/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:14:57,467 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:14:57,470 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:14:57,517 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:14:57,518 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:14:57,524 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:14:57,527 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:14:57,531 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:14:57,534 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:14:57,540 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:14:57,541 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:14:57,543 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:14:57,543 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:14:57,546 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:14:57,549 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:14:57,551 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:14:57,552 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:14:57,555 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:14:57,567 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:14:57,572 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:14:57,576 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:14:57,578 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:14:57,580 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:14:57,580 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:14:57,583 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:14:57,584 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:14:57,584 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:14:57,585 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:14:57,586 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:14:57,587 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:14:57,587 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:14:57,588 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:14:57,589 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:14:57,590 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:14:57,591 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:14:57,592 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:14:57,593 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:14:57,593 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:14:57,593 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:14:57,594 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:14:57,595 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:14:57,596 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 14:14:57,625 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:14:57,626 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:14:57,627 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:14:57,627 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:14:57,628 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:14:57,628 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:14:57,628 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:14:57,628 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:14:57,629 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:14:57,629 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:14:57,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:14:57,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:14:57,629 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:14:57,630 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:14:57,630 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:14:57,630 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:14:57,630 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:14:57,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:14:57,631 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:14:57,631 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:14:57,631 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:14:57,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:14:57,632 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:14:57,632 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:14:57,632 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:14:57,632 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:14:57,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:14:57,633 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:14:57,633 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:14:57,633 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:14:58,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:14:58,105 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:14:58,109 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:14:58,111 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:14:58,112 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:14:58,113 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-2.i [2020-10-27 14:14:58,201 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f2bc30cd4/a0c21afd9a494228bd4401de4d54f1e1/FLAGfc0abaf0a [2020-10-27 14:14:58,918 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:14:58,919 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-2.i [2020-10-27 14:14:58,928 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f2bc30cd4/a0c21afd9a494228bd4401de4d54f1e1/FLAGfc0abaf0a [2020-10-27 14:14:59,251 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f2bc30cd4/a0c21afd9a494228bd4401de4d54f1e1 [2020-10-27 14:14:59,258 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:14:59,266 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:14:59,270 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:14:59,270 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:14:59,275 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:14:59,276 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:14:59" (1/1) ... [2020-10-27 14:14:59,281 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1576404b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:59, skipping insertion in model container [2020-10-27 14:14:59,282 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:14:59" (1/1) ... [2020-10-27 14:14:59,290 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:14:59,311 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:14:59,646 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:14:59,665 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:14:59,733 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:14:59,757 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:14:59,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:59 WrapperNode [2020-10-27 14:14:59,758 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:14:59,760 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:14:59,760 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:14:59,760 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:14:59,778 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:59" (1/1) ... [2020-10-27 14:14:59,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:59" (1/1) ... [2020-10-27 14:14:59,805 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:59" (1/1) ... [2020-10-27 14:14:59,805 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:59" (1/1) ... [2020-10-27 14:14:59,829 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:59" (1/1) ... [2020-10-27 14:14:59,845 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:59" (1/1) ... [2020-10-27 14:14:59,848 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:59" (1/1) ... [2020-10-27 14:14:59,855 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:14:59,858 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:14:59,858 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:14:59,858 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:14:59,860 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:59" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:14:59,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:14:59,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:14:59,951 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:14:59,952 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:14:59,952 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:14:59,952 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:14:59,953 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:14:59,953 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 14:14:59,953 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 14:14:59,953 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:14:59,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:14:59,954 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:14:59,955 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:14:59,955 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:14:59,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:14:59,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:14:59,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:14:59,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:14:59,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:14:59,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:15:00,554 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:15:00,555 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-27 14:15:00,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:15:00 BoogieIcfgContainer [2020-10-27 14:15:00,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:15:00,558 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:15:00,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:15:00,562 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:15:00,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:14:59" (1/3) ... [2020-10-27 14:15:00,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63dca281 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:15:00, skipping insertion in model container [2020-10-27 14:15:00,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:59" (2/3) ... [2020-10-27 14:15:00,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63dca281 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:15:00, skipping insertion in model container [2020-10-27 14:15:00,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:15:00" (3/3) ... [2020-10-27 14:15:00,566 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_ground-2.i [2020-10-27 14:15:00,579 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:15:00,584 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:15:00,599 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:15:00,627 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:15:00,627 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:15:00,627 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:15:00,628 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:15:00,628 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:15:00,628 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:15:00,628 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:15:00,628 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:15:00,647 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-10-27 14:15:00,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 14:15:00,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:00,655 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:00,656 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:00,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:00,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1006986874, now seen corresponding path program 1 times [2020-10-27 14:15:00,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:00,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336744696] [2020-10-27 14:15:00,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:00,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:00,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:00,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:01,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:01,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 14:15:01,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:15:01,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 216 [2020-10-27 14:15:01,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:01,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:01,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:01,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:01,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 14:15:01,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:01,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:01,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:01,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:01,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:01,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:01,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 14:15:01,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:01,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:01,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:01,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:01,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:01,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:01,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336744696] [2020-10-27 14:15:01,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:15:01,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:15:01,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419647886] [2020-10-27 14:15:01,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:15:01,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:01,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:15:01,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:15:01,203 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 3 states. [2020-10-27 14:15:01,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:01,376 INFO L93 Difference]: Finished difference Result 89 states and 133 transitions. [2020-10-27 14:15:01,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:15:01,378 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-27 14:15:01,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:01,388 INFO L225 Difference]: With dead ends: 89 [2020-10-27 14:15:01,388 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 14:15:01,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:15:01,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 14:15:01,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-27 14:15:01,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 14:15:01,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2020-10-27 14:15:01,445 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 18 [2020-10-27 14:15:01,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:01,446 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2020-10-27 14:15:01,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:15:01,446 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2020-10-27 14:15:01,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 14:15:01,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:01,449 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:01,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:15:01,450 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:01,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:01,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1889588042, now seen corresponding path program 1 times [2020-10-27 14:15:01,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:01,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420697187] [2020-10-27 14:15:01,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:01,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:01,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:01,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:01,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:01,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 14:15:01,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:15:01,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-10-27 14:15:01,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:01,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:15:01,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:15:01,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 14:15:01,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:01,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:01,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:01,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:01,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:01,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:01,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:01,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:15:01,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:01,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:01,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:01,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:01,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:15:01,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:01,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420697187] [2020-10-27 14:15:01,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:15:01,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:15:01,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943991174] [2020-10-27 14:15:01,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:15:01,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:01,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:15:01,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:15:01,777 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 4 states. [2020-10-27 14:15:01,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:01,968 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2020-10-27 14:15:01,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:15:01,968 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-27 14:15:01,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:01,971 INFO L225 Difference]: With dead ends: 75 [2020-10-27 14:15:01,971 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 14:15:01,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:15:01,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 14:15:01,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 43. [2020-10-27 14:15:01,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 14:15:01,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2020-10-27 14:15:01,986 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 18 [2020-10-27 14:15:01,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:01,987 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2020-10-27 14:15:01,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:15:01,987 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2020-10-27 14:15:01,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 14:15:01,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:01,988 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:01,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:15:01,989 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:01,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:01,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1078257741, now seen corresponding path program 1 times [2020-10-27 14:15:01,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:01,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852750178] [2020-10-27 14:15:01,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:02,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:02,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:02,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:02,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:02,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:02,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:02,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 14:15:02,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:15:02,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 562 [2020-10-27 14:15:02,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:02,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:15:02,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:02,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 14:15:02,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:02,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:02,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:02,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:02,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:02,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:02,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:02,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:15:02,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:02,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:02,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:02,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:02,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:02,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:02,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852750178] [2020-10-27 14:15:02,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:15:02,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:15:02,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875952939] [2020-10-27 14:15:02,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:15:02,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:02,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:15:02,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:15:02,639 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand 4 states. [2020-10-27 14:15:02,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:02,824 INFO L93 Difference]: Finished difference Result 93 states and 122 transitions. [2020-10-27 14:15:02,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:15:02,825 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-27 14:15:02,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:02,827 INFO L225 Difference]: With dead ends: 93 [2020-10-27 14:15:02,827 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 14:15:02,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:15:02,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 14:15:02,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 47. [2020-10-27 14:15:02,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 14:15:02,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2020-10-27 14:15:02,839 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 20 [2020-10-27 14:15:02,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:02,840 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2020-10-27 14:15:02,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:15:02,840 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2020-10-27 14:15:02,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 14:15:02,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:02,841 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:02,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:15:02,842 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:02,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:02,842 INFO L82 PathProgramCache]: Analyzing trace with hash 685230731, now seen corresponding path program 1 times [2020-10-27 14:15:02,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:02,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977011770] [2020-10-27 14:15:02,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:02,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:02,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:02,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:02,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:03,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:03,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 14:15:03,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:15:03,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 296 [2020-10-27 14:15:03,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:03,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:15:03,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:15:03,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 14:15:03,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:03,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:03,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:03,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:03,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:03,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:03,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:03,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:15:03,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:03,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:03,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:03,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:03,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:03,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:03,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977011770] [2020-10-27 14:15:03,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:15:03,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 14:15:03,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808711029] [2020-10-27 14:15:03,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:15:03,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:03,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:15:03,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:15:03,235 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand 5 states. [2020-10-27 14:15:03,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:03,451 INFO L93 Difference]: Finished difference Result 109 states and 146 transitions. [2020-10-27 14:15:03,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:15:03,452 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-27 14:15:03,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:03,453 INFO L225 Difference]: With dead ends: 109 [2020-10-27 14:15:03,453 INFO L226 Difference]: Without dead ends: 72 [2020-10-27 14:15:03,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:15:03,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-27 14:15:03,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 48. [2020-10-27 14:15:03,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 14:15:03,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2020-10-27 14:15:03,463 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 20 [2020-10-27 14:15:03,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:03,464 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2020-10-27 14:15:03,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:15:03,464 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2020-10-27 14:15:03,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 14:15:03,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:03,465 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:03,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:15:03,477 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:03,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:03,478 INFO L82 PathProgramCache]: Analyzing trace with hash 240441052, now seen corresponding path program 1 times [2020-10-27 14:15:03,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:03,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392565583] [2020-10-27 14:15:03,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:03,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:03,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:03,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:03,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:03,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:03,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 14:15:03,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:15:03,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 490 [2020-10-27 14:15:03,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:03,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:15:03,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:15:03,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 14:15:03,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:15:04,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:04,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:04,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:04,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:04,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:04,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:04,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:15:04,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:04,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:04,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:04,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:04,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:04,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:15:04,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392565583] [2020-10-27 14:15:04,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:15:04,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 14:15:04,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050291443] [2020-10-27 14:15:04,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:15:04,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:04,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:15:04,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:15:04,087 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand 5 states. [2020-10-27 14:15:04,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:04,329 INFO L93 Difference]: Finished difference Result 101 states and 134 transitions. [2020-10-27 14:15:04,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:15:04,330 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-27 14:15:04,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:04,331 INFO L225 Difference]: With dead ends: 101 [2020-10-27 14:15:04,331 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 14:15:04,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:15:04,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 14:15:04,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2020-10-27 14:15:04,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 14:15:04,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2020-10-27 14:15:04,341 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 23 [2020-10-27 14:15:04,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:04,342 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2020-10-27 14:15:04,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:15:04,342 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2020-10-27 14:15:04,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 14:15:04,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:04,343 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:04,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:15:04,344 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:04,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:04,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1944014782, now seen corresponding path program 1 times [2020-10-27 14:15:04,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:04,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649092286] [2020-10-27 14:15:04,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:04,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:04,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:04,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:04,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:04,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:05,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:05,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 14:15:05,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:15:05,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 975 [2020-10-27 14:15:05,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:05,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:15:05,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 14:15:05,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:15:05,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:05,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:05,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:05,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:05,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:05,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:05,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:05,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:15:05,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:05,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:05,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:05,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:05,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:15:05,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:15:05,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649092286] [2020-10-27 14:15:05,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:15:05,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 14:15:05,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516152384] [2020-10-27 14:15:05,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:15:05,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:05,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:15:05,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:15:05,425 INFO L87 Difference]: Start difference. First operand 58 states and 76 transitions. Second operand 7 states. [2020-10-27 14:15:05,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:05,669 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2020-10-27 14:15:05,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 14:15:05,669 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-27 14:15:05,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:05,670 INFO L225 Difference]: With dead ends: 71 [2020-10-27 14:15:05,670 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 14:15:05,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:15:05,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 14:15:05,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2020-10-27 14:15:05,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 14:15:05,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2020-10-27 14:15:05,680 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 24 [2020-10-27 14:15:05,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:05,681 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2020-10-27 14:15:05,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:15:05,681 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2020-10-27 14:15:05,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 14:15:05,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:05,682 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] [2020-10-27 14:15:05,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:15:05,683 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:05,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:05,683 INFO L82 PathProgramCache]: Analyzing trace with hash -2094105468, now seen corresponding path program 1 times [2020-10-27 14:15:05,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:05,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035029824] [2020-10-27 14:15:05,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:05,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:05,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:05,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:05,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:05,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:05,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:05,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:05,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:05,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:06,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:06,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:10,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:10,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 14:15:10,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 14:15:10,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4450 [2020-10-27 14:15:10,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:10,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:15:10,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:15:10,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 14:15:10,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:15:10,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:10,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:10,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:10,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:10,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:10,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:10,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:15:10,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:10,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:10,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:10,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:10,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:10,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:15:10,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035029824] [2020-10-27 14:15:10,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:15:10,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 14:15:10,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070938742] [2020-10-27 14:15:10,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:15:10,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:10,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:15:10,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:15:10,213 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand 5 states. [2020-10-27 14:15:10,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:10,393 INFO L93 Difference]: Finished difference Result 129 states and 170 transitions. [2020-10-27 14:15:10,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:15:10,394 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-10-27 14:15:10,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:10,397 INFO L225 Difference]: With dead ends: 129 [2020-10-27 14:15:10,397 INFO L226 Difference]: Without dead ends: 86 [2020-10-27 14:15:10,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:15:10,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-27 14:15:10,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 67. [2020-10-27 14:15:10,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 14:15:10,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2020-10-27 14:15:10,407 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 29 [2020-10-27 14:15:10,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:10,407 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2020-10-27 14:15:10,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:15:10,408 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2020-10-27 14:15:10,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 14:15:10,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:10,409 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:10,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:15:10,409 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:10,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:10,410 INFO L82 PathProgramCache]: Analyzing trace with hash 2112688248, now seen corresponding path program 1 times [2020-10-27 14:15:10,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:10,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615932760] [2020-10-27 14:15:10,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:10,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:10,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:10,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:10,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:11,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:11,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 14:15:11,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:15:11,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1560 [2020-10-27 14:15:11,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:11,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:15:11,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:11,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 14:15:11,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:12,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:12,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:12,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:12,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:12,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:12,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:12,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:15:12,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:12,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:12,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:12,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:12,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:12,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-27 14:15:12,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:12,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:12,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:12,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:15:12,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:12,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:15:12,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:12,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:15:12,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:12,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:15:12,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:12,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:12,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615932760] [2020-10-27 14:15:12,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:12,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:15:12,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761037139] [2020-10-27 14:15:12,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:15:12,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:12,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:15:12,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:15:12,213 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand 12 states. [2020-10-27 14:15:12,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:12,899 INFO L93 Difference]: Finished difference Result 159 states and 212 transitions. [2020-10-27 14:15:12,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:15:12,900 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-27 14:15:12,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:12,902 INFO L225 Difference]: With dead ends: 159 [2020-10-27 14:15:12,902 INFO L226 Difference]: Without dead ends: 155 [2020-10-27 14:15:12,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:15:12,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-27 14:15:12,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 99. [2020-10-27 14:15:12,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-27 14:15:12,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 133 transitions. [2020-10-27 14:15:12,919 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 133 transitions. Word has length 32 [2020-10-27 14:15:12,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:12,920 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 133 transitions. [2020-10-27 14:15:12,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:15:12,920 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 133 transitions. [2020-10-27 14:15:12,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 14:15:12,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:12,921 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:12,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:15:12,922 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:12,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:12,922 INFO L82 PathProgramCache]: Analyzing trace with hash 423744506, now seen corresponding path program 1 times [2020-10-27 14:15:12,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:12,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963359720] [2020-10-27 14:15:12,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:12,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:12,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:12,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:12,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:12,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:13,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:13,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:13,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:14,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:14,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 14:15:14,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:15:14,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1530 [2020-10-27 14:15:14,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:14,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:15:14,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 14:15:14,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:15:14,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:14,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:14,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:14,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:14,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:14,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:14,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:14,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:15:14,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:14,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:14,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:14,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:14,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:14,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-27 14:15:14,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:14,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:14,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:14,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:15:14,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:14,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:15:14,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:14,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:15:14,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:14,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:15:14,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:15:14,603 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:14,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [963359720] [2020-10-27 14:15:14,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:15:14,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 14:15:14,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691490835] [2020-10-27 14:15:14,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:15:14,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:14,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:15:14,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:15:14,613 INFO L87 Difference]: Start difference. First operand 99 states and 133 transitions. Second operand 9 states. [2020-10-27 14:15:15,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:15,195 INFO L93 Difference]: Finished difference Result 358 states and 501 transitions. [2020-10-27 14:15:15,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:15:15,196 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-10-27 14:15:15,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:15,198 INFO L225 Difference]: With dead ends: 358 [2020-10-27 14:15:15,199 INFO L226 Difference]: Without dead ends: 287 [2020-10-27 14:15:15,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:15:15,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-10-27 14:15:15,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 158. [2020-10-27 14:15:15,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-27 14:15:15,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 223 transitions. [2020-10-27 14:15:15,222 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 223 transitions. Word has length 32 [2020-10-27 14:15:15,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:15,223 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 223 transitions. [2020-10-27 14:15:15,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:15:15,223 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 223 transitions. [2020-10-27 14:15:15,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 14:15:15,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:15,225 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:15,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:15:15,225 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:15,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:15,226 INFO L82 PathProgramCache]: Analyzing trace with hash 642599224, now seen corresponding path program 1 times [2020-10-27 14:15:15,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:15,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332921990] [2020-10-27 14:15:15,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:15,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:15,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:15,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:15,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:15,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:16,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:16,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 14:15:16,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:15:16,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1275 [2020-10-27 14:15:16,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:16,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:15:16,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:16,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 14:15:16,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:16,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:16,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:16,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:16,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:16,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:16,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:16,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:15:16,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:16,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:16,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:16,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:16,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:16,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-27 14:15:16,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:16,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:16,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:16,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:15:16,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:16,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:15:16,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:16,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:16,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:15:16,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:16,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:16,580 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:15:16,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332921990] [2020-10-27 14:15:16,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:16,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:15:16,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922952444] [2020-10-27 14:15:16,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:15:16,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:16,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:15:16,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:15:16,582 INFO L87 Difference]: Start difference. First operand 158 states and 223 transitions. Second operand 7 states. [2020-10-27 14:15:16,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:16,998 INFO L93 Difference]: Finished difference Result 460 states and 659 transitions. [2020-10-27 14:15:16,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:15:16,999 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-10-27 14:15:16,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:17,002 INFO L225 Difference]: With dead ends: 460 [2020-10-27 14:15:17,002 INFO L226 Difference]: Without dead ends: 330 [2020-10-27 14:15:17,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:15:17,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-10-27 14:15:17,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 255. [2020-10-27 14:15:17,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-10-27 14:15:17,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 368 transitions. [2020-10-27 14:15:17,035 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 368 transitions. Word has length 32 [2020-10-27 14:15:17,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:17,035 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 368 transitions. [2020-10-27 14:15:17,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:15:17,036 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 368 transitions. [2020-10-27 14:15:17,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 14:15:17,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:17,037 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] [2020-10-27 14:15:17,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:15:17,037 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:17,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:17,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1195859833, now seen corresponding path program 2 times [2020-10-27 14:15:17,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:17,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816247048] [2020-10-27 14:15:17,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:17,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:17,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:17,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:17,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:17,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:19,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:19,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 14:15:19,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:15:19,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2236 [2020-10-27 14:15:19,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:19,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:15:19,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:19,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 14:15:19,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:19,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:19,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:19,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:19,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:19,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:19,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:19,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:15:19,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:19,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:19,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:19,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:19,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:19,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-27 14:15:19,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:19,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:19,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:19,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:15:19,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:19,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:15:19,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:19,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:19,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:15:19,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:19,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:19,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:15:19,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816247048] [2020-10-27 14:15:19,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:19,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:15:19,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919495543] [2020-10-27 14:15:19,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:15:19,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:19,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:15:19,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:15:19,386 INFO L87 Difference]: Start difference. First operand 255 states and 368 transitions. Second operand 8 states. [2020-10-27 14:15:19,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:19,976 INFO L93 Difference]: Finished difference Result 801 states and 1164 transitions. [2020-10-27 14:15:19,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:15:19,978 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-27 14:15:19,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:19,984 INFO L225 Difference]: With dead ends: 801 [2020-10-27 14:15:19,984 INFO L226 Difference]: Without dead ends: 574 [2020-10-27 14:15:19,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:15:19,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2020-10-27 14:15:20,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 279. [2020-10-27 14:15:20,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-10-27 14:15:20,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 404 transitions. [2020-10-27 14:15:20,027 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 404 transitions. Word has length 35 [2020-10-27 14:15:20,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:20,028 INFO L481 AbstractCegarLoop]: Abstraction has 279 states and 404 transitions. [2020-10-27 14:15:20,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:15:20,028 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 404 transitions. [2020-10-27 14:15:20,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 14:15:20,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:20,031 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-10-27 14:15:20,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:15:20,032 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:20,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:20,033 INFO L82 PathProgramCache]: Analyzing trace with hash -947265000, now seen corresponding path program 3 times [2020-10-27 14:15:20,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:20,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077333884] [2020-10-27 14:15:20,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:20,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:20,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:20,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:20,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:20,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:23,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:23,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 14:15:23,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:15:23,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3533 [2020-10-27 14:15:23,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:23,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:15:23,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:23,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:15:23,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:23,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:23,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:23,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:23,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:23,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:23,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:23,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:15:23,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:23,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:23,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:23,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:23,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:23,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-27 14:15:23,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:23,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:23,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:23,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:15:23,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:23,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:15:23,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:23,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:23,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:15:23,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:23,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:23,664 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:15:23,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077333884] [2020-10-27 14:15:23,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:23,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:15:23,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226594352] [2020-10-27 14:15:23,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:15:23,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:23,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:15:23,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:15:23,667 INFO L87 Difference]: Start difference. First operand 279 states and 404 transitions. Second operand 9 states. [2020-10-27 14:15:24,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:24,394 INFO L93 Difference]: Finished difference Result 977 states and 1428 transitions. [2020-10-27 14:15:24,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:15:24,395 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-10-27 14:15:24,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:24,405 INFO L225 Difference]: With dead ends: 977 [2020-10-27 14:15:24,405 INFO L226 Difference]: Without dead ends: 733 [2020-10-27 14:15:24,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:15:24,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2020-10-27 14:15:24,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 308. [2020-10-27 14:15:24,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-10-27 14:15:24,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 449 transitions. [2020-10-27 14:15:24,465 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 449 transitions. Word has length 38 [2020-10-27 14:15:24,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:24,466 INFO L481 AbstractCegarLoop]: Abstraction has 308 states and 449 transitions. [2020-10-27 14:15:24,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:15:24,467 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 449 transitions. [2020-10-27 14:15:24,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 14:15:24,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:24,468 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2020-10-27 14:15:24,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:15:24,468 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:24,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:24,469 INFO L82 PathProgramCache]: Analyzing trace with hash 417786599, now seen corresponding path program 4 times [2020-10-27 14:15:24,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:24,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086901359] [2020-10-27 14:15:24,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:24,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:24,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:24,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:24,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:24,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:28,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:28,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 14:15:28,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:15:28,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4073 [2020-10-27 14:15:28,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:28,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:15:28,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:28,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 14:15:28,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:28,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:28,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:28,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:28,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:28,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:28,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:28,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:15:28,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:28,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:28,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:28,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:28,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:28,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-27 14:15:28,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:28,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:28,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:28,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:15:28,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:28,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:15:28,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:28,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:15:28,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:28,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:15:28,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:28,901 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:28,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086901359] [2020-10-27 14:15:28,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:28,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:15:28,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132257703] [2020-10-27 14:15:28,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:15:28,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:28,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:15:28,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:15:28,905 INFO L87 Difference]: Start difference. First operand 308 states and 449 transitions. Second operand 17 states. [2020-10-27 14:15:31,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:31,192 INFO L93 Difference]: Finished difference Result 1033 states and 1496 transitions. [2020-10-27 14:15:31,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:15:31,193 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-10-27 14:15:31,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:31,199 INFO L225 Difference]: With dead ends: 1033 [2020-10-27 14:15:31,199 INFO L226 Difference]: Without dead ends: 777 [2020-10-27 14:15:31,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:15:31,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2020-10-27 14:15:31,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 410. [2020-10-27 14:15:31,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 410 states. [2020-10-27 14:15:31,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 597 transitions. [2020-10-27 14:15:31,258 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 597 transitions. Word has length 41 [2020-10-27 14:15:31,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:31,259 INFO L481 AbstractCegarLoop]: Abstraction has 410 states and 597 transitions. [2020-10-27 14:15:31,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:15:31,259 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 597 transitions. [2020-10-27 14:15:31,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 14:15:31,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:31,260 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 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 14:15:31,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:15:31,261 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:31,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:31,261 INFO L82 PathProgramCache]: Analyzing trace with hash 636641317, now seen corresponding path program 1 times [2020-10-27 14:15:31,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:31,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801894126] [2020-10-27 14:15:31,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:31,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:31,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:31,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:31,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:31,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:34,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:34,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 14:15:34,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:15:34,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3382 [2020-10-27 14:15:34,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:34,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:15:34,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:34,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 14:15:34,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:34,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:34,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:34,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:34,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:34,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:34,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:34,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:15:34,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:34,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:34,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:34,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:34,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:34,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-27 14:15:34,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:34,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:34,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:34,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:15:34,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:34,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:15:34,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:34,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:34,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:15:34,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:34,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:34,750 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:15:34,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801894126] [2020-10-27 14:15:34,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:34,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:15:34,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372949776] [2020-10-27 14:15:34,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:15:34,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:34,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:15:34,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:15:34,753 INFO L87 Difference]: Start difference. First operand 410 states and 597 transitions. Second operand 10 states. [2020-10-27 14:15:35,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:35,631 INFO L93 Difference]: Finished difference Result 1449 states and 2124 transitions. [2020-10-27 14:15:35,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:15:35,632 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-10-27 14:15:35,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:35,640 INFO L225 Difference]: With dead ends: 1449 [2020-10-27 14:15:35,641 INFO L226 Difference]: Without dead ends: 1106 [2020-10-27 14:15:35,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:15:35,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2020-10-27 14:15:35,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 459. [2020-10-27 14:15:35,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 459 states. [2020-10-27 14:15:35,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 671 transitions. [2020-10-27 14:15:35,723 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 671 transitions. Word has length 41 [2020-10-27 14:15:35,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:35,723 INFO L481 AbstractCegarLoop]: Abstraction has 459 states and 671 transitions. [2020-10-27 14:15:35,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:15:35,724 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 671 transitions. [2020-10-27 14:15:35,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 14:15:35,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:35,725 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 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] [2020-10-27 14:15:35,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:15:35,725 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:35,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:35,726 INFO L82 PathProgramCache]: Analyzing trace with hash -2015950088, now seen corresponding path program 2 times [2020-10-27 14:15:35,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:35,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400852013] [2020-10-27 14:15:35,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:35,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:35,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:35,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:35,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:35,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:39,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:39,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 14:15:39,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:15:39,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4003 [2020-10-27 14:15:39,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:39,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:15:39,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:39,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 14:15:39,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:39,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:39,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:39,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:39,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:39,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:39,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:39,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:15:39,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:39,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:39,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:39,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:39,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:39,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-27 14:15:39,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:39,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:39,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:39,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:15:39,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:39,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:15:39,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:39,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:15:39,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:39,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:15:39,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:40,011 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 14:15:40,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400852013] [2020-10-27 14:15:40,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:40,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:15:40,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670610976] [2020-10-27 14:15:40,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:15:40,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:40,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:15:40,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:15:40,014 INFO L87 Difference]: Start difference. First operand 459 states and 671 transitions. Second operand 15 states. [2020-10-27 14:15:41,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:41,747 INFO L93 Difference]: Finished difference Result 828 states and 1185 transitions. [2020-10-27 14:15:41,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:15:41,747 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-10-27 14:15:41,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:41,753 INFO L225 Difference]: With dead ends: 828 [2020-10-27 14:15:41,753 INFO L226 Difference]: Without dead ends: 824 [2020-10-27 14:15:41,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:15:41,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2020-10-27 14:15:41,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 440. [2020-10-27 14:15:41,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 440 states. [2020-10-27 14:15:41,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 642 transitions. [2020-10-27 14:15:41,823 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 642 transitions. Word has length 44 [2020-10-27 14:15:41,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:41,823 INFO L481 AbstractCegarLoop]: Abstraction has 440 states and 642 transitions. [2020-10-27 14:15:41,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:15:41,824 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 642 transitions. [2020-10-27 14:15:41,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 14:15:41,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:41,825 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 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] [2020-10-27 14:15:41,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:15:41,825 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:41,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:41,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1769544118, now seen corresponding path program 3 times [2020-10-27 14:15:41,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:41,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478880568] [2020-10-27 14:15:41,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:41,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:41,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:41,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:41,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:42,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:45,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:45,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 14:15:45,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:15:45,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3286 [2020-10-27 14:15:45,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:45,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:15:45,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:45,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:15:45,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:45,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:45,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:45,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:45,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:45,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:45,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:45,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:15:45,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:45,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:45,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:45,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:45,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:45,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-27 14:15:45,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:45,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:45,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:45,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:15:45,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:45,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:15:45,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:45,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:45,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:15:45,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:45,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:45,235 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:15:45,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478880568] [2020-10-27 14:15:45,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:45,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:15:45,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502104592] [2020-10-27 14:15:45,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:15:45,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:45,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:15:45,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:15:45,238 INFO L87 Difference]: Start difference. First operand 440 states and 642 transitions. Second operand 11 states. [2020-10-27 14:15:46,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:46,236 INFO L93 Difference]: Finished difference Result 1685 states and 2480 transitions. [2020-10-27 14:15:46,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:15:46,236 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-10-27 14:15:46,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:46,244 INFO L225 Difference]: With dead ends: 1685 [2020-10-27 14:15:46,245 INFO L226 Difference]: Without dead ends: 1321 [2020-10-27 14:15:46,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:15:46,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2020-10-27 14:15:46,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 485. [2020-10-27 14:15:46,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 485 states. [2020-10-27 14:15:46,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 711 transitions. [2020-10-27 14:15:46,312 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 711 transitions. Word has length 44 [2020-10-27 14:15:46,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:46,312 INFO L481 AbstractCegarLoop]: Abstraction has 485 states and 711 transitions. [2020-10-27 14:15:46,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:15:46,312 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 711 transitions. [2020-10-27 14:15:46,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 14:15:46,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:46,314 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 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] [2020-10-27 14:15:46,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:15:46,314 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:46,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:46,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1561617465, now seen corresponding path program 4 times [2020-10-27 14:15:46,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:46,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862759719] [2020-10-27 14:15:46,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:46,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:46,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:46,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:46,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:46,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:49,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:49,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 14:15:49,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:15:49,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3486 [2020-10-27 14:15:49,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:49,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:15:49,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:49,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 14:15:49,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:50,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:50,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:50,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:50,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:50,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:50,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:50,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:15:50,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:50,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:50,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:50,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:50,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:50,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-27 14:15:50,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:50,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:50,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:50,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:15:50,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:50,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:15:50,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:50,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:15:50,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:50,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:15:50,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:50,039 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-27 14:15:50,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862759719] [2020-10-27 14:15:50,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:50,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:15:50,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158685616] [2020-10-27 14:15:50,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:15:50,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:50,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:15:50,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:15:50,041 INFO L87 Difference]: Start difference. First operand 485 states and 711 transitions. Second operand 13 states. [2020-10-27 14:15:51,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:51,259 INFO L93 Difference]: Finished difference Result 734 states and 1051 transitions. [2020-10-27 14:15:51,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:15:51,260 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2020-10-27 14:15:51,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:51,264 INFO L225 Difference]: With dead ends: 734 [2020-10-27 14:15:51,265 INFO L226 Difference]: Without dead ends: 730 [2020-10-27 14:15:51,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:15:51,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2020-10-27 14:15:51,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 450. [2020-10-27 14:15:51,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2020-10-27 14:15:51,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 658 transitions. [2020-10-27 14:15:51,324 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 658 transitions. Word has length 47 [2020-10-27 14:15:51,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:51,324 INFO L481 AbstractCegarLoop]: Abstraction has 450 states and 658 transitions. [2020-10-27 14:15:51,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:15:51,325 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 658 transitions. [2020-10-27 14:15:51,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 14:15:51,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:51,326 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 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 14:15:51,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:15:51,326 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:51,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:51,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1453616055, now seen corresponding path program 5 times [2020-10-27 14:15:51,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:51,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161066253] [2020-10-27 14:15:51,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:51,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:51,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:51,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:51,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:51,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:56,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:56,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 14:15:56,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:15:56,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4728 [2020-10-27 14:15:56,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:56,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:15:56,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:56,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 14:15:56,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:56,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:56,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:56,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:56,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:56,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:56,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:56,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:15:56,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:56,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:56,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:56,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:56,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:56,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-27 14:15:56,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:56,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:56,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:56,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:15:56,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:56,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:15:56,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:56,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:56,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:15:56,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:56,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:56,173 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:15:56,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161066253] [2020-10-27 14:15:56,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:56,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:15:56,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334203283] [2020-10-27 14:15:56,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:15:56,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:56,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:15:56,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:15:56,175 INFO L87 Difference]: Start difference. First operand 450 states and 658 transitions. Second operand 12 states. [2020-10-27 14:15:57,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:57,374 INFO L93 Difference]: Finished difference Result 1859 states and 2740 transitions. [2020-10-27 14:15:57,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:15:57,374 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-27 14:15:57,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:57,382 INFO L225 Difference]: With dead ends: 1859 [2020-10-27 14:15:57,383 INFO L226 Difference]: Without dead ends: 1487 [2020-10-27 14:15:57,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:15:57,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2020-10-27 14:15:57,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 487. [2020-10-27 14:15:57,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 487 states. [2020-10-27 14:15:57,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 715 transitions. [2020-10-27 14:15:57,452 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 715 transitions. Word has length 47 [2020-10-27 14:15:57,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:57,453 INFO L481 AbstractCegarLoop]: Abstraction has 487 states and 715 transitions. [2020-10-27 14:15:57,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:15:57,453 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 715 transitions. [2020-10-27 14:15:57,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 14:15:57,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:57,454 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 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 14:15:57,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:15:57,454 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:57,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:57,455 INFO L82 PathProgramCache]: Analyzing trace with hash -361349354, now seen corresponding path program 6 times [2020-10-27 14:15:57,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:57,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247222959] [2020-10-27 14:15:57,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:57,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:57,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:57,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:57,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:58,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:01,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:01,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 14:16:01,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:16:01,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3795 [2020-10-27 14:16:01,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:01,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:16:01,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:16:01,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:16:01,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:01,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:01,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:01,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:01,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:01,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:01,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:01,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:16:01,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:01,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:01,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:01,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:01,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:01,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-27 14:16:01,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:01,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:01,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:01,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:16:01,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:01,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:16:01,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:01,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:01,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:16:01,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:01,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:01,385 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:16:01,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247222959] [2020-10-27 14:16:01,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:01,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:16:01,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865322737] [2020-10-27 14:16:01,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:16:01,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:01,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:16:01,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:16:01,388 INFO L87 Difference]: Start difference. First operand 487 states and 715 transitions. Second operand 13 states. [2020-10-27 14:16:02,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:02,778 INFO L93 Difference]: Finished difference Result 2090 states and 3089 transitions. [2020-10-27 14:16:02,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:16:02,783 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2020-10-27 14:16:02,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:02,794 INFO L225 Difference]: With dead ends: 2090 [2020-10-27 14:16:02,796 INFO L226 Difference]: Without dead ends: 1693 [2020-10-27 14:16:02,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:16:02,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1693 states. [2020-10-27 14:16:02,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1693 to 524. [2020-10-27 14:16:02,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 524 states. [2020-10-27 14:16:02,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 772 transitions. [2020-10-27 14:16:02,878 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 772 transitions. Word has length 50 [2020-10-27 14:16:02,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:02,878 INFO L481 AbstractCegarLoop]: Abstraction has 524 states and 772 transitions. [2020-10-27 14:16:02,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:16:02,878 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 772 transitions. [2020-10-27 14:16:02,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 14:16:02,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:02,879 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 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 14:16:02,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:16:02,879 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:02,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:02,880 INFO L82 PathProgramCache]: Analyzing trace with hash 683705641, now seen corresponding path program 7 times [2020-10-27 14:16:02,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:02,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545897223] [2020-10-27 14:16:02,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:02,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:02,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:02,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:02,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:03,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:07,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:07,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 14:16:07,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:16:07,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:16:07,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:07,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:16:07,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:16:07,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 14:16:07,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:08,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:08,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:08,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:08,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:08,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:08,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:08,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:16:08,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:08,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:08,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:08,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:08,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:08,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-27 14:16:08,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:08,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:08,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:08,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:16:08,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:08,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:16:08,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:08,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:08,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:16:08,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:08,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:08,023 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 2 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:16:08,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545897223] [2020-10-27 14:16:08,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:08,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:16:08,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517640039] [2020-10-27 14:16:08,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:16:08,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:08,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:16:08,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:16:08,025 INFO L87 Difference]: Start difference. First operand 524 states and 772 transitions. Second operand 14 states. [2020-10-27 14:16:09,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:09,559 INFO L93 Difference]: Finished difference Result 2321 states and 3438 transitions. [2020-10-27 14:16:09,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:16:09,559 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2020-10-27 14:16:09,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:09,573 INFO L225 Difference]: With dead ends: 2321 [2020-10-27 14:16:09,573 INFO L226 Difference]: Without dead ends: 1899 [2020-10-27 14:16:09,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=344, Invalid=712, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:16:09,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2020-10-27 14:16:09,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 561. [2020-10-27 14:16:09,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 561 states. [2020-10-27 14:16:09,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 829 transitions. [2020-10-27 14:16:09,659 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 829 transitions. Word has length 53 [2020-10-27 14:16:09,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:09,659 INFO L481 AbstractCegarLoop]: Abstraction has 561 states and 829 transitions. [2020-10-27 14:16:09,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:16:09,659 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 829 transitions. [2020-10-27 14:16:09,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 14:16:09,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:09,664 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 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 14:16:09,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:16:09,664 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:09,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:09,665 INFO L82 PathProgramCache]: Analyzing trace with hash -300867018, now seen corresponding path program 8 times [2020-10-27 14:16:09,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:09,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273352574] [2020-10-27 14:16:09,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:09,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:09,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:09,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:09,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:10,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:14,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:14,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 14:16:14,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:16:14,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:16:14,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:14,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 14:16:14,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:16:14,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 14:16:14,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:15,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:15,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:15,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:15,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:15,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:15,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:15,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:16:15,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:15,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:15,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:15,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:15,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:15,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-27 14:16:15,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:15,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:15,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:15,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:16:15,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:15,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:16:15,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:15,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:16:15,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:15,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:16:15,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:15,489 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 88 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:16:15,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273352574] [2020-10-27 14:16:15,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:15,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 14:16:15,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910133872] [2020-10-27 14:16:15,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 14:16:15,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:15,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 14:16:15,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:16:15,491 INFO L87 Difference]: Start difference. First operand 561 states and 829 transitions. Second operand 28 states. [2020-10-27 14:16:18,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:18,071 INFO L93 Difference]: Finished difference Result 2324 states and 3418 transitions. [2020-10-27 14:16:18,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 14:16:18,072 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 56 [2020-10-27 14:16:18,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:18,085 INFO L225 Difference]: With dead ends: 2324 [2020-10-27 14:16:18,085 INFO L226 Difference]: Without dead ends: 2320 [2020-10-27 14:16:18,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=361, Invalid=1991, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 14:16:18,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2020-10-27 14:16:18,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 795. [2020-10-27 14:16:18,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 795 states. [2020-10-27 14:16:18,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1183 transitions. [2020-10-27 14:16:18,198 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1183 transitions. Word has length 56 [2020-10-27 14:16:18,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:18,199 INFO L481 AbstractCegarLoop]: Abstraction has 795 states and 1183 transitions. [2020-10-27 14:16:18,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 14:16:18,199 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1183 transitions. [2020-10-27 14:16:18,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 14:16:18,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:18,200 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 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] [2020-10-27 14:16:18,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:16:18,201 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:18,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:18,201 INFO L82 PathProgramCache]: Analyzing trace with hash -82012300, now seen corresponding path program 9 times [2020-10-27 14:16:18,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:18,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263227255] [2020-10-27 14:16:18,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:18,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:18,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:18,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:18,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:19,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:23,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:23,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 14:16:23,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:16:23,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:16:23,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:23,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:16:23,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:16:23,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:16:23,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:23,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:23,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:23,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:23,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:23,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:23,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:23,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:16:23,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:23,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:23,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:23,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:23,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:23,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-27 14:16:23,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:23,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:23,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:23,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:16:23,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:23,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:16:23,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:23,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:23,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:16:23,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:23,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:16:23,388 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 2 proven. 117 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:16:23,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263227255] [2020-10-27 14:16:23,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:23,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:16:23,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554811098] [2020-10-27 14:16:23,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:16:23,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:23,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:16:23,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:16:23,400 INFO L87 Difference]: Start difference. First operand 795 states and 1183 transitions. Second operand 15 states. [2020-10-27 14:16:25,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:25,485 INFO L93 Difference]: Finished difference Result 3233 states and 4843 transitions. [2020-10-27 14:16:25,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 14:16:25,488 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 56 [2020-10-27 14:16:25,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:25,498 INFO L225 Difference]: With dead ends: 3233 [2020-10-27 14:16:25,498 INFO L226 Difference]: Without dead ends: 2639 [2020-10-27 14:16:25,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=411, Invalid=849, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:16:25,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2639 states. [2020-10-27 14:16:25,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2639 to 880. [2020-10-27 14:16:25,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 880 states. [2020-10-27 14:16:25,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1312 transitions. [2020-10-27 14:16:25,618 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1312 transitions. Word has length 56 [2020-10-27 14:16:25,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:25,619 INFO L481 AbstractCegarLoop]: Abstraction has 880 states and 1312 transitions. [2020-10-27 14:16:25,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:16:25,619 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1312 transitions. [2020-10-27 14:16:25,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 14:16:25,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:25,620 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 3, 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] [2020-10-27 14:16:25,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:16:25,621 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:25,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:25,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1013883575, now seen corresponding path program 10 times [2020-10-27 14:16:25,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:25,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787886948] [2020-10-27 14:16:25,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:25,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:25,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:25,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:25,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:26,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:30,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:30,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 14:16:30,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:16:30,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:16:30,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:30,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 14:16:30,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:16:30,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 14:16:30,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:31,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:31,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:31,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:31,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:31,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:31,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:31,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:16:31,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:31,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:31,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:31,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:31,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:31,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-27 14:16:31,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:31,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:31,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:31,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:16:31,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:31,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:16:31,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:31,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:16:31,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:31,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:16:31,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:31,227 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 71 proven. 71 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 14:16:31,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787886948] [2020-10-27 14:16:31,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:31,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 14:16:31,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60356166] [2020-10-27 14:16:31,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 14:16:31,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:31,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 14:16:31,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:16:31,234 INFO L87 Difference]: Start difference. First operand 880 states and 1312 transitions. Second operand 26 states. [2020-10-27 14:16:33,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:33,728 INFO L93 Difference]: Finished difference Result 2321 states and 3418 transitions. [2020-10-27 14:16:33,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:16:33,729 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 59 [2020-10-27 14:16:33,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:33,739 INFO L225 Difference]: With dead ends: 2321 [2020-10-27 14:16:33,739 INFO L226 Difference]: Without dead ends: 2317 [2020-10-27 14:16:33,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=310, Invalid=1760, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 14:16:33,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2020-10-27 14:16:33,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 853. [2020-10-27 14:16:33,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 853 states. [2020-10-27 14:16:33,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 1271 transitions. [2020-10-27 14:16:33,887 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 1271 transitions. Word has length 59 [2020-10-27 14:16:33,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:33,888 INFO L481 AbstractCegarLoop]: Abstraction has 853 states and 1271 transitions. [2020-10-27 14:16:33,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 14:16:33,888 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 1271 transitions. [2020-10-27 14:16:33,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 14:16:33,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:33,889 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 4, 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] [2020-10-27 14:16:33,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:16:33,889 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:33,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:33,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1523356665, now seen corresponding path program 11 times [2020-10-27 14:16:33,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:33,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034076738] [2020-10-27 14:16:33,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:33,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:33,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:33,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:33,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:34,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:38,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:38,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 14:16:38,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:16:38,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:16:38,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:38,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:16:38,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:16:38,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 14:16:38,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:39,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:39,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:39,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:39,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:39,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:39,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:39,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:16:39,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:39,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:39,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:39,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:39,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:39,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-27 14:16:39,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:39,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:39,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:39,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:16:39,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:39,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:16:39,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:39,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:39,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:16:39,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:39,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:39,075 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 145 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:16:39,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034076738] [2020-10-27 14:16:39,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:39,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:16:39,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609086044] [2020-10-27 14:16:39,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:16:39,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:39,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:16:39,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:16:39,077 INFO L87 Difference]: Start difference. First operand 853 states and 1271 transitions. Second operand 16 states. [2020-10-27 14:16:41,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:41,348 INFO L93 Difference]: Finished difference Result 3523 states and 5286 transitions. [2020-10-27 14:16:41,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 14:16:41,349 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 59 [2020-10-27 14:16:41,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:41,363 INFO L225 Difference]: With dead ends: 3523 [2020-10-27 14:16:41,363 INFO L226 Difference]: Without dead ends: 2891 [2020-10-27 14:16:41,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=484, Invalid=998, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:16:41,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2891 states. [2020-10-27 14:16:41,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2891 to 930. [2020-10-27 14:16:41,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 930 states. [2020-10-27 14:16:41,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1388 transitions. [2020-10-27 14:16:41,507 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1388 transitions. Word has length 59 [2020-10-27 14:16:41,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:41,507 INFO L481 AbstractCegarLoop]: Abstraction has 930 states and 1388 transitions. [2020-10-27 14:16:41,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:16:41,507 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1388 transitions. [2020-10-27 14:16:41,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 14:16:41,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:41,509 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 5, 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] [2020-10-27 14:16:41,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:16:41,511 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:41,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:41,511 INFO L82 PathProgramCache]: Analyzing trace with hash 979164118, now seen corresponding path program 12 times [2020-10-27 14:16:41,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:41,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867156096] [2020-10-27 14:16:41,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:41,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:41,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:41,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:41,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:42,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:46,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:46,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 14:16:46,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:16:46,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:16:46,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:46,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:16:46,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:16:46,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 14:16:46,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:47,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:47,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:47,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:47,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:47,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:47,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:47,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:16:47,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:47,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:47,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:47,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:47,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:47,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-27 14:16:47,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:47,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:47,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:47,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:16:47,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:47,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:16:47,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:47,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:16:47,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:47,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:16:47,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:47,066 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 57 proven. 97 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-27 14:16:47,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867156096] [2020-10-27 14:16:47,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:47,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 14:16:47,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788557039] [2020-10-27 14:16:47,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 14:16:47,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:47,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 14:16:47,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:16:47,068 INFO L87 Difference]: Start difference. First operand 930 states and 1388 transitions. Second operand 24 states. [2020-10-27 14:16:49,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:49,501 INFO L93 Difference]: Finished difference Result 2270 states and 3347 transitions. [2020-10-27 14:16:49,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 14:16:49,501 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 62 [2020-10-27 14:16:49,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:49,514 INFO L225 Difference]: With dead ends: 2270 [2020-10-27 14:16:49,514 INFO L226 Difference]: Without dead ends: 2266 [2020-10-27 14:16:49,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=269, Invalid=1623, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 14:16:49,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2266 states. [2020-10-27 14:16:49,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2266 to 887. [2020-10-27 14:16:49,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 887 states. [2020-10-27 14:16:49,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1323 transitions. [2020-10-27 14:16:49,651 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1323 transitions. Word has length 62 [2020-10-27 14:16:49,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:49,652 INFO L481 AbstractCegarLoop]: Abstraction has 887 states and 1323 transitions. [2020-10-27 14:16:49,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 14:16:49,652 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1323 transitions. [2020-10-27 14:16:49,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 14:16:49,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:49,653 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 5, 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] [2020-10-27 14:16:49,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:16:49,654 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:49,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:49,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1264819180, now seen corresponding path program 13 times [2020-10-27 14:16:49,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:49,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289594169] [2020-10-27 14:16:49,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:49,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:49,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:49,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:49,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:50,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:54,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:54,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 14:16:54,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:16:54,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:16:54,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:54,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:16:54,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:16:54,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 14:16:54,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:54,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:54,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:54,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:54,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:54,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:54,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:54,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:16:54,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:54,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:54,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:54,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:54,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:54,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-27 14:16:54,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:54,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:54,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:54,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:16:54,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:54,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:16:54,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:54,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:54,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:16:54,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:54,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:54,864 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 2 proven. 176 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:16:54,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289594169] [2020-10-27 14:16:54,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:54,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:16:54,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641241642] [2020-10-27 14:16:54,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:16:54,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:54,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:16:54,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:16:54,866 INFO L87 Difference]: Start difference. First operand 887 states and 1323 transitions. Second operand 17 states. [2020-10-27 14:16:57,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:57,423 INFO L93 Difference]: Finished difference Result 3744 states and 5621 transitions. [2020-10-27 14:16:57,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 14:16:57,424 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 62 [2020-10-27 14:16:57,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:57,434 INFO L225 Difference]: With dead ends: 3744 [2020-10-27 14:16:57,435 INFO L226 Difference]: Without dead ends: 3089 [2020-10-27 14:16:57,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=1159, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 14:16:57,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3089 states. [2020-10-27 14:16:57,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3089 to 956. [2020-10-27 14:16:57,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 956 states. [2020-10-27 14:16:57,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 1428 transitions. [2020-10-27 14:16:57,606 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 1428 transitions. Word has length 62 [2020-10-27 14:16:57,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:57,607 INFO L481 AbstractCegarLoop]: Abstraction has 956 states and 1428 transitions. [2020-10-27 14:16:57,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:16:57,607 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 1428 transitions. [2020-10-27 14:16:57,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 14:16:57,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:57,608 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 7, 5, 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] [2020-10-27 14:16:57,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:16:57,608 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:57,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:57,609 INFO L82 PathProgramCache]: Analyzing trace with hash -2101949271, now seen corresponding path program 14 times [2020-10-27 14:16:57,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:57,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443187273] [2020-10-27 14:16:57,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:57,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:57,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:57,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:57,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:58,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:02,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:02,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 14:17:02,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:17:02,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:17:02,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:02,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:17:02,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:17:02,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 14:17:02,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:17:02,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:17:02,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:02,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:02,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:02,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:17:02,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:02,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:17:02,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:02,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:02,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:02,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:02,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:02,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-27 14:17:02,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:02,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:02,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:02,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:17:02,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:02,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:17:02,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:02,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:02,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:17:02,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:02,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:02,838 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 2 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:17:02,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443187273] [2020-10-27 14:17:02,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:17:02,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:17:02,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722826627] [2020-10-27 14:17:02,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:17:02,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:17:02,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:17:02,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:17:02,840 INFO L87 Difference]: Start difference. First operand 956 states and 1428 transitions. Second operand 18 states. [2020-10-27 14:17:05,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:17:05,660 INFO L93 Difference]: Finished difference Result 4067 states and 6114 transitions. [2020-10-27 14:17:05,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 14:17:05,661 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 65 [2020-10-27 14:17:05,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:17:05,672 INFO L225 Difference]: With dead ends: 4067 [2020-10-27 14:17:05,672 INFO L226 Difference]: Without dead ends: 3367 [2020-10-27 14:17:05,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=648, Invalid=1332, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 14:17:05,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3367 states. [2020-10-27 14:17:05,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3367 to 1025. [2020-10-27 14:17:05,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1025 states. [2020-10-27 14:17:05,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 1533 transitions. [2020-10-27 14:17:05,832 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 1533 transitions. Word has length 65 [2020-10-27 14:17:05,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:17:05,832 INFO L481 AbstractCegarLoop]: Abstraction has 1025 states and 1533 transitions. [2020-10-27 14:17:05,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:17:05,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 1533 transitions. [2020-10-27 14:17:05,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 14:17:05,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:17:05,834 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 8, 5, 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] [2020-10-27 14:17:05,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:17:05,834 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:17:05,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:17:05,835 INFO L82 PathProgramCache]: Analyzing trace with hash -169402380, now seen corresponding path program 15 times [2020-10-27 14:17:05,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:17:05,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552074448] [2020-10-27 14:17:05,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:17:05,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:05,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:05,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:05,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:06,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:10,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:10,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 14:17:10,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:17:10,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:17:10,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:10,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:17:10,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:17:10,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 14:17:10,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:11,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:17:11,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:11,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:11,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:11,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:17:11,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:11,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:17:11,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:11,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:11,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:11,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:11,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:11,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-27 14:17:11,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:11,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:11,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:11,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:17:11,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:11,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:17:11,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:11,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:11,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:17:11,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:11,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:11,089 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 2 proven. 247 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:17:11,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552074448] [2020-10-27 14:17:11,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:17:11,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:17:11,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268337773] [2020-10-27 14:17:11,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:17:11,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:17:11,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:17:11,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:17:11,091 INFO L87 Difference]: Start difference. First operand 1025 states and 1533 transitions. Second operand 19 states. [2020-10-27 14:17:14,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:17:14,260 INFO L93 Difference]: Finished difference Result 4390 states and 6607 transitions. [2020-10-27 14:17:14,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 14:17:14,261 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 68 [2020-10-27 14:17:14,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:17:14,279 INFO L225 Difference]: With dead ends: 4390 [2020-10-27 14:17:14,279 INFO L226 Difference]: Without dead ends: 3645 [2020-10-27 14:17:14,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=739, Invalid=1517, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 14:17:14,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3645 states. [2020-10-27 14:17:14,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3645 to 1094. [2020-10-27 14:17:14,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1094 states. [2020-10-27 14:17:14,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1638 transitions. [2020-10-27 14:17:14,478 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1638 transitions. Word has length 68 [2020-10-27 14:17:14,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:17:14,478 INFO L481 AbstractCegarLoop]: Abstraction has 1094 states and 1638 transitions. [2020-10-27 14:17:14,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:17:14,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1638 transitions. [2020-10-27 14:17:14,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 14:17:14,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:17:14,480 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 9, 5, 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] [2020-10-27 14:17:14,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:17:14,481 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:17:14,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:17:14,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1701575479, now seen corresponding path program 16 times [2020-10-27 14:17:14,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:17:14,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738491983] [2020-10-27 14:17:14,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:17:14,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:14,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:14,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:14,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:15,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:19,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:19,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 14:17:19,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:17:19,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:17:19,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:19,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:17:19,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:17:19,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 14:17:19,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:19,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:17:19,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:19,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:19,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:19,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:17:19,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:19,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:17:19,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:19,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:19,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:19,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:19,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:19,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-27 14:17:19,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:19,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:19,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:19,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:17:19,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:19,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:17:19,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:19,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:19,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:17:19,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:19,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:19,773 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 2 proven. 287 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:17:19,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738491983] [2020-10-27 14:17:19,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:17:19,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:17:19,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57356640] [2020-10-27 14:17:19,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:17:19,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:17:19,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:17:19,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:17:19,775 INFO L87 Difference]: Start difference. First operand 1094 states and 1638 transitions. Second operand 20 states. [2020-10-27 14:17:23,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:17:23,472 INFO L93 Difference]: Finished difference Result 4713 states and 7100 transitions. [2020-10-27 14:17:23,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-27 14:17:23,473 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 71 [2020-10-27 14:17:23,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:17:23,483 INFO L225 Difference]: With dead ends: 4713 [2020-10-27 14:17:23,483 INFO L226 Difference]: Without dead ends: 3923 [2020-10-27 14:17:23,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=836, Invalid=1714, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 14:17:23,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3923 states. [2020-10-27 14:17:23,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3923 to 1163. [2020-10-27 14:17:23,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1163 states. [2020-10-27 14:17:23,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 1743 transitions. [2020-10-27 14:17:23,693 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 1743 transitions. Word has length 71 [2020-10-27 14:17:23,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:17:23,693 INFO L481 AbstractCegarLoop]: Abstraction has 1163 states and 1743 transitions. [2020-10-27 14:17:23,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:17:23,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 1743 transitions. [2020-10-27 14:17:23,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-27 14:17:23,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:17:23,695 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 10, 5, 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] [2020-10-27 14:17:23,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:17:23,695 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:17:23,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:17:23,696 INFO L82 PathProgramCache]: Analyzing trace with hash 242054100, now seen corresponding path program 17 times [2020-10-27 14:17:23,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:17:23,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142440716] [2020-10-27 14:17:23,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:17:23,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:23,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:23,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:23,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:25,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:28,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:28,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 14:17:28,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:17:28,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:17:28,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:28,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:17:28,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:17:28,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 14:17:28,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:29,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:17:29,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:29,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:29,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:29,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:17:29,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:29,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:17:29,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:29,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:29,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:29,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:29,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:29,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-27 14:17:29,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:29,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:29,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:29,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:17:29,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:29,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:17:29,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:29,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:17:29,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:29,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:17:29,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:29,224 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 52 proven. 156 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-27 14:17:29,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142440716] [2020-10-27 14:17:29,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:17:29,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:17:29,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850196203] [2020-10-27 14:17:29,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:17:29,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:17:29,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:17:29,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:17:29,225 INFO L87 Difference]: Start difference. First operand 1163 states and 1743 transitions. Second operand 22 states. [2020-10-27 14:17:31,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:17:31,805 INFO L93 Difference]: Finished difference Result 2501 states and 3708 transitions. [2020-10-27 14:17:31,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:17:31,806 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 74 [2020-10-27 14:17:31,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:17:31,812 INFO L225 Difference]: With dead ends: 2501 [2020-10-27 14:17:31,813 INFO L226 Difference]: Without dead ends: 2497 [2020-10-27 14:17:31,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=223, Invalid=1337, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 14:17:31,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2020-10-27 14:17:32,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 1080. [2020-10-27 14:17:32,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1080 states. [2020-10-27 14:17:32,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1618 transitions. [2020-10-27 14:17:32,018 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1618 transitions. Word has length 74 [2020-10-27 14:17:32,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:17:32,018 INFO L481 AbstractCegarLoop]: Abstraction has 1080 states and 1618 transitions. [2020-10-27 14:17:32,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:17:32,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1618 transitions. [2020-10-27 14:17:32,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-27 14:17:32,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:17:32,020 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 11, 4, 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] [2020-10-27 14:17:32,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 14:17:32,021 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:17:32,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:17:32,021 INFO L82 PathProgramCache]: Analyzing trace with hash 226535382, now seen corresponding path program 18 times [2020-10-27 14:17:32,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:17:32,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479676274] [2020-10-27 14:17:32,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:17:32,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:32,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:32,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:32,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:33,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:37,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:37,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 14:17:37,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:17:37,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:17:37,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:37,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:17:37,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:17:37,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 14:17:37,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:37,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:17:37,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:37,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:37,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:37,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:17:37,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:37,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:17:37,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:37,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:37,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:37,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:37,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:37,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-27 14:17:37,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:37,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:37,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:37,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:17:37,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:37,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:17:37,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:37,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:37,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:17:37,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:37,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:37,344 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 2 proven. 330 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:17:37,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479676274] [2020-10-27 14:17:37,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:17:37,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:17:37,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459266558] [2020-10-27 14:17:37,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:17:37,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:17:37,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:17:37,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:17:37,346 INFO L87 Difference]: Start difference. First operand 1080 states and 1618 transitions. Second operand 21 states. [2020-10-27 14:17:41,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:17:41,273 INFO L93 Difference]: Finished difference Result 4796 states and 7219 transitions. [2020-10-27 14:17:41,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-27 14:17:41,275 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 74 [2020-10-27 14:17:41,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:17:41,286 INFO L225 Difference]: With dead ends: 4796 [2020-10-27 14:17:41,286 INFO L226 Difference]: Without dead ends: 4013 [2020-10-27 14:17:41,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=939, Invalid=1923, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 14:17:41,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4013 states. [2020-10-27 14:17:41,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4013 to 1141. [2020-10-27 14:17:41,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1141 states. [2020-10-27 14:17:41,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 1711 transitions. [2020-10-27 14:17:41,522 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 1711 transitions. Word has length 74 [2020-10-27 14:17:41,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:17:41,522 INFO L481 AbstractCegarLoop]: Abstraction has 1141 states and 1711 transitions. [2020-10-27 14:17:41,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:17:41,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 1711 transitions. [2020-10-27 14:17:41,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 14:17:41,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:17:41,524 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 12, 4, 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] [2020-10-27 14:17:41,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 14:17:41,524 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:17:41,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:17:41,525 INFO L82 PathProgramCache]: Analyzing trace with hash -299902553, now seen corresponding path program 19 times [2020-10-27 14:17:41,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:17:41,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255474670] [2020-10-27 14:17:41,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:17:41,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:41,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:41,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:41,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:43,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:46,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:46,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 14:17:46,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:17:46,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:17:46,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:46,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:17:46,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:17:46,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 14:17:46,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:46,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:17:46,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:46,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:46,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:46,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:17:46,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:46,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:17:46,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:46,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:46,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:46,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:46,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:46,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-27 14:17:46,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:46,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:46,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:46,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:17:46,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:46,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:17:46,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:46,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:46,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:17:46,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:46,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:46,856 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 2 proven. 376 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:17:46,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255474670] [2020-10-27 14:17:46,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:17:46,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:17:46,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853403140] [2020-10-27 14:17:46,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:17:46,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:17:46,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:17:46,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:17:46,858 INFO L87 Difference]: Start difference. First operand 1141 states and 1711 transitions. Second operand 22 states. [2020-10-27 14:17:50,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:17:50,994 INFO L93 Difference]: Finished difference Result 5096 states and 7676 transitions. [2020-10-27 14:17:50,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-27 14:17:50,995 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 77 [2020-10-27 14:17:50,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:17:51,015 INFO L225 Difference]: With dead ends: 5096 [2020-10-27 14:17:51,015 INFO L226 Difference]: Without dead ends: 4273 [2020-10-27 14:17:51,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1048, Invalid=2144, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 14:17:51,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4273 states. [2020-10-27 14:17:51,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4273 to 1202. [2020-10-27 14:17:51,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1202 states. [2020-10-27 14:17:51,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 1804 transitions. [2020-10-27 14:17:51,272 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 1804 transitions. Word has length 77 [2020-10-27 14:17:51,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:17:51,272 INFO L481 AbstractCegarLoop]: Abstraction has 1202 states and 1804 transitions. [2020-10-27 14:17:51,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:17:51,272 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 1804 transitions. [2020-10-27 14:17:51,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 14:17:51,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:17:51,274 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 13, 4, 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] [2020-10-27 14:17:51,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 14:17:51,274 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:17:51,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:17:51,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1808140854, now seen corresponding path program 20 times [2020-10-27 14:17:51,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:17:51,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469617446] [2020-10-27 14:17:51,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:17:51,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:51,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:51,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:51,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:53,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:56,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:56,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 14:17:56,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:17:56,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:17:56,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:56,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:17:56,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:17:56,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 14:17:56,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:56,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:17:56,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:56,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:56,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:56,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:17:56,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:56,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:17:56,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:56,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:56,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:56,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:56,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:56,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-27 14:17:56,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:56,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:56,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:56,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:17:56,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:56,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:17:56,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:56,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:17:56,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:56,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:17:56,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:56,751 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 46 proven. 161 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-10-27 14:17:56,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469617446] [2020-10-27 14:17:56,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:17:56,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:17:56,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739368480] [2020-10-27 14:17:56,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:17:56,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:17:56,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:17:56,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:17:56,753 INFO L87 Difference]: Start difference. First operand 1202 states and 1804 transitions. Second operand 20 states. [2020-10-27 14:17:59,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:17:59,003 INFO L93 Difference]: Finished difference Result 2373 states and 3520 transitions. [2020-10-27 14:17:59,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:17:59,004 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 80 [2020-10-27 14:17:59,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:17:59,012 INFO L225 Difference]: With dead ends: 2373 [2020-10-27 14:17:59,012 INFO L226 Difference]: Without dead ends: 2369 [2020-10-27 14:17:59,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=187, Invalid=1145, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:17:59,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2369 states. [2020-10-27 14:17:59,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2369 to 1095. [2020-10-27 14:17:59,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1095 states. [2020-10-27 14:17:59,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 1643 transitions. [2020-10-27 14:17:59,240 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 1643 transitions. Word has length 80 [2020-10-27 14:17:59,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:17:59,240 INFO L481 AbstractCegarLoop]: Abstraction has 1095 states and 1643 transitions. [2020-10-27 14:17:59,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:17:59,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 1643 transitions. [2020-10-27 14:17:59,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 14:17:59,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:17:59,242 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 14, 3, 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] [2020-10-27 14:17:59,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 14:17:59,242 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:17:59,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:17:59,243 INFO L82 PathProgramCache]: Analyzing trace with hash -2053097356, now seen corresponding path program 21 times [2020-10-27 14:17:59,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:17:59,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837030840] [2020-10-27 14:17:59,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:17:59,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:59,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:59,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:59,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:00,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:04,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:04,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 14:18:04,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:18:04,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:18:04,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:04,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:18:04,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:18:04,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 14:18:04,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:04,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:18:04,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:04,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:04,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:04,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:18:04,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:04,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:18:04,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:04,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:04,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:04,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:04,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:04,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-27 14:18:04,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:04,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:04,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:04,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:18:04,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:04,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:18:04,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:04,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:18:04,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:04,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:18:04,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:04,956 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 5 proven. 164 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-10-27 14:18:04,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837030840] [2020-10-27 14:18:04,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:18:04,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:18:04,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376125559] [2020-10-27 14:18:04,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:18:04,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:18:04,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:18:04,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:18:04,959 INFO L87 Difference]: Start difference. First operand 1095 states and 1643 transitions. Second operand 18 states. [2020-10-27 14:18:06,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:18:06,879 INFO L93 Difference]: Finished difference Result 2369 states and 3606 transitions. [2020-10-27 14:18:06,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:18:06,881 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 80 [2020-10-27 14:18:06,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:18:06,885 INFO L225 Difference]: With dead ends: 2369 [2020-10-27 14:18:06,885 INFO L226 Difference]: Without dead ends: 1581 [2020-10-27 14:18:06,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:18:06,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1581 states. [2020-10-27 14:18:07,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 1051. [2020-10-27 14:18:07,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1051 states. [2020-10-27 14:18:07,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1578 transitions. [2020-10-27 14:18:07,128 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1578 transitions. Word has length 80 [2020-10-27 14:18:07,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:18:07,129 INFO L481 AbstractCegarLoop]: Abstraction has 1051 states and 1578 transitions. [2020-10-27 14:18:07,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:18:07,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1578 transitions. [2020-10-27 14:18:07,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 14:18:07,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:07,130 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 15, 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] [2020-10-27 14:18:07,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 14:18:07,131 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:07,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:07,131 INFO L82 PathProgramCache]: Analyzing trace with hash -91522698, now seen corresponding path program 22 times [2020-10-27 14:18:07,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:07,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614437061] [2020-10-27 14:18:07,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:07,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:07,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:07,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:07,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:09,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:12,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:12,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 14:18:12,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:18:12,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:18:12,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:12,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:18:12,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:18:12,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 14:18:12,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:12,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:18:12,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:12,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:12,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:12,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:18:12,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:12,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:18:12,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:12,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:12,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:12,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:12,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:12,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-27 14:18:12,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:12,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:12,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:12,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:18:12,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:12,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:18:12,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:12,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:18:12,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:12,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:18:12,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:12,622 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-27 14:18:12,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614437061] [2020-10-27 14:18:12,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:18:12,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:18:12,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272089979] [2020-10-27 14:18:12,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:18:12,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:18:12,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:18:12,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:18:12,624 INFO L87 Difference]: Start difference. First operand 1051 states and 1578 transitions. Second operand 16 states. [2020-10-27 14:18:14,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:18:14,447 INFO L93 Difference]: Finished difference Result 1321 states and 1953 transitions. [2020-10-27 14:18:14,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:18:14,448 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 80 [2020-10-27 14:18:14,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:18:14,451 INFO L225 Difference]: With dead ends: 1321 [2020-10-27 14:18:14,451 INFO L226 Difference]: Without dead ends: 1317 [2020-10-27 14:18:14,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:18:14,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2020-10-27 14:18:14,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 966. [2020-10-27 14:18:14,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 966 states. [2020-10-27 14:18:14,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 1450 transitions. [2020-10-27 14:18:14,637 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 1450 transitions. Word has length 80 [2020-10-27 14:18:14,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:18:14,638 INFO L481 AbstractCegarLoop]: Abstraction has 966 states and 1450 transitions. [2020-10-27 14:18:14,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:18:14,638 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 1450 transitions. [2020-10-27 14:18:14,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 14:18:14,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:14,639 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 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 14:18:14,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 14:18:14,639 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:14,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:14,640 INFO L82 PathProgramCache]: Analyzing trace with hash -145915596, now seen corresponding path program 23 times [2020-10-27 14:18:14,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:14,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694444465] [2020-10-27 14:18:14,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:14,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:14,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:14,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:14,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:16,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:19,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:19,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 14:18:19,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:18:19,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:18:19,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:19,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:18:19,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:18:19,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 14:18:19,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:19,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:18:19,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:19,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:19,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:19,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:18:19,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:19,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:18:19,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:19,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:19,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:19,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:19,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:19,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-27 14:18:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:19,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:19,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:19,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:18:19,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:19,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:18:19,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:19,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:18:19,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:19,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:18:19,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:20,048 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-10-27 14:18:20,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694444465] [2020-10-27 14:18:20,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:18:20,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:18:20,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315291762] [2020-10-27 14:18:20,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:18:20,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:18:20,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:18:20,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:18:20,051 INFO L87 Difference]: Start difference. First operand 966 states and 1450 transitions. Second operand 14 states. [2020-10-27 14:18:21,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:18:21,701 INFO L93 Difference]: Finished difference Result 1188 states and 1744 transitions. [2020-10-27 14:18:21,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:18:21,701 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2020-10-27 14:18:21,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:18:21,706 INFO L225 Difference]: With dead ends: 1188 [2020-10-27 14:18:21,706 INFO L226 Difference]: Without dead ends: 1184 [2020-10-27 14:18:21,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:18:21,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2020-10-27 14:18:21,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 872. [2020-10-27 14:18:21,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 872 states. [2020-10-27 14:18:21,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1310 transitions. [2020-10-27 14:18:21,971 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1310 transitions. Word has length 80 [2020-10-27 14:18:21,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:18:21,971 INFO L481 AbstractCegarLoop]: Abstraction has 872 states and 1310 transitions. [2020-10-27 14:18:21,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:18:21,972 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1310 transitions. [2020-10-27 14:18:21,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 14:18:21,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:21,973 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 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] [2020-10-27 14:18:21,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 14:18:21,974 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:21,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:21,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1243954232, now seen corresponding path program 2 times [2020-10-27 14:18:21,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:21,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405232631] [2020-10-27 14:18:21,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:21,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:21,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:21,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:22,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:23,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:26,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:26,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 14:18:26,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:18:26,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:18:26,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:26,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:18:26,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:18:26,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 14:18:26,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:27,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:18:27,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:27,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:27,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:27,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:18:27,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:27,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:18:27,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:27,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:27,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:27,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:27,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:27,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-27 14:18:27,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:27,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:27,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:27,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:18:27,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:27,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:18:27,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:27,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:18:27,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:27,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:18:27,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:27,206 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 2 proven. 35 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-27 14:18:27,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405232631] [2020-10-27 14:18:27,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:18:27,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:18:27,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053747729] [2020-10-27 14:18:27,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:18:27,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:18:27,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:18:27,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:18:27,213 INFO L87 Difference]: Start difference. First operand 872 states and 1310 transitions. Second operand 11 states. [2020-10-27 14:18:28,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:18:28,399 INFO L93 Difference]: Finished difference Result 971 states and 1435 transitions. [2020-10-27 14:18:28,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:18:28,400 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 80 [2020-10-27 14:18:28,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:18:28,403 INFO L225 Difference]: With dead ends: 971 [2020-10-27 14:18:28,403 INFO L226 Difference]: Without dead ends: 967 [2020-10-27 14:18:28,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:18:28,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2020-10-27 14:18:28,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 783. [2020-10-27 14:18:28,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 783 states. [2020-10-27 14:18:28,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 1189 transitions. [2020-10-27 14:18:28,631 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 1189 transitions. Word has length 80 [2020-10-27 14:18:28,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:18:28,631 INFO L481 AbstractCegarLoop]: Abstraction has 783 states and 1189 transitions. [2020-10-27 14:18:28,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:18:28,632 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 1189 transitions. [2020-10-27 14:18:28,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 14:18:28,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:28,633 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:18:28,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 14:18:28,634 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:28,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:28,634 INFO L82 PathProgramCache]: Analyzing trace with hash 112296206, now seen corresponding path program 1 times [2020-10-27 14:18:28,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:28,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688162264] [2020-10-27 14:18:28,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:28,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:28,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:28,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:28,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:29,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:29,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:29,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:29,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:29,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:29,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:29,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:29,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:29,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:29,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:31,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:32,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:32,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:32,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:32,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:32,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:32,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:32,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:32,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:32,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:32,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:33,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:33,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 14:18:33,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-27 14:18:33,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-27 14:18:33,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:33,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:18:33,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 68 [2020-10-27 14:18:33,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:18:33,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:33,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:18:33,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:33,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:33,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:33,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:18:33,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:33,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:18:33,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:33,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:33,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:33,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:33,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:33,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-27 14:18:33,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:33,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:33,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:33,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:18:33,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:33,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:18:33,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:33,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:18:33,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:33,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:18:33,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:33,746 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-10-27 14:18:33,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688162264] [2020-10-27 14:18:33,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:18:33,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:18:33,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280210772] [2020-10-27 14:18:33,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:18:33,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:18:33,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:18:33,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:18:33,748 INFO L87 Difference]: Start difference. First operand 783 states and 1189 transitions. Second operand 6 states. [2020-10-27 14:18:34,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:18:34,178 INFO L93 Difference]: Finished difference Result 1426 states and 2197 transitions. [2020-10-27 14:18:34,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 14:18:34,179 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 85 [2020-10-27 14:18:34,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:18:34,182 INFO L225 Difference]: With dead ends: 1426 [2020-10-27 14:18:34,182 INFO L226 Difference]: Without dead ends: 851 [2020-10-27 14:18:34,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:18:34,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2020-10-27 14:18:34,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 567. [2020-10-27 14:18:34,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 567 states. [2020-10-27 14:18:34,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 835 transitions. [2020-10-27 14:18:34,387 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 835 transitions. Word has length 85 [2020-10-27 14:18:34,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:18:34,387 INFO L481 AbstractCegarLoop]: Abstraction has 567 states and 835 transitions. [2020-10-27 14:18:34,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:18:34,388 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 835 transitions. [2020-10-27 14:18:34,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-27 14:18:34,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:34,389 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 3, 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] [2020-10-27 14:18:34,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 14:18:34,389 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:34,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:34,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1449506898, now seen corresponding path program 5 times [2020-10-27 14:18:34,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:34,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53674483] [2020-10-27 14:18:34,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:34,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:34,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:34,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:34,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking...