10-27 14:43:25,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:43:25,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:25,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:25,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:25,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:25,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:26,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:27,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:27,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:29,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:29,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 14:43:29,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:43:29,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3784 [2020-10-27 14:43:29,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:29,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:43:29,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:43:29,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 14:43:29,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:29,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:43:29,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:29,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:29,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:29,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:43:29,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:29,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:43:29,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:29,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:29,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:29,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:29,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:29,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:43:29,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:29,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:29,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:29,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:43:29,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:29,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:43:29,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:29,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:29,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:29,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:29,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:29,272 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:43:29,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265853753] [2020-10-27 14:43:29,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:43:29,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:43:29,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987479705] [2020-10-27 14:43:29,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:43:29,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:43:29,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:43:29,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:43:29,275 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 13 states. [2020-10-27 14:43:30,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:43:30,108 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2020-10-27 14:43:30,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:43:30,109 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-27 14:43:30,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:43:30,111 INFO L225 Difference]: With dead ends: 72 [2020-10-27 14:43:30,112 INFO L226 Difference]: Without dead ends: 65 [2020-10-27 14:43:30,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:43:30,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-27 14:43:30,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-10-27 14:43:30,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 14:43:30,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2020-10-27 14:43:30,125 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 38 [2020-10-27 14:43:30,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:43:30,125 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2020-10-27 14:43:30,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:43:30,125 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2020-10-27 14:43:30,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 14:43:30,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:43:30,127 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:43:30,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:43:30,127 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:43:30,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:43:30,127 INFO L82 PathProgramCache]: Analyzing trace with hash 2017163884, now seen corresponding path program 3 times [2020-10-27 14:43:30,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:43:30,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598336309] [2020-10-27 14:43:30,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:43:30,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:30,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:30,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:30,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:30,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:30,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:31,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:33,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:33,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 14:43:33,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:43:33,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3409 [2020-10-27 14:43:33,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:33,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:43:33,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:43:33,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 14:43:33,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:33,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:43:33,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:33,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:33,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:33,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:43:33,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:33,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:43:33,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:33,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:33,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:33,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:33,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:33,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:43:33,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:33,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:33,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:33,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:43:33,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:33,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:43:33,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:33,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:33,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:33,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:33,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:33,814 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:43:33,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598336309] [2020-10-27 14:43:33,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:43:33,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:43:33,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752194190] [2020-10-27 14:43:33,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:43:33,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:43:33,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:43:33,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:43:33,817 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 12 states. [2020-10-27 14:43:34,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:43:34,352 INFO L93 Difference]: Finished difference Result 74 states and 87 transitions. [2020-10-27 14:43:34,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:43:34,352 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-10-27 14:43:34,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:43:34,354 INFO L225 Difference]: With dead ends: 74 [2020-10-27 14:43:34,354 INFO L226 Difference]: Without dead ends: 58 [2020-10-27 14:43:34,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:43:34,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-27 14:43:34,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-27 14:43:34,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 14:43:34,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2020-10-27 14:43:34,376 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 38 [2020-10-27 14:43:34,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:43:34,377 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2020-10-27 14:43:34,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:43:34,377 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2020-10-27 14:43:34,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 14:43:34,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:43:34,382 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:43:34,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:43:34,383 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:43:34,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:43:34,386 INFO L82 PathProgramCache]: Analyzing trace with hash -818549140, now seen corresponding path program 4 times [2020-10-27 14:43:34,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:43:34,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118247725] [2020-10-27 14:43:34,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:43:34,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:34,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:34,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:35,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:35,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 14:43:35,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:43:35,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1060 [2020-10-27 14:43:35,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:35,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:43:35,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 14:43:35,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:43:35,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:35,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:43:35,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:35,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:35,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:35,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:43:35,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:35,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:43:35,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:35,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:35,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:35,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:35,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:35,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:43:35,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:35,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:35,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:35,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:43:35,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:35,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:43:35,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:35,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:35,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:35,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:35,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:35,594 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:43:35,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118247725] [2020-10-27 14:43:35,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:43:35,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:43:35,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557205555] [2020-10-27 14:43:35,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:43:35,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:43:35,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:43:35,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:43:35,598 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 10 states. [2020-10-27 14:43:35,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:43:35,925 INFO L93 Difference]: Finished difference Result 135 states and 160 transitions. [2020-10-27 14:43:35,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:43:35,926 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-27 14:43:35,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:43:35,927 INFO L225 Difference]: With dead ends: 135 [2020-10-27 14:43:35,927 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 14:43:35,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:43:35,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 14:43:35,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 58. [2020-10-27 14:43:35,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 14:43:35,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2020-10-27 14:43:35,952 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 40 [2020-10-27 14:43:35,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:43:35,952 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2020-10-27 14:43:35,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:43:35,953 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2020-10-27 14:43:35,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 14:43:35,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:43:35,955 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:43:35,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:43:35,956 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:43:35,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:43:35,957 INFO L82 PathProgramCache]: Analyzing trace with hash 451576945, now seen corresponding path program 5 times [2020-10-27 14:43:35,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:43:35,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032930060] [2020-10-27 14:43:35,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:43:35,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:35,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:36,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:36,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:36,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:36,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:36,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:36,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:36,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:37,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:37,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:37,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:37,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:38,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:38,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:38,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:38,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:40,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:40,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:40,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:40,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 14:43:40,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-27 14:43:40,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:43:40,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:40,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:43:40,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 14:43:40,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 14:43:40,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:41,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:43:41,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:41,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:41,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:41,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:43:41,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:41,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:43:41,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:41,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:41,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:41,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:41,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:41,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:43:41,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:41,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:41,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:41,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:43:41,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:41,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:43:41,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:41,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:41,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:41,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:41,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:41,269 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 14:43:41,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032930060] [2020-10-27 14:43:41,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:43:41,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:43:41,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745434870] [2020-10-27 14:43:41,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:43:41,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:43:41,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:43:41,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:43:41,272 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand 16 states. [2020-10-27 14:43:43,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:43:43,048 INFO L93 Difference]: Finished difference Result 168 states and 202 transitions. [2020-10-27 14:43:43,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 14:43:43,049 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-10-27 14:43:43,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:43:43,051 INFO L225 Difference]: With dead ends: 168 [2020-10-27 14:43:43,051 INFO L226 Difference]: Without dead ends: 161 [2020-10-27 14:43:43,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=409, Invalid=1943, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 14:43:43,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-27 14:43:43,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 66. [2020-10-27 14:43:43,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-27 14:43:43,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2020-10-27 14:43:43,068 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 43 [2020-10-27 14:43:43,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:43:43,069 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2020-10-27 14:43:43,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:43:43,069 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2020-10-27 14:43:43,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:43:43,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:43:43,070 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:43:43,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:43:43,070 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:43:43,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:43:43,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1368274927, now seen corresponding path program 6 times [2020-10-27 14:43:43,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:43:43,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684116396] [2020-10-27 14:43:43,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:43:43,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:43,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:43,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:43,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:44,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:44,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:44,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:45,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:45,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:46,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:46,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:46,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:47,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:47,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:48,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:48,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:48,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:43:48,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 14:43:48,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5099 [2020-10-27 14:43:48,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:48,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:43:48,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:43:48,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 14:43:48,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:49,541 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-10-27 14:43:50,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:43:50,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:50,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:50,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:50,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:43:50,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:50,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:43:50,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:50,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:50,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:50,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:50,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:50,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:43:50,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:50,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:50,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:50,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:43:50,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:50,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:43:50,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:50,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:50,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:50,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:50,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:50,485 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:43:50,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684116396] [2020-10-27 14:43:50,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:43:50,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:43:50,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959575411] [2020-10-27 14:43:50,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:43:50,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:43:50,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:43:50,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:43:50,487 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand 27 states. [2020-10-27 14:43:51,788 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-10-27 14:43:52,153 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2020-10-27 14:43:52,878 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2020-10-27 14:43:53,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:43:53,434 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2020-10-27 14:43:53,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 14:43:53,434 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 45 [2020-10-27 14:43:53,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:43:53,436 INFO L225 Difference]: With dead ends: 104 [2020-10-27 14:43:53,436 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 14:43:53,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=237, Invalid=1925, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 14:43:53,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 14:43:53,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 77. [2020-10-27 14:43:53,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 14:43:53,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 93 transitions. [2020-10-27 14:43:53,454 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 93 transitions. Word has length 45 [2020-10-27 14:43:53,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:43:53,454 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 93 transitions. [2020-10-27 14:43:53,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:43:53,454 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 93 transitions. [2020-10-27 14:43:53,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:43:53,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:43:53,455 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:43:53,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:43:53,456 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:43:53,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:43:53,456 INFO L82 PathProgramCache]: Analyzing trace with hash -220072975, now seen corresponding path program 4 times [2020-10-27 14:43:53,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:43:53,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145665269] [2020-10-27 14:43:53,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:43:53,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:53,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:53,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:53,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:53,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:54,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:54,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:55,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:55,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:55,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:57,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:57,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:57,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:58,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:58,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:43:58,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 14:43:58,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:43:58,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:58,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:43:58,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:43:58,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:43:58,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:58,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:43:58,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:58,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:58,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:58,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:43:58,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:58,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:43:58,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:58,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:58,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:58,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:58,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:58,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:43:58,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:58,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:58,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:43:58,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:43:58,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:43:58,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:43:58,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:43:58,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:43:58,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:43:58,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:43:58,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:43:58,743 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-27 14:43:58,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145665269] [2020-10-27 14:43:58,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:43:58,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:43:58,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349744599] [2020-10-27 14:43:58,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:43:58,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:43:58,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:43:58,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:43:58,745 INFO L87 Difference]: Start difference. First operand 77 states and 93 transitions. Second operand 11 states. [2020-10-27 14:43:59,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:43:59,101 INFO L93 Difference]: Finished difference Result 96 states and 113 transitions. [2020-10-27 14:43:59,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:43:59,101 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-10-27 14:43:59,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:43:59,102 INFO L225 Difference]: With dead ends: 96 [2020-10-27 14:43:59,102 INFO L226 Difference]: Without dead ends: 81 [2020-10-27 14:43:59,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:43:59,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-27 14:43:59,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2020-10-27 14:43:59,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 14:43:59,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 93 transitions. [2020-10-27 14:43:59,117 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 93 transitions. Word has length 45 [2020-10-27 14:43:59,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:43:59,118 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 93 transitions. [2020-10-27 14:43:59,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:43:59,118 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 93 transitions. [2020-10-27 14:43:59,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:43:59,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:43:59,119 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:43:59,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:43:59,119 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:43:59,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:43:59,120 INFO L82 PathProgramCache]: Analyzing trace with hash 550626477, now seen corresponding path program 5 times [2020-10-27 14:43:59,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:43:59,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145562126] [2020-10-27 14:43:59,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:43:59,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:43:59,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:59,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:59,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:43:59,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:00,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:00,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:00,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:00,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:02,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:02,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:03,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:04,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:04,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:04,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:44:04,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 14:44:04,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:44:04,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:04,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:44:04,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:44:04,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:44:04,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:04,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:44:04,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:04,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:04,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:04,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:44:04,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:04,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:44:04,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:04,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:04,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:04,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:04,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:04,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:44:04,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:04,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:04,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:04,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:44:04,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:04,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:44:04,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:04,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:04,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:04,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:04,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:04,688 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:44:04,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145562126] [2020-10-27 14:44:04,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:44:04,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:44:04,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678595590] [2020-10-27 14:44:04,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:44:04,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:44:04,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:44:04,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:44:04,690 INFO L87 Difference]: Start difference. First operand 77 states and 93 transitions. Second operand 18 states. [2020-10-27 14:44:05,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:44:05,964 INFO L93 Difference]: Finished difference Result 117 states and 135 transitions. [2020-10-27 14:44:05,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:44:05,965 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-10-27 14:44:05,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:44:05,967 INFO L225 Difference]: With dead ends: 117 [2020-10-27 14:44:05,967 INFO L226 Difference]: Without dead ends: 102 [2020-10-27 14:44:05,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=226, Invalid=964, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:44:05,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-27 14:44:05,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 74. [2020-10-27 14:44:05,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 14:44:05,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 89 transitions. [2020-10-27 14:44:05,985 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 89 transitions. Word has length 45 [2020-10-27 14:44:05,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:44:05,985 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 89 transitions. [2020-10-27 14:44:05,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:44:05,985 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 89 transitions. [2020-10-27 14:44:05,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:44:05,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:44:05,986 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:44:05,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:44:05,986 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:44:05,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:44:05,987 INFO L82 PathProgramCache]: Analyzing trace with hash -437163407, now seen corresponding path program 6 times [2020-10-27 14:44:05,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:44:05,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660471517] [2020-10-27 14:44:05,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:44:06,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:06,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:06,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:06,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:06,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:06,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:06,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:06,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:07,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:10,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:10,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:44:10,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:44:10,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4928 [2020-10-27 14:44:10,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:10,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:44:10,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:44:10,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:44:10,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:11,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:44:11,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:11,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:11,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:11,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:44:11,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:11,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:44:11,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:11,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:11,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:11,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:11,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:11,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:44:11,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:11,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:11,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:11,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:44:11,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:11,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:44:11,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:11,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:11,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:11,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:11,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:11,362 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 14:44:11,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660471517] [2020-10-27 14:44:11,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:44:11,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:44:11,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555543770] [2020-10-27 14:44:11,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:44:11,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:44:11,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:44:11,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:44:11,364 INFO L87 Difference]: Start difference. First operand 74 states and 89 transitions. Second operand 15 states. [2020-10-27 14:44:12,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:44:12,149 INFO L93 Difference]: Finished difference Result 100 states and 118 transitions. [2020-10-27 14:44:12,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:44:12,150 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2020-10-27 14:44:12,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:44:12,151 INFO L225 Difference]: With dead ends: 100 [2020-10-27 14:44:12,151 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 14:44:12,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:44:12,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 14:44:12,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2020-10-27 14:44:12,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-27 14:44:12,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 96 transitions. [2020-10-27 14:44:12,166 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 96 transitions. Word has length 45 [2020-10-27 14:44:12,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:44:12,166 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 96 transitions. [2020-10-27 14:44:12,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:44:12,166 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 96 transitions. [2020-10-27 14:44:12,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 14:44:12,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:44:12,167 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:44:12,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:44:12,167 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:44:12,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:44:12,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1846739949, now seen corresponding path program 7 times [2020-10-27 14:44:12,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:44:12,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064023497] [2020-10-27 14:44:12,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:44:12,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:12,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:12,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:13,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:13,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 14:44:13,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:44:13,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1300 [2020-10-27 14:44:13,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:13,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:44:13,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 14:44:13,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 14:44:13,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:13,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:44:13,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:13,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:13,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:13,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:44:13,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:13,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:44:13,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:13,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:13,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:13,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:13,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:13,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:44:13,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:13,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:13,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:13,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:44:13,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:13,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:44:13,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:13,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:13,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:13,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:13,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:13,641 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 14:44:13,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064023497] [2020-10-27 14:44:13,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:44:13,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:44:13,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48976864] [2020-10-27 14:44:13,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:44:13,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:44:13,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:44:13,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:44:13,649 INFO L87 Difference]: Start difference. First operand 80 states and 96 transitions. Second operand 12 states. [2020-10-27 14:44:14,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:44:14,276 INFO L93 Difference]: Finished difference Result 193 states and 230 transitions. [2020-10-27 14:44:14,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:44:14,276 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-27 14:44:14,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:44:14,278 INFO L225 Difference]: With dead ends: 193 [2020-10-27 14:44:14,278 INFO L226 Difference]: Without dead ends: 125 [2020-10-27 14:44:14,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:44:14,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-27 14:44:14,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 82. [2020-10-27 14:44:14,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 14:44:14,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 96 transitions. [2020-10-27 14:44:14,299 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 96 transitions. Word has length 47 [2020-10-27 14:44:14,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:44:14,300 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 96 transitions. [2020-10-27 14:44:14,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:44:14,300 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 96 transitions. [2020-10-27 14:44:14,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 14:44:14,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:44:14,301 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:44:14,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:44:14,301 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:44:14,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:44:14,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1003714415, now seen corresponding path program 8 times [2020-10-27 14:44:14,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:44:14,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024540552] [2020-10-27 14:44:14,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:44:14,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:14,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:14,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:15,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:15,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:15,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:16,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:16,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:16,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:17,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:17,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:17,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:18,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:18,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:19,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:19,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:19,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 14:44:19,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 14:44:19,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-27 14:44:19,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:19,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 14:44:19,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:44:19,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 14:44:19,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:20,005 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2020-10-27 14:44:20,149 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2020-10-27 14:44:20,308 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2020-10-27 14:44:20,450 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-10-27 14:44:20,630 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2020-10-27 14:44:22,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:44:22,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:22,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:22,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:22,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:44:22,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:22,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:44:22,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:22,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:22,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:22,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:22,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:22,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:44:22,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:22,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:22,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:22,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:44:22,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:22,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:44:22,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:22,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:22,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:22,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:22,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:22,039 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:44:22,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024540552] [2020-10-27 14:44:22,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:44:22,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:44:22,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384827886] [2020-10-27 14:44:22,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:44:22,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:44:22,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:44:22,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=646, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:44:22,042 INFO L87 Difference]: Start difference. First operand 82 states and 96 transitions. Second operand 27 states. [2020-10-27 14:44:22,429 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 36 [2020-10-27 14:44:22,950 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-10-27 14:44:23,610 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 58 [2020-10-27 14:44:23,800 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2020-10-27 14:44:24,011 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2020-10-27 14:44:24,224 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2020-10-27 14:44:24,565 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2020-10-27 14:44:24,958 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 56 [2020-10-27 14:44:25,129 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2020-10-27 14:44:25,689 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2020-10-27 14:44:25,906 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2020-10-27 14:44:26,511 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 47 [2020-10-27 14:44:27,468 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 54 [2020-10-27 14:44:28,184 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 29 [2020-10-27 14:44:28,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:44:28,497 INFO L93 Difference]: Finished difference Result 96 states and 111 transitions. [2020-10-27 14:44:28,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 14:44:28,498 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 47 [2020-10-27 14:44:28,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:44:28,499 INFO L225 Difference]: With dead ends: 96 [2020-10-27 14:44:28,499 INFO L226 Difference]: Without dead ends: 81 [2020-10-27 14:44:28,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=340, Invalid=3200, Unknown=0, NotChecked=0, Total=3540 [2020-10-27 14:44:28,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-27 14:44:28,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 69. [2020-10-27 14:44:28,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 14:44:28,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2020-10-27 14:44:28,511 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 47 [2020-10-27 14:44:28,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:44:28,511 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2020-10-27 14:44:28,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:44:28,511 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2020-10-27 14:44:28,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 14:44:28,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:44:28,512 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:44:28,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:44:28,512 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:44:28,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:44:28,513 INFO L82 PathProgramCache]: Analyzing trace with hash -709469432, now seen corresponding path program 7 times [2020-10-27 14:44:28,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:44:28,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010887617] [2020-10-27 14:44:28,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:44:28,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:28,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:28,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:28,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:28,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:28,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:29,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:29,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:29,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:29,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:29,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:30,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:30,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:30,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:30,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:31,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:31,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:31,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:32,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:33,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:33,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:33,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:33,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:33,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 14:44:33,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-27 14:44:33,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:44:33,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:33,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:44:33,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 14:44:33,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:44:33,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:33,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:44:33,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:33,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:33,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:33,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:44:33,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:33,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:44:33,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:33,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:33,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:33,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:33,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:33,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:44:33,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:33,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:33,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:33,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:44:33,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:33,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:44:33,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:33,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:33,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:33,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:33,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:33,679 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 14:44:33,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010887617] [2020-10-27 14:44:33,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:44:33,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:44:33,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796550698] [2020-10-27 14:44:33,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:44:33,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:44:33,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:44:33,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:44:33,685 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand 11 states. [2020-10-27 14:44:34,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:44:34,155 INFO L93 Difference]: Finished difference Result 95 states and 110 transitions. [2020-10-27 14:44:34,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:44:34,155 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-10-27 14:44:34,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:44:34,156 INFO L225 Difference]: With dead ends: 95 [2020-10-27 14:44:34,156 INFO L226 Difference]: Without dead ends: 88 [2020-10-27 14:44:34,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:44:34,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-27 14:44:34,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 57. [2020-10-27 14:44:34,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 14:44:34,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2020-10-27 14:44:34,173 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 48 [2020-10-27 14:44:34,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:44:34,174 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2020-10-27 14:44:34,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:44:34,174 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2020-10-27 14:44:34,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 14:44:34,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:44:34,175 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:44:34,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:44:34,175 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:44:34,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:44:34,176 INFO L82 PathProgramCache]: Analyzing trace with hash -2062803320, now seen corresponding path program 9 times [2020-10-27 14:44:34,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:44:34,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182527131] [2020-10-27 14:44:34,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:44:34,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:34,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:34,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:34,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:34,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:34,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:34,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:34,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:34,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:35,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:35,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:35,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:35,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:36,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:36,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:36,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:36,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:36,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:37,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:37,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:37,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:37,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:37,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:37,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:38,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:38,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:38,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:38,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:38,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:38,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:39,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:39,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 14:44:39,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 29 [2020-10-27 14:44:39,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:44:39,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:39,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:44:39,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 14:44:39,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:44:39,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:39,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:44:39,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:39,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:39,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:39,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:44:39,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:39,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:44:39,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:39,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:39,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:39,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:39,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:39,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:44:39,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:39,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:39,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:39,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:44:39,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:39,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:44:39,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:39,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:39,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:39,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:39,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:39,626 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 14:44:39,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182527131] [2020-10-27 14:44:39,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:44:39,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:44:39,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763270422] [2020-10-27 14:44:39,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:44:39,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:44:39,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:44:39,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:44:39,636 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 18 states. [2020-10-27 14:44:40,665 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2020-10-27 14:44:41,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:44:41,165 INFO L93 Difference]: Finished difference Result 84 states and 96 transitions. [2020-10-27 14:44:41,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:44:41,165 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-10-27 14:44:41,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:44:41,167 INFO L225 Difference]: With dead ends: 84 [2020-10-27 14:44:41,167 INFO L226 Difference]: Without dead ends: 77 [2020-10-27 14:44:41,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=378, Invalid=1104, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:44:41,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-27 14:44:41,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 59. [2020-10-27 14:44:41,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 14:44:41,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2020-10-27 14:44:41,182 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 50 [2020-10-27 14:44:41,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:44:41,182 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2020-10-27 14:44:41,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:44:41,182 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2020-10-27 14:44:41,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 14:44:41,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:44:41,183 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:44:41,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:44:41,183 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:44:41,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:44:41,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1179539386, now seen corresponding path program 10 times [2020-10-27 14:44:41,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:44:41,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739324207] [2020-10-27 14:44:41,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:44:41,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:41,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:41,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:42,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:42,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:43,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:43,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:44,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:45,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:45,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:45,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:46,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:46,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 14:44:46,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 14:44:46,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:44:46,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:46,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 14:44:46,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:44:46,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 14:44:46,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:46,750 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-10-27 14:44:47,240 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2020-10-27 14:44:47,380 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2020-10-27 14:44:47,527 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2020-10-27 14:44:47,871 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2020-10-27 14:44:48,108 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-10-27 14:44:48,360 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-10-27 14:44:48,538 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-10-27 14:44:48,709 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-10-27 14:44:49,016 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2020-10-27 14:44:50,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:44:50,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:50,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:50,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:50,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:44:50,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:50,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:44:50,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:50,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:50,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:50,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:50,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:50,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:44:50,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:50,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:50,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:44:50,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:44:50,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:44:50,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:44:50,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:44:50,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:44:50,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:44:50,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:44:50,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:44:50,266 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:44:50,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739324207] [2020-10-27 14:44:50,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:44:50,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 14:44:50,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235205780] [2020-10-27 14:44:50,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 14:44:50,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:44:50,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 14:44:50,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=963, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:44:50,268 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand 34 states. [2020-10-27 14:44:50,958 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 78 [2020-10-27 14:44:51,137 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-10-27 14:44:52,177 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 78 [2020-10-27 14:44:52,614 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 42 [2020-10-27 14:44:53,073 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 62 [2020-10-27 14:44:53,350 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 42 [2020-10-27 14:44:53,671 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 89 [2020-10-27 14:44:53,907 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 39 [2020-10-27 14:44:54,250 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 75 [2020-10-27 14:44:54,635 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2020-10-27 14:44:54,920 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 75 [2020-10-27 14:44:55,233 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2020-10-27 14:44:55,489 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2020-10-27 14:44:55,949 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 78 [2020-10-27 14:44:56,381 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 102 [2020-10-27 14:44:56,678 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2020-10-27 14:44:57,182 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 53 [2020-10-27 14:44:57,418 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 55 [2020-10-27 14:44:57,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:44:57,737 INFO L93 Difference]: Finished difference Result 115 states and 134 transitions. [2020-10-27 14:44:57,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 14:44:57,737 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 52 [2020-10-27 14:44:57,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:44:57,738 INFO L225 Difference]: With dead ends: 115 [2020-10-27 14:44:57,738 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 14:44:57,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=563, Invalid=3097, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 14:44:57,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 14:44:57,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 70. [2020-10-27 14:44:57,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-27 14:44:57,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2020-10-27 14:44:57,759 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 52 [2020-10-27 14:44:57,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:44:57,759 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2020-10-27 14:44:57,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 14:44:57,760 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2020-10-27 14:44:57,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 14:44:57,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:44:57,767 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:44:57,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:44:57,768 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:44:57,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:44:57,769 INFO L82 PathProgramCache]: Analyzing trace with hash -960684668, now seen corresponding path program 8 times [2020-10-27 14:44:57,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:44:57,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422188315] [2020-10-27 14:44:57,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:44:57,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:44:57,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:57,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:57,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:58,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:58,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:58,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:59,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:44:59,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:00,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:00,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:01,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:01,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:01,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:02,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:02,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 14:45:02,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 14:45:02,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:45:02,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:02,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:45:02,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:45:02,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 14:45:02,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:03,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:45:03,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:03,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:03,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:03,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:45:03,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:45:03,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:45:03,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:03,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:45:03,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:45:03,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:45:03,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:03,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:45:03,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:03,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:03,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:03,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:45:03,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:45:03,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:45:03,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:03,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:45:03,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:45:03,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:45:03,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:03,558 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 27 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:45:03,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422188315] [2020-10-27 14:45:03,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:45:03,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:45:03,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315471334] [2020-10-27 14:45:03,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:45:03,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:45:03,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:45:03,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:45:03,561 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand 20 states. [2020-10-27 14:45:04,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:45:04,924 INFO L93 Difference]: Finished difference Result 100 states and 116 transitions. [2020-10-27 14:45:04,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:45:04,925 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2020-10-27 14:45:04,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:45:04,926 INFO L225 Difference]: With dead ends: 100 [2020-10-27 14:45:04,926 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 14:45:04,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=278, Invalid=1204, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:45:04,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 14:45:04,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 73. [2020-10-27 14:45:04,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 14:45:04,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 86 transitions. [2020-10-27 14:45:04,946 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 86 transitions. Word has length 52 [2020-10-27 14:45:04,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:45:04,946 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 86 transitions. [2020-10-27 14:45:04,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:45:04,947 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 86 transitions. [2020-10-27 14:45:04,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 14:45:04,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:45:04,947 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:45:04,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:45:04,948 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:45:04,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:45:04,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1038990776, now seen corresponding path program 9 times [2020-10-27 14:45:04,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:45:04,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671498972] [2020-10-27 14:45:04,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:45:04,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:04,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:05,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:05,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:05,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:06,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:06,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:08,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:08,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:08,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:08,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:09,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:09,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:09,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:09,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:09,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:09,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 14:45:09,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 14:45:09,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-27 14:45:09,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:09,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:45:09,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:45:09,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 14:45:09,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:10,343 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2020-10-27 14:45:10,673 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-10-27 14:45:10,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:45:10,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:10,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:10,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:10,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:45:10,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:45:10,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:45:10,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:10,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:45:10,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:45:10,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:45:10,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:10,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:45:10,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:10,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:10,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:10,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:45:10,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:45:10,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:45:10,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:10,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:45:10,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:45:10,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:45:10,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:10,983 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-27 14:45:10,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671498972] [2020-10-27 14:45:10,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:45:10,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:45:10,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934008156] [2020-10-27 14:45:10,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:45:10,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:45:10,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:45:10,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:45:10,985 INFO L87 Difference]: Start difference. First operand 73 states and 86 transitions. Second operand 19 states. [2020-10-27 14:45:12,038 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-10-27 14:45:12,353 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-10-27 14:45:12,589 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-10-27 14:45:12,729 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2020-10-27 14:45:13,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:45:13,205 INFO L93 Difference]: Finished difference Result 110 states and 127 transitions. [2020-10-27 14:45:13,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:45:13,209 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2020-10-27 14:45:13,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:45:13,210 INFO L225 Difference]: With dead ends: 110 [2020-10-27 14:45:13,210 INFO L226 Difference]: Without dead ends: 103 [2020-10-27 14:45:13,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=212, Invalid=1194, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:45:13,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-27 14:45:13,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 87. [2020-10-27 14:45:13,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-27 14:45:13,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 104 transitions. [2020-10-27 14:45:13,230 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 104 transitions. Word has length 52 [2020-10-27 14:45:13,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:45:13,230 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 104 transitions. [2020-10-27 14:45:13,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:45:13,230 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 104 transitions. [2020-10-27 14:45:13,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 14:45:13,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:45:13,231 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:45:13,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:45:13,231 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:45:13,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:45:13,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1689012476, now seen corresponding path program 10 times [2020-10-27 14:45:13,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:45:13,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778235305] [2020-10-27 14:45:13,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:45:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:13,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:13,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:13,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:13,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:14,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:14,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:14,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:15,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:17,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:18,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:18,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 14:45:18,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:45:18,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:45:18,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:18,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:45:18,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:45:18,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 14:45:18,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:18,547 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 34 [2020-10-27 14:45:18,738 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2020-10-27 14:45:19,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:45:19,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:19,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:19,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:19,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:45:19,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:45:19,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:45:19,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:19,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:45:19,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:45:19,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:45:19,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:45:19,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:45:19,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:19,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:19,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:19,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:45:19,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:45:19,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:45:19,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:19,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:45:19,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:45:19,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:45:19,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:19,048 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 14:45:19,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778235305] [2020-10-27 14:45:19,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:45:19,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:45:19,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898358913] [2020-10-27 14:45:19,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:45:19,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:45:19,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:45:19,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:45:19,050 INFO L87 Difference]: Start difference. First operand 87 states and 104 transitions. Second operand 20 states. [2020-10-27 14:45:19,671 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2020-10-27 14:45:20,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:45:20,541 INFO L93 Difference]: Finished difference Result 139 states and 162 transitions. [2020-10-27 14:45:20,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:45:20,543 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2020-10-27 14:45:20,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:45:20,544 INFO L225 Difference]: With dead ends: 139 [2020-10-27 14:45:20,544 INFO L226 Difference]: Without dead ends: 132 [2020-10-27 14:45:20,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=216, Invalid=1044, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:45:20,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-27 14:45:20,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 87. [2020-10-27 14:45:20,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-27 14:45:20,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 104 transitions. [2020-10-27 14:45:20,570 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 104 transitions. Word has length 52 [2020-10-27 14:45:20,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:45:20,570 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 104 transitions. [2020-10-27 14:45:20,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:45:20,570 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 104 transitions. [2020-10-27 14:45:20,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 14:45:20,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:45:20,571 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:45:20,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:45:20,571 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:45:20,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:45:20,571 INFO L82 PathProgramCache]: Analyzing trace with hash -843195386, now seen corresponding path program 11 times [2020-10-27 14:45:20,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:45:20,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1005348229] [2020-10-27 14:45:20,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:45:20,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:20,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:20,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:20,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:21,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:22,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:24,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:25,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:25,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 14:45:25,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:45:25,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:45:25,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:25,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:45:25,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 14:45:25,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 14:45:25,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:25,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:45:25,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:25,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:25,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:25,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:45:25,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:45:25,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:45:25,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:25,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:45:25,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:45:25,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:45:25,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:25,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:45:25,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:25,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:25,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:25,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:45:25,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:45:25,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:45:25,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:25,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:45:25,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:45:25,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:45:25,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:25,761 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 14:45:25,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1005348229] [2020-10-27 14:45:25,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:45:25,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:45:25,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776294371] [2020-10-27 14:45:25,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:45:25,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:45:25,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:45:25,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:45:25,762 INFO L87 Difference]: Start difference. First operand 87 states and 104 transitions. Second operand 14 states. [2020-10-27 14:45:26,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:45:26,391 INFO L93 Difference]: Finished difference Result 237 states and 284 transitions. [2020-10-27 14:45:26,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:45:26,392 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-10-27 14:45:26,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:45:26,394 INFO L225 Difference]: With dead ends: 237 [2020-10-27 14:45:26,394 INFO L226 Difference]: Without dead ends: 145 [2020-10-27 14:45:26,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:45:26,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-27 14:45:26,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 91. [2020-10-27 14:45:26,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 14:45:26,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2020-10-27 14:45:26,415 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 54 [2020-10-27 14:45:26,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:45:26,415 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2020-10-27 14:45:26,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:45:26,415 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2020-10-27 14:45:26,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 14:45:26,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:45:26,416 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:45:26,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:45:26,417 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:45:26,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:45:26,417 INFO L82 PathProgramCache]: Analyzing trace with hash -740835996, now seen corresponding path program 11 times [2020-10-27 14:45:26,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:45:26,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523836430] [2020-10-27 14:45:26,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:45:26,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:26,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:26,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:27,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:27,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:27,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:28,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:28,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:28,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:29,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:30,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:31,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:31,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:31,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 14:45:31,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:45:31,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 14:45:31,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:31,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:45:31,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:45:31,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 14:45:31,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:31,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:45:31,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:31,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:31,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:31,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:45:31,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:45:31,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:45:31,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:31,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:45:31,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:45:31,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:45:31,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:31,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:45:31,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:31,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:31,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:31,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:45:31,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:45:31,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:45:31,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:31,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:45:31,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:45:31,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:45:31,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:31,617 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-27 14:45:31,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523836430] [2020-10-27 14:45:31,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:45:31,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:45:31,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46520151] [2020-10-27 14:45:31,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:45:31,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:45:31,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:45:31,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:45:31,619 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand 14 states. [2020-10-27 14:45:32,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:45:32,271 INFO L93 Difference]: Finished difference Result 127 states and 146 transitions. [2020-10-27 14:45:32,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:45:32,272 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-10-27 14:45:32,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:45:32,273 INFO L225 Difference]: With dead ends: 127 [2020-10-27 14:45:32,273 INFO L226 Difference]: Without dead ends: 110 [2020-10-27 14:45:32,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:45:32,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-27 14:45:32,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 69. [2020-10-27 14:45:32,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 14:45:32,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2020-10-27 14:45:32,291 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 54 [2020-10-27 14:45:32,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:45:32,291 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2020-10-27 14:45:32,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:45:32,291 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2020-10-27 14:45:32,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 14:45:32,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:45:32,292 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:45:32,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:45:32,292 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:45:32,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:45:32,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1364016719, now seen corresponding path program 12 times [2020-10-27 14:45:32,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:45:32,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876937965] [2020-10-27 14:45:32,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:45:32,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:32,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:32,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:33,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:33,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:34,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:35,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:37,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:37,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:37,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 14:45:37,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:45:37,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 14:45:37,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:37,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 14:45:37,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:45:37,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 14:45:37,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:37,977 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2020-10-27 14:45:38,129 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-10-27 14:45:38,280 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-10-27 14:45:38,663 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 56 [2020-10-27 14:45:38,895 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 56 [2020-10-27 14:45:39,203 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 61 [2020-10-27 14:45:39,547 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 64 [2020-10-27 14:45:39,798 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 56 [2020-10-27 14:45:40,136 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 67 [2020-10-27 14:45:40,381 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 59 [2020-10-27 14:45:40,630 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 51 [2020-10-27 14:45:40,856 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 46 [2020-10-27 14:45:41,123 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 51 [2020-10-27 14:45:41,380 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 45 [2020-10-27 14:45:41,631 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 46 [2020-10-27 14:45:41,842 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2020-10-27 14:45:42,089 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 45 [2020-10-27 14:45:42,349 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 42 [2020-10-27 14:45:42,617 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 47 [2020-10-27 14:45:42,833 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 40 [2020-10-27 14:45:43,116 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 43 [2020-10-27 14:45:43,366 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 37 [2020-10-27 14:45:43,576 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2020-10-27 14:45:44,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:45:44,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:44,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:44,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:44,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:45:44,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:45:44,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:45:44,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:44,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:45:44,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:45:44,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:45:44,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:44,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:45:44,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:44,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:44,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:45:44,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:45:44,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:45:44,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:45:44,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:45:44,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:45:44,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:45:44,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:45:44,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:45:44,419 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 71 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:45:44,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876937965] [2020-10-27 14:45:44,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:45:44,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 14:45:44,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142573649] [2020-10-27 14:45:44,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 14:45:44,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:45:44,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 14:45:44,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1243, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:45:44,422 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand 38 states. [2020-10-27 14:45:45,267 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 42 [2020-10-27 14:45:45,551 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 37 [2020-10-27 14:45:45,869 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 52 [2020-10-27 14:45:46,184 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 47 [2020-10-27 14:45:46,504 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 52 [2020-10-27 14:45:46,803 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 47 [2020-10-27 14:45:47,129 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 74 [2020-10-27 14:45:47,352 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 42 [2020-10-27 14:45:47,596 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-10-27 14:45:48,022 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 48 [2020-10-27 14:45:48,261 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 51 [2020-10-27 14:45:48,533 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 53 [2020-10-27 14:45:48,809 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2020-10-27 14:45:49,262 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2020-10-27 14:45:49,683 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 70 [2020-10-27 14:45:50,048 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 73 [2020-10-27 14:45:50,569 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 80 [2020-10-27 14:45:50,981 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 72 [2020-10-27 14:45:51,360 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 69 [2020-10-27 14:45:51,875 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 78 [2020-10-27 14:45:52,131 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 41 [2020-10-27 14:45:52,407 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2020-10-27 14:45:52,698 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2020-10-27 14:45:52,965 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-10-27 14:45:53,248 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 42 [2020-10-27 14:45:53,747 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2020-10-27 14:45:54,024 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2020-10-27 14:45:54,289 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2020-10-27 14:45:54,731 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2020-10-27 14:45:55,258 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 87 [2020-10-27 14:45:55,608 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 63 [2020-10-27 14:45:55,881 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 51 [2020-10-27 14:45:56,214 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 61 [2020-10-27 14:45:56,680 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2020-10-27 14:45:57,036 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-10-27 14:45:57,248 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2020-10-27 14:45:57,541 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 59 [2020-10-27 14:45:58,030 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 51 [2020-10-27 14:45:58,273 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-10-27 14:45:58,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:45:58,729 INFO L93 Difference]: Finished difference Result 130 states and 152 transitions. [2020-10-27 14:45:58,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-27 14:45:58,730 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 59 [2020-10-27 14:45:58,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:45:58,731 INFO L225 Difference]: With dead ends: 130 [2020-10-27 14:45:58,732 INFO L226 Difference]: Without dead ends: 110 [2020-10-27 14:45:58,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=941, Invalid=6199, Unknown=0, NotChecked=0, Total=7140 [2020-10-27 14:45:58,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-27 14:45:58,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 75. [2020-10-27 14:45:58,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-27 14:45:58,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2020-10-27 14:45:58,758 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 59 [2020-10-27 14:45:58,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:45:58,758 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2020-10-27 14:45:58,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 14:45:58,759 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2020-10-27 14:45:58,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 14:45:58,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:45:58,759 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:45:58,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:45:58,760 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:45:58,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:45:58,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1230003213, now seen corresponding path program 12 times [2020-10-27 14:45:58,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:45:58,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980677485] [2020-10-27 14:45:58,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:45:58,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:45:58,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:58,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:58,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:59,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:59,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:45:59,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:01,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:01,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:02,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:02,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:02,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:02,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:02,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:02,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:03,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:03,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:46:03,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 14:46:03,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 14:46:03,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:46:03,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:46:03,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:46:03,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 14:46:03,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:46:03,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:46:04,437 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2020-10-27 14:46:05,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:46:05,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:46:05,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:05,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:46:05,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:46:05,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:46:05,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:46:05,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:46:05,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:46:05,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:46:05,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:46:05,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:46:05,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:46:05,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:46:05,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:05,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:46:05,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:46:05,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:46:05,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:46:05,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:46:05,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:46:05,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:46:05,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:46:05,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:46:05,040 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 39 proven. 37 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 14:46:05,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980677485] [2020-10-27 14:46:05,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:46:05,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:46:05,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984730314] [2020-10-27 14:46:05,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:46:05,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:46:05,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:46:05,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:46:05,042 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand 23 states. [2020-10-27 14:46:06,142 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-10-27 14:46:06,309 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2020-10-27 14:46:07,013 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2020-10-27 14:46:07,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:46:07,629 INFO L93 Difference]: Finished difference Result 106 states and 121 transitions. [2020-10-27 14:46:07,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 14:46:07,630 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 59 [2020-10-27 14:46:07,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:46:07,632 INFO L225 Difference]: With dead ends: 106 [2020-10-27 14:46:07,632 INFO L226 Difference]: Without dead ends: 87 [2020-10-27 14:46:07,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=414, Invalid=1842, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 14:46:07,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-27 14:46:07,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 69. [2020-10-27 14:46:07,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 14:46:07,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2020-10-27 14:46:07,655 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 59 [2020-10-27 14:46:07,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:46:07,655 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2020-10-27 14:46:07,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:46:07,655 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2020-10-27 14:46:07,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 14:46:07,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:46:07,656 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:46:07,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:46:07,656 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:46:07,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:46:07,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1007722543, now seen corresponding path program 13 times [2020-10-27 14:46:07,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:46:07,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62329900] [2020-10-27 14:46:07,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:46:07,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:46:07,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:07,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:07,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:08,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:09,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:11,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:12,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:46:12,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 14:46:12,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:46:12,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:46:12,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:46:12,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:46:12,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:46:12,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 14:46:12,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:46:13,126 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 31 [2020-10-27 14:46:13,513 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 42 [2020-10-27 14:46:13,724 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-10-27 14:46:14,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:46:14,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:46:14,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:14,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:46:14,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:46:14,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:46:14,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:46:14,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:46:14,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:46:14,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:46:14,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:46:14,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:46:14,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:46:14,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:46:14,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:14,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:46:14,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:46:14,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:46:14,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:46:14,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:46:14,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:46:14,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:46:14,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:46:14,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:46:14,148 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 31 proven. 43 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-27 14:46:14,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62329900] [2020-10-27 14:46:14,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:46:14,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:46:14,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096835113] [2020-10-27 14:46:14,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:46:14,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:46:14,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:46:14,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:46:14,150 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand 21 states. [2020-10-27 14:46:14,936 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 55 [2020-10-27 14:46:15,372 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-10-27 14:46:15,564 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-10-27 14:46:15,707 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-10-27 14:46:16,005 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2020-10-27 14:46:16,317 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-10-27 14:46:17,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:46:17,156 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2020-10-27 14:46:17,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:46:17,158 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 59 [2020-10-27 14:46:17,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:46:17,159 INFO L225 Difference]: With dead ends: 108 [2020-10-27 14:46:17,159 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 14:46:17,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=264, Invalid=1458, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 14:46:17,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 14:46:17,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 83. [2020-10-27 14:46:17,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 14:46:17,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2020-10-27 14:46:17,185 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 59 [2020-10-27 14:46:17,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:46:17,185 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2020-10-27 14:46:17,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:46:17,185 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2020-10-27 14:46:17,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 14:46:17,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:46:17,186 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:46:17,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:46:17,186 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:46:17,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:46:17,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1386648973, now seen corresponding path program 14 times [2020-10-27 14:46:17,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:46:17,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943710641] [2020-10-27 14:46:17,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:46:17,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:46:17,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:17,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:17,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:17,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:17,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:17,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:18,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:18,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:18,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:19,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:20,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:21,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:21,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:22,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:46:22,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 14:46:22,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 14:46:22,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:46:22,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:46:22,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:46:22,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:46:22,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 14:46:22,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:46:22,955 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 44 [2020-10-27 14:46:23,347 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2020-10-27 14:46:23,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:46:23,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:46:23,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:23,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:46:23,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:46:23,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:46:23,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:46:23,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:46:23,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:46:23,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:46:23,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:46:23,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:46:23,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:46:23,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:46:23,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:23,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:46:23,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:46:23,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:46:23,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:46:23,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:46:23,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:46:23,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:46:23,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:46:23,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:46:23,904 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 14:46:23,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943710641] [2020-10-27 14:46:23,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:46:23,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:46:23,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459558353] [2020-10-27 14:46:23,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:46:23,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:46:23,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:46:23,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:46:23,906 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand 22 states. [2020-10-27 14:46:24,412 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 30 [2020-10-27 14:46:24,596 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 40 [2020-10-27 14:46:24,882 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 65 [2020-10-27 14:46:25,129 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2020-10-27 14:46:25,320 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2020-10-27 14:46:26,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:46:26,232 INFO L93 Difference]: Finished difference Result 142 states and 163 transitions. [2020-10-27 14:46:26,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:46:26,234 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 59 [2020-10-27 14:46:26,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:46:26,235 INFO L225 Difference]: With dead ends: 142 [2020-10-27 14:46:26,235 INFO L226 Difference]: Without dead ends: 135 [2020-10-27 14:46:26,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=264, Invalid=1296, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 14:46:26,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-27 14:46:26,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 83. [2020-10-27 14:46:26,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 14:46:26,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2020-10-27 14:46:26,270 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 59 [2020-10-27 14:46:26,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:46:26,271 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2020-10-27 14:46:26,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:46:26,271 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2020-10-27 14:46:26,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 14:46:26,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:46:26,272 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:46:26,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:46:26,273 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:46:26,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:46:26,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1291630161, now seen corresponding path program 15 times [2020-10-27 14:46:26,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:46:26,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528042463] [2020-10-27 14:46:26,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:46:26,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:46:26,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:26,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:26,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:27,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:27,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:29,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:29,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:29,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:29,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:31,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:46:31,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 14:46:31,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:46:31,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 14:46:31,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:46:31,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:46:31,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:46:31,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 14:46:31,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:46:31,913 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 48 [2020-10-27 14:46:32,240 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 44 [2020-10-27 14:46:32,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:46:32,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:46:32,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:32,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:46:32,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:46:32,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:46:32,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:46:32,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:46:32,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:46:32,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:46:32,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:46:32,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:46:32,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 14:46:32,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:46:32,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:32,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:46:32,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:46:32,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:46:32,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:46:32,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:46:32,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:46:32,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:46:32,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:46:32,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:46:32,635 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-27 14:46:32,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528042463] [2020-10-27 14:46:32,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:46:32,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:46:32,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256613159] [2020-10-27 14:46:32,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:46:32,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:46:32,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:46:32,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:46:32,637 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand 21 states. [2020-10-27 14:46:33,130 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 36 [2020-10-27 14:46:33,414 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2020-10-27 14:46:33,760 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2020-10-27 14:46:34,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:46:34,133 INFO L93 Difference]: Finished difference Result 139 states and 164 transitions. [2020-10-27 14:46:34,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:46:34,134 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 59 [2020-10-27 14:46:34,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:46:34,135 INFO L225 Difference]: With dead ends: 139 [2020-10-27 14:46:34,135 INFO L226 Difference]: Without dead ends: 117 [2020-10-27 14:46:34,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=200, Invalid=856, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:46:34,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-27 14:46:34,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 89. [2020-10-27 14:46:34,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-27 14:46:34,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2020-10-27 14:46:34,165 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 59 [2020-10-27 14:46:34,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:46:34,165 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2020-10-27 14:46:34,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:46:34,166 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2020-10-27 14:46:34,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 14:46:34,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:46:34,166 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:46:34,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 14:46:34,167 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:46:34,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:46:34,167 INFO L82 PathProgramCache]: Analyzing trace with hash -859194545, now seen corresponding path program 16 times [2020-10-27 14:46:34,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:46:34,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452457619] [2020-10-27 14:46:34,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:46:34,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:46:34,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:34,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:34,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:35,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:35,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking...