/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-fpi/brs4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 03:50:32,614 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 03:50:32,618 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 03:50:32,671 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 03:50:32,671 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 03:50:32,678 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 03:50:32,680 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 03:50:32,685 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 03:50:32,689 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 03:50:32,695 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 03:50:32,697 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 03:50:32,698 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 03:50:32,699 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 03:50:32,701 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 03:50:32,705 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 03:50:32,707 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 03:50:32,708 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 03:50:32,711 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 03:50:32,718 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 03:50:32,726 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 03:50:32,728 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 03:50:32,730 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 03:50:32,731 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 03:50:32,733 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 03:50:32,743 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 03:50:32,743 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 03:50:32,744 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 03:50:32,746 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 03:50:32,747 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 03:50:32,748 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 03:50:32,748 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 03:50:32,749 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 03:50:32,752 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 03:50:32,753 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 03:50:32,754 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 03:50:32,754 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 03:50:32,755 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 03:50:32,755 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 03:50:32,756 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 03:50:32,757 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 03:50:32,757 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 03:50:32,765 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 [2020-10-29 03:50:32,795 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 03:50:32,796 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 03:50:32,797 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 03:50:32,797 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 03:50:32,798 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 03:50:32,798 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 03:50:32,798 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 03:50:32,798 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 03:50:32,799 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 03:50:32,799 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 03:50:32,799 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 03:50:32,799 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 03:50:32,800 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 03:50:32,800 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 03:50:32,800 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 03:50:32,800 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 03:50:32,801 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 03:50:32,801 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 03:50:32,801 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 03:50:32,801 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 03:50:32,802 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 03:50:32,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 03:50:32,802 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 03:50:32,815 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 03:50:32,816 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 03:50:32,816 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 03:50:32,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 03:50:32,816 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 03:50:32,817 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 03:50:32,817 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 03:50:33,161 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 03:50:33,185 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 03:50:33,188 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 03:50:33,189 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 03:50:33,190 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 03:50:33,191 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs4.c [2020-10-29 03:50:33,276 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ede290e60/71f4aff534c2419e81dad8b8cafca467/FLAG23d334aee [2020-10-29 03:50:33,865 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 03:50:33,865 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs4.c [2020-10-29 03:50:33,874 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ede290e60/71f4aff534c2419e81dad8b8cafca467/FLAG23d334aee [2020-10-29 03:50:34,199 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ede290e60/71f4aff534c2419e81dad8b8cafca467 [2020-10-29 03:50:34,202 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 03:50:34,209 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 03:50:34,214 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 03:50:34,214 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 03:50:34,218 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 03:50:34,218 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:50:34" (1/1) ... [2020-10-29 03:50:34,222 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24440aea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:50:34, skipping insertion in model container [2020-10-29 03:50:34,222 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:50:34" (1/1) ... [2020-10-29 03:50:34,230 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 03:50:34,245 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 03:50:34,416 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 03:50:34,425 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 03:50:34,449 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 03:50:34,468 INFO L208 MainTranslator]: Completed translation [2020-10-29 03:50:34,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:50:34 WrapperNode [2020-10-29 03:50:34,470 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 03:50:34,471 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 03:50:34,471 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 03:50:34,472 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 03:50:34,486 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:50:34" (1/1) ... [2020-10-29 03:50:34,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:50:34" (1/1) ... [2020-10-29 03:50:34,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:50:34" (1/1) ... [2020-10-29 03:50:34,509 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:50:34" (1/1) ... [2020-10-29 03:50:34,529 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:50:34" (1/1) ... [2020-10-29 03:50:34,541 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:50:34" (1/1) ... [2020-10-29 03:50:34,543 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:50:34" (1/1) ... [2020-10-29 03:50:34,551 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 03:50:34,552 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 03:50:34,553 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 03:50:34,553 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 03:50:34,555 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:50:34" (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 [2020-10-29 03:50:34,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 03:50:34,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 03:50:34,654 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 03:50:34,655 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 03:50:34,656 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 03:50:34,656 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 03:50:34,657 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 03:50:34,657 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 03:50:34,657 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 03:50:34,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 03:50:34,659 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 03:50:34,659 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 03:50:34,659 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 03:50:34,660 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-29 03:50:34,660 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 03:50:34,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-29 03:50:34,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 03:50:34,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 03:50:34,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 03:50:34,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 03:50:34,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 03:50:34,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 03:50:35,253 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 03:50:35,253 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-29 03:50:35,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:50:35 BoogieIcfgContainer [2020-10-29 03:50:35,255 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 03:50:35,257 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 03:50:35,257 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 03:50:35,260 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 03:50:35,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 03:50:34" (1/3) ... [2020-10-29 03:50:35,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e3cf347 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 03:50:35, skipping insertion in model container [2020-10-29 03:50:35,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:50:34" (2/3) ... [2020-10-29 03:50:35,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e3cf347 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 03:50:35, skipping insertion in model container [2020-10-29 03:50:35,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:50:35" (3/3) ... [2020-10-29 03:50:35,264 INFO L111 eAbstractionObserver]: Analyzing ICFG brs4.c [2020-10-29 03:50:35,276 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 03:50:35,281 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 03:50:35,294 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 03:50:35,321 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 03:50:35,322 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 03:50:35,322 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 03:50:35,322 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 03:50:35,322 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 03:50:35,322 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 03:50:35,322 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 03:50:35,322 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 03:50:35,340 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-29 03:50:35,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 03:50:35,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:50:35,358 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] [2020-10-29 03:50:35,358 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:50:35,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:50:35,365 INFO L82 PathProgramCache]: Analyzing trace with hash 288317380, now seen corresponding path program 1 times [2020-10-29 03:50:35,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:50:35,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1500965973] [2020-10-29 03:50:35,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:50:35,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:35,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:35,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:35,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:35,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:35,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 03:50:35,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:50:35,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 360 [2020-10-29 03:50:35,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:35,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:35,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:50:35,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 03:50:35,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:50:35,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-29 03:50:35,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:50:35,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:35,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:35,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:35,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:50:35,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:50:35,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 03:50:35,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:35,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:35,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:50:35,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:50:35,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:50:35,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:50:36,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:50:36,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:36,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:36,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:36,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:36,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:50:36,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:50:36,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:50:36,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:36,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:36,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:50:36,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:50:36,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:50:36,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 03:50:36,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:50:36,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1500965973] [2020-10-29 03:50:36,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 03:50:36,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 03:50:36,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232707390] [2020-10-29 03:50:36,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-29 03:50:36,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:50:36,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-29 03:50:36,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-29 03:50:36,064 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-10-29 03:50:36,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:50:36,207 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2020-10-29 03:50:36,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-29 03:50:36,209 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-10-29 03:50:36,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:50:36,217 INFO L225 Difference]: With dead ends: 61 [2020-10-29 03:50:36,217 INFO L226 Difference]: Without dead ends: 27 [2020-10-29 03:50:36,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-29 03:50:36,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-29 03:50:36,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-29 03:50:36,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-29 03:50:36,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-29 03:50:36,264 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 22 [2020-10-29 03:50:36,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:50:36,264 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-29 03:50:36,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-29 03:50:36,265 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-29 03:50:36,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 03:50:36,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:50:36,266 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] [2020-10-29 03:50:36,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 03:50:36,267 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:50:36,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:50:36,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1231035376, now seen corresponding path program 1 times [2020-10-29 03:50:36,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:50:36,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262828006] [2020-10-29 03:50:36,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:50:36,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:36,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:36,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:36,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:36,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 03:50:36,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:50:36,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 409 [2020-10-29 03:50:36,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:36,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:36,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 03:50:36,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:50:36,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 03:50:36,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-29 03:50:36,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:50:36,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:36,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:36,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:36,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:50:36,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:50:36,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 03:50:36,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:36,810 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:36,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:50:36,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:50:36,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:50:36,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:50:36,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:50:36,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:36,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:36,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:36,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:50:36,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:50:36,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 03:50:36,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:36,825 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:36,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:50:36,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:50:36,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:50:36,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:50:36,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:50:36,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262828006] [2020-10-29 03:50:36,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 03:50:36,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 03:50:36,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528882979] [2020-10-29 03:50:36,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 03:50:36,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:50:36,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 03:50:36,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 03:50:36,834 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 5 states. [2020-10-29 03:50:36,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:50:36,998 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-10-29 03:50:36,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 03:50:36,999 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-29 03:50:36,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:50:37,000 INFO L225 Difference]: With dead ends: 40 [2020-10-29 03:50:37,000 INFO L226 Difference]: Without dead ends: 29 [2020-10-29 03:50:37,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 03:50:37,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-29 03:50:37,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-29 03:50:37,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-29 03:50:37,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-29 03:50:37,011 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 22 [2020-10-29 03:50:37,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:50:37,011 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-29 03:50:37,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 03:50:37,011 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-29 03:50:37,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 03:50:37,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:50:37,013 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] [2020-10-29 03:50:37,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 03:50:37,013 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:50:37,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:50:37,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1214934215, now seen corresponding path program 1 times [2020-10-29 03:50:37,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:50:37,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272237671] [2020-10-29 03:50:37,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:50:37,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:37,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:37,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:37,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:37,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:37,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 03:50:37,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:50:37,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 848 [2020-10-29 03:50:37,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:37,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:37,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 03:50:37,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:50:37,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 03:50:37,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:50:38,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:50:38,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:38,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:38,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:38,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:50:38,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:50:38,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 03:50:38,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:38,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:38,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:50:38,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:50:38,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:50:38,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:50:38,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:50:38,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:38,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:38,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:38,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:50:38,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:50:38,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:50:38,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:38,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:38,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:50:38,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:50:38,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:50:38,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:50:38,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:50:38,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272237671] [2020-10-29 03:50:38,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:50:38,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 03:50:38,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614585477] [2020-10-29 03:50:38,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 03:50:38,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:50:38,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 03:50:38,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-29 03:50:38,068 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 10 states. [2020-10-29 03:50:38,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:50:38,468 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2020-10-29 03:50:38,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 03:50:38,469 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-29 03:50:38,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:50:38,470 INFO L225 Difference]: With dead ends: 69 [2020-10-29 03:50:38,471 INFO L226 Difference]: Without dead ends: 57 [2020-10-29 03:50:38,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:50:38,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-29 03:50:38,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2020-10-29 03:50:38,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-29 03:50:38,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2020-10-29 03:50:38,482 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 28 [2020-10-29 03:50:38,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:50:38,483 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2020-10-29 03:50:38,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 03:50:38,483 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2020-10-29 03:50:38,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 03:50:38,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:50:38,484 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] [2020-10-29 03:50:38,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 03:50:38,485 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:50:38,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:50:38,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1894992585, now seen corresponding path program 1 times [2020-10-29 03:50:38,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:50:38,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511499707] [2020-10-29 03:50:38,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:50:38,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:38,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:38,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:38,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:39,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:39,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 03:50:39,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:50:39,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 753 [2020-10-29 03:50:39,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:39,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:39,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 03:50:39,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:50:39,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 03:50:39,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:50:39,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:50:39,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:39,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:39,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:39,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:50:39,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:50:39,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 03:50:39,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:39,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:39,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:50:39,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:50:39,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:50:39,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 03:50:39,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:50:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:39,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:39,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:39,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:50:39,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:50:39,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:50:39,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:39,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:39,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:50:39,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:50:39,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:50:39,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:50:39,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 03:50:39,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511499707] [2020-10-29 03:50:39,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 03:50:39,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 03:50:39,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282784373] [2020-10-29 03:50:39,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 03:50:39,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:50:39,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 03:50:39,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 03:50:39,405 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand 8 states. [2020-10-29 03:50:39,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:50:39,707 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2020-10-29 03:50:39,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 03:50:39,708 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-29 03:50:39,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:50:39,709 INFO L225 Difference]: With dead ends: 53 [2020-10-29 03:50:39,709 INFO L226 Difference]: Without dead ends: 39 [2020-10-29 03:50:39,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-29 03:50:39,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-29 03:50:39,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-29 03:50:39,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-29 03:50:39,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-10-29 03:50:39,718 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 28 [2020-10-29 03:50:39,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:50:39,718 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-10-29 03:50:39,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 03:50:39,718 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-10-29 03:50:39,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 03:50:39,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:50:39,720 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:50:39,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 03:50:39,720 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:50:39,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:50:39,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1229914284, now seen corresponding path program 1 times [2020-10-29 03:50:39,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:50:39,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208129275] [2020-10-29 03:50:39,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:50:39,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:39,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:39,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:39,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:40,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:40,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:40,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:41,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:41,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:41,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:41,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:41,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:41,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:41,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:42,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:42,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:42,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:42,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:42,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:42,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:42,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:42,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:44,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:44,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 03:50:44,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-29 03:50:44,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 03:50:44,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:44,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:44,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 03:50:44,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:50:44,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 03:50:44,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:50:44,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:50:44,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:44,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:45,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:45,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:50:45,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:50:45,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 03:50:45,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:45,007 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:45,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:50:45,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:50:45,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:50:45,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:50:45,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:50:45,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:45,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:45,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:45,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:50:45,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:50:45,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:50:45,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:45,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:45,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:50:45,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:50:45,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:50:45,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:50:45,021 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:50:45,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [208129275] [2020-10-29 03:50:45,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:50:45,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 03:50:45,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852138879] [2020-10-29 03:50:45,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 03:50:45,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:50:45,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 03:50:45,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-29 03:50:45,023 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 13 states. [2020-10-29 03:50:45,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:50:45,575 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2020-10-29 03:50:45,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 03:50:45,575 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-29 03:50:45,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:50:45,576 INFO L225 Difference]: With dead ends: 70 [2020-10-29 03:50:45,577 INFO L226 Difference]: Without dead ends: 41 [2020-10-29 03:50:45,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2020-10-29 03:50:45,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-29 03:50:45,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2020-10-29 03:50:45,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-29 03:50:45,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-10-29 03:50:45,595 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 34 [2020-10-29 03:50:45,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:50:45,596 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-10-29 03:50:45,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 03:50:45,597 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-10-29 03:50:45,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 03:50:45,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:50:45,599 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1] [2020-10-29 03:50:45,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 03:50:45,600 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:50:45,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:50:45,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1090575102, now seen corresponding path program 2 times [2020-10-29 03:50:45,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:50:45,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108286026] [2020-10-29 03:50:45,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:50:45,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:45,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:45,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:45,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:45,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:45,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:46,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:46,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:46,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:46,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:46,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:47,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:47,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:48,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:49,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:49,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:49,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:49,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:50,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:50,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:50,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 03:50:50,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-29 03:50:50,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 03:50:50,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:50,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:50,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 03:50:50,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:50:50,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 03:50:50,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:50:50,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:50:50,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:50,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:50,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:50,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:50:50,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:50:50,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 03:50:50,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:50,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:50,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:50:50,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:50:50,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:50:50,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:50:50,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:50:50,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:50,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:50,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:50,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:50:50,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:50:50,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:50:50,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:50,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:50,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:50:50,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:50:50,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:50:50,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:50:50,922 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 03:50:50,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108286026] [2020-10-29 03:50:50,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:50:50,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 03:50:50,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688251161] [2020-10-29 03:50:50,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 03:50:50,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:50:50,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 03:50:50,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-29 03:50:50,929 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 13 states. [2020-10-29 03:50:51,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:50:51,504 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2020-10-29 03:50:51,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 03:50:51,505 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-10-29 03:50:51,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:50:51,506 INFO L225 Difference]: With dead ends: 67 [2020-10-29 03:50:51,506 INFO L226 Difference]: Without dead ends: 48 [2020-10-29 03:50:51,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2020-10-29 03:50:51,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-29 03:50:51,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2020-10-29 03:50:51,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-29 03:50:51,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2020-10-29 03:50:51,515 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 37 [2020-10-29 03:50:51,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:50:51,515 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2020-10-29 03:50:51,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 03:50:51,515 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2020-10-29 03:50:51,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 03:50:51,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:50:51,516 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:50:51,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 03:50:51,517 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:50:51,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:50:51,517 INFO L82 PathProgramCache]: Analyzing trace with hash -264327849, now seen corresponding path program 3 times [2020-10-29 03:50:51,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:50:51,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689845146] [2020-10-29 03:50:51,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:50:51,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:51,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:51,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:51,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:52,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:52,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:52,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:52,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:53,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:53,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:54,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:54,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:54,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:54,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:54,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:54,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:56,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:56,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 03:50:56,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 03:50:56,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 03:50:56,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:56,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:56,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 03:50:56,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:50:56,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 03:50:56,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:50:56,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:50:56,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:56,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:56,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:56,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:50:56,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:50:56,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:50:56,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:56,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:56,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:50:56,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:50:56,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:50:56,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:50:56,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:50:56,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:56,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:56,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:56,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:50:56,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:50:56,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:50:56,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:56,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:56,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:50:56,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:50:56,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:50:56,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:50:57,009 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:50:57,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689845146] [2020-10-29 03:50:57,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:50:57,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 03:50:57,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463530661] [2020-10-29 03:50:57,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 03:50:57,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:50:57,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 03:50:57,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:50:57,012 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 17 states. [2020-10-29 03:50:58,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:50:58,013 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2020-10-29 03:50:58,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 03:50:58,014 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2020-10-29 03:50:58,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:50:58,015 INFO L225 Difference]: With dead ends: 78 [2020-10-29 03:50:58,015 INFO L226 Difference]: Without dead ends: 47 [2020-10-29 03:50:58,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2020-10-29 03:50:58,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-29 03:50:58,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-10-29 03:50:58,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-29 03:50:58,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-10-29 03:50:58,030 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 40 [2020-10-29 03:50:58,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:50:58,031 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-10-29 03:50:58,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 03:50:58,033 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-10-29 03:50:58,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 03:50:58,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:50:58,035 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:50:58,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 03:50:58,035 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:50:58,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:50:58,036 INFO L82 PathProgramCache]: Analyzing trace with hash -814888421, now seen corresponding path program 4 times [2020-10-29 03:50:58,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:50:58,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1431477203] [2020-10-29 03:50:58,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:50:58,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:58,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:58,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:58,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:58,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:58,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:58,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:58,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:58,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:00,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:00,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:00,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:00,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:00,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:01,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:03,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:51:03,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 03:51:03,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 03:51:03,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 03:51:03,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:51:03,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:51:03,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 03:51:03,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:51:03,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 03:51:03,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 03:51:03,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:51:03,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:51:03,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:03,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:51:03,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:51:03,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:51:03,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:51:03,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:51:03,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:51:03,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:51:03,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:51:03,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:51:03,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:51:03,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:51:03,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:51:03,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:03,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:51:03,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:51:03,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:51:03,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:51:03,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:51:03,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:51:03,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:51:03,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:51:03,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:51:03,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:51:03,282 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 03:51:03,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1431477203] [2020-10-29 03:51:03,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:51:03,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 03:51:03,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421980883] [2020-10-29 03:51:03,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 03:51:03,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:51:03,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 03:51:03,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:51:03,285 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 14 states. [2020-10-29 03:51:04,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:51:04,107 INFO L93 Difference]: Finished difference Result 97 states and 110 transitions. [2020-10-29 03:51:04,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 03:51:04,107 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 43 [2020-10-29 03:51:04,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:51:04,109 INFO L225 Difference]: With dead ends: 97 [2020-10-29 03:51:04,109 INFO L226 Difference]: Without dead ends: 61 [2020-10-29 03:51:04,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2020-10-29 03:51:04,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-29 03:51:04,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2020-10-29 03:51:04,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-29 03:51:04,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2020-10-29 03:51:04,120 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 43 [2020-10-29 03:51:04,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:51:04,121 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2020-10-29 03:51:04,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 03:51:04,121 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2020-10-29 03:51:04,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 03:51:04,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:51:04,122 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:51:04,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 03:51:04,122 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:51:04,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:51:04,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1651460684, now seen corresponding path program 5 times [2020-10-29 03:51:04,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:51:04,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718190196] [2020-10-29 03:51:04,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:51:04,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:51:04,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:04,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:04,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:04,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:05,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:05,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:08,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:08,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:09,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:51:09,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-29 03:51:09,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 03:51:09,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 03:51:09,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:51:09,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:51:09,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 03:51:09,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:51:09,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 03:51:09,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:51:10,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:51:10,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:51:10,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:10,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:51:10,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:51:10,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:51:10,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:51:10,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:51:10,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:51:10,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:51:10,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:51:10,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:51:10,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:51:10,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:51:10,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:51:10,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:10,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:51:10,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:51:10,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:51:10,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:51:10,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:51:10,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:51:10,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:51:10,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:51:10,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:51:10,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:51:10,223 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:51:10,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718190196] [2020-10-29 03:51:10,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:51:10,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 03:51:10,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259195951] [2020-10-29 03:51:10,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 03:51:10,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:51:10,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 03:51:10,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2020-10-29 03:51:10,226 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 21 states. [2020-10-29 03:51:11,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:51:11,269 INFO L93 Difference]: Finished difference Result 86 states and 97 transitions. [2020-10-29 03:51:11,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 03:51:11,269 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2020-10-29 03:51:11,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:51:11,270 INFO L225 Difference]: With dead ends: 86 [2020-10-29 03:51:11,270 INFO L226 Difference]: Without dead ends: 53 [2020-10-29 03:51:11,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2020-10-29 03:51:11,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-29 03:51:11,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2020-10-29 03:51:11,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-29 03:51:11,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-10-29 03:51:11,280 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 46 [2020-10-29 03:51:11,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:51:11,280 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-10-29 03:51:11,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 03:51:11,280 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-10-29 03:51:11,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 03:51:11,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:51:11,281 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:51:11,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 03:51:11,282 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:51:11,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:51:11,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1286146206, now seen corresponding path program 6 times [2020-10-29 03:51:11,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:51:11,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824314693] [2020-10-29 03:51:11,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:51:11,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:51:11,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:11,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:11,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:11,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:11,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:11,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:11,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:12,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:12,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:12,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:13,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:13,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:14,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:14,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:14,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:14,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:14,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:15,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:15,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:16,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:51:16,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 03:51:16,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-29 03:51:16,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 03:51:16,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:51:16,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:51:16,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 03:51:16,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:51:16,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 03:51:16,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:51:16,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:51:16,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:51:16,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:16,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:51:16,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:51:16,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:51:16,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:51:16,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:51:16,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:51:16,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:51:16,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:51:16,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:51:16,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:51:16,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:51:16,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:51:16,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:16,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:51:16,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:51:16,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:51:16,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 03:51:16,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:51:16,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:51:16,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:51:16,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:51:16,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:51:16,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:51:16,480 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:51:16,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824314693] [2020-10-29 03:51:16,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:51:16,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 03:51:16,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215405315] [2020-10-29 03:51:16,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 03:51:16,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:51:16,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 03:51:16,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:51:16,483 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 14 states. [2020-10-29 03:51:16,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:51:16,856 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2020-10-29 03:51:16,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 03:51:16,856 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-10-29 03:51:16,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:51:16,857 INFO L225 Difference]: With dead ends: 92 [2020-10-29 03:51:16,858 INFO L226 Difference]: Without dead ends: 57 [2020-10-29 03:51:16,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:51:16,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-29 03:51:16,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-10-29 03:51:16,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-29 03:51:16,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-10-29 03:51:16,867 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 49 [2020-10-29 03:51:16,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:51:16,868 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-10-29 03:51:16,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 03:51:16,868 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-10-29 03:51:16,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 03:51:16,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:51:16,869 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:51:16,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 03:51:16,869 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:51:16,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:51:16,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1805023033, now seen corresponding path program 7 times [2020-10-29 03:51:16,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:51:16,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602941977] [2020-10-29 03:51:16,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:51:16,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:51:16,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:17,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:17,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:18,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:18,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:19,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:19,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:19,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:19,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:20,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:20,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:21,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:21,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:21,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:22,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:51:22,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 03:51:22,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 03:51:22,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5133 [2020-10-29 03:51:22,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:51:22,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:51:22,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-29 03:51:22,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:51:22,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 03:51:22,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:51:23,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:51:23,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:51:23,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:23,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:51:23,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:51:23,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:51:23,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:51:23,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:51:23,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:51:23,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:51:23,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:51:23,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:51:23,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:51:23,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:51:23,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:51:23,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:23,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:51:23,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:51:23,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:51:23,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:51:23,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:51:23,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:51:23,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:51:23,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:51:23,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:51:23,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:51:23,423 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:51:23,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602941977] [2020-10-29 03:51:23,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:51:23,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-29 03:51:23,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142332630] [2020-10-29 03:51:23,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-29 03:51:23,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:51:23,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-29 03:51:23,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2020-10-29 03:51:23,426 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 25 states. [2020-10-29 03:51:25,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:51:25,770 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2020-10-29 03:51:25,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 03:51:25,771 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 52 [2020-10-29 03:51:25,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:51:25,774 INFO L225 Difference]: With dead ends: 95 [2020-10-29 03:51:25,774 INFO L226 Difference]: Without dead ends: 88 [2020-10-29 03:51:25,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=167, Invalid=1393, Unknown=0, NotChecked=0, Total=1560 [2020-10-29 03:51:25,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-29 03:51:25,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 80. [2020-10-29 03:51:25,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-29 03:51:25,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 90 transitions. [2020-10-29 03:51:25,791 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 90 transitions. Word has length 52 [2020-10-29 03:51:25,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:51:25,791 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 90 transitions. [2020-10-29 03:51:25,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-29 03:51:25,791 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 90 transitions. [2020-10-29 03:51:25,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 03:51:25,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:51:25,796 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:51:25,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 03:51:25,796 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:51:25,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:51:25,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1551637753, now seen corresponding path program 8 times [2020-10-29 03:51:25,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:51:25,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886506084] [2020-10-29 03:51:25,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:51:25,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:51:25,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:25,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:25,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:25,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:26,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:26,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:26,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:26,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:26,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:26,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:26,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:26,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:27,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:28,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:28,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:28,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:28,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:28,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:28,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:29,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:29,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:29,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:30,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:30,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:30,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:30,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:51:30,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 03:51:30,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-10-29 03:51:30,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 03:51:30,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:51:30,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:51:30,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 03:51:30,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:51:30,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 03:51:30,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:51:31,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:51:31,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:51:31,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:31,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:51:31,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:51:31,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:51:31,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:51:31,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:51:31,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:51:31,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:51:31,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:51:31,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:51:31,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:51:31,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:51:31,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:51:31,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:31,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:51:31,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:51:31,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:51:31,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:51:31,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:51:31,015 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:51:31,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:51:31,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:51:31,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:51:31,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:51:31,023 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 42 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:51:31,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886506084] [2020-10-29 03:51:31,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:51:31,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 03:51:31,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638664609] [2020-10-29 03:51:31,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 03:51:31,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:51:31,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 03:51:31,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:51:31,026 INFO L87 Difference]: Start difference. First operand 80 states and 90 transitions. Second operand 16 states. [2020-10-29 03:51:31,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:51:31,546 INFO L93 Difference]: Finished difference Result 152 states and 170 transitions. [2020-10-29 03:51:31,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 03:51:31,547 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 55 [2020-10-29 03:51:31,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:51:31,550 INFO L225 Difference]: With dead ends: 152 [2020-10-29 03:51:31,550 INFO L226 Difference]: Without dead ends: 93 [2020-10-29 03:51:31,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2020-10-29 03:51:31,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-29 03:51:31,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 80. [2020-10-29 03:51:31,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-29 03:51:31,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2020-10-29 03:51:31,572 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 55 [2020-10-29 03:51:31,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:51:31,572 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2020-10-29 03:51:31,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 03:51:31,573 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2020-10-29 03:51:31,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 03:51:31,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:51:31,575 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:51:31,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 03:51:31,575 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:51:31,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:51:31,576 INFO L82 PathProgramCache]: Analyzing trace with hash 2139317500, now seen corresponding path program 9 times [2020-10-29 03:51:31,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:51:31,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173835826] [2020-10-29 03:51:31,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:51:31,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:51:31,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:31,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:31,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:31,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:31,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:31,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:32,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:32,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:32,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:32,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:32,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:32,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:32,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:33,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:33,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:33,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:33,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:33,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:33,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:33,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:33,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:33,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:33,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:35,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:35,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:35,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:36,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:51:36,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 03:51:36,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 26 [2020-10-29 03:51:36,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 03:51:36,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:51:36,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:51:36,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 03:51:36,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:51:36,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 03:51:36,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:51:36,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:51:36,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:51:36,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:36,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:51:36,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:51:36,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:51:36,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:51:36,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:51:36,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:51:36,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:51:36,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:51:36,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:51:36,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:51:36,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:51:36,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:51:36,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:36,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:51:36,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:51:36,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:51:36,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:51:36,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:51:36,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:51:36,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:51:36,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:51:36,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:51:36,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:51:36,804 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 35 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:51:36,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173835826] [2020-10-29 03:51:36,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:51:36,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 03:51:36,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683075465] [2020-10-29 03:51:36,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 03:51:36,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:51:36,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 03:51:36,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:51:36,808 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand 16 states. [2020-10-29 03:51:37,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:51:37,399 INFO L93 Difference]: Finished difference Result 106 states and 117 transitions. [2020-10-29 03:51:37,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 03:51:37,403 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 55 [2020-10-29 03:51:37,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:51:37,404 INFO L225 Difference]: With dead ends: 106 [2020-10-29 03:51:37,404 INFO L226 Difference]: Without dead ends: 68 [2020-10-29 03:51:37,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2020-10-29 03:51:37,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-29 03:51:37,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2020-10-29 03:51:37,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-29 03:51:37,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2020-10-29 03:51:37,421 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 55 [2020-10-29 03:51:37,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:51:37,421 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2020-10-29 03:51:37,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 03:51:37,422 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2020-10-29 03:51:37,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 03:51:37,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:51:37,423 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:51:37,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 03:51:37,423 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:51:37,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:51:37,424 INFO L82 PathProgramCache]: Analyzing trace with hash 488944726, now seen corresponding path program 10 times [2020-10-29 03:51:37,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:51:37,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243528862] [2020-10-29 03:51:37,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:51:37,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:51:37,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:37,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:38,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:38,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:38,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:38,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:39,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:39,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:41,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:42,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:42,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:51:42,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 03:51:42,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 03:51:42,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 03:51:42,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:51:42,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:51:42,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-29 03:51:42,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:51:42,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 03:51:42,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:51:43,294 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 56 [2020-10-29 03:51:43,522 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 48 [2020-10-29 03:51:44,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:51:44,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:51:44,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:44,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:51:44,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:51:44,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:51:44,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:51:44,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:51:44,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:51:44,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:51:44,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:51:44,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:51:44,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:51:44,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:51:44,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:51:44,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:44,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:51:44,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:51:44,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:51:44,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:51:44,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:51:44,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:51:44,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:51:44,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:51:44,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:51:44,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:51:44,765 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:51:44,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1243528862] [2020-10-29 03:51:44,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:51:44,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-29 03:51:44,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167226000] [2020-10-29 03:51:44,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-29 03:51:44,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:51:44,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-29 03:51:44,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=741, Unknown=0, NotChecked=0, Total=812 [2020-10-29 03:51:44,768 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 29 states. [2020-10-29 03:51:46,506 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2020-10-29 03:51:46,752 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2020-10-29 03:51:47,121 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 51 [2020-10-29 03:51:47,339 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 54 [2020-10-29 03:51:47,615 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2020-10-29 03:51:47,855 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 69 [2020-10-29 03:51:48,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:51:48,584 INFO L93 Difference]: Finished difference Result 138 states and 153 transitions. [2020-10-29 03:51:48,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-29 03:51:48,585 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 58 [2020-10-29 03:51:48,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:51:48,586 INFO L225 Difference]: With dead ends: 138 [2020-10-29 03:51:48,586 INFO L226 Difference]: Without dead ends: 101 [2020-10-29 03:51:48,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=192, Invalid=2064, Unknown=0, NotChecked=0, Total=2256 [2020-10-29 03:51:48,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-29 03:51:48,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 77. [2020-10-29 03:51:48,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-29 03:51:48,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2020-10-29 03:51:48,604 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 58 [2020-10-29 03:51:48,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:51:48,604 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2020-10-29 03:51:48,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-29 03:51:48,604 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2020-10-29 03:51:48,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 03:51:48,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:51:48,606 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:51:48,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 03:51:48,606 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:51:48,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:51:48,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1275728196, now seen corresponding path program 11 times [2020-10-29 03:51:48,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:51:48,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531689067] [2020-10-29 03:51:48,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:51:48,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:51:48,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:48,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:48,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:48,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:49,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:49,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:49,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:49,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:49,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:50,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:50,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:53,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:53,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:53,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:53,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:51:53,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 03:51:53,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 03:51:53,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 03:51:53,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:51:53,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:51:53,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 03:51:53,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:51:53,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 03:51:53,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:51:53,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:51:53,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:51:53,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:53,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:51:53,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:51:53,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:51:53,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 03:51:53,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:51:53,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:51:53,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:51:53,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:51:53,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:51:53,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:51:53,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:51:53,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:51:53,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:53,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:51:53,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:51:53,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:51:53,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:51:53,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:51:53,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:51:53,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:51:53,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:51:53,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:51:53,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:51:53,888 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 70 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:51:53,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531689067] [2020-10-29 03:51:53,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:51:53,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 03:51:53,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821821893] [2020-10-29 03:51:53,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 03:51:53,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:51:53,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 03:51:53,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-29 03:51:53,891 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand 18 states. [2020-10-29 03:51:54,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:51:54,625 INFO L93 Difference]: Finished difference Result 177 states and 190 transitions. [2020-10-29 03:51:54,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 03:51:54,626 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 61 [2020-10-29 03:51:54,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:51:54,627 INFO L225 Difference]: With dead ends: 177 [2020-10-29 03:51:54,627 INFO L226 Difference]: Without dead ends: 110 [2020-10-29 03:51:54,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2020-10-29 03:51:54,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-29 03:51:54,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 92. [2020-10-29 03:51:54,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-29 03:51:54,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2020-10-29 03:51:54,640 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 61 [2020-10-29 03:51:54,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:51:54,641 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2020-10-29 03:51:54,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 03:51:54,641 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2020-10-29 03:51:54,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 03:51:54,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:51:54,642 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:51:54,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 03:51:54,642 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:51:54,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:51:54,642 INFO L82 PathProgramCache]: Analyzing trace with hash 4916185, now seen corresponding path program 12 times [2020-10-29 03:51:54,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:51:54,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528338921] [2020-10-29 03:51:54,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:51:54,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:51:54,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:54,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:54,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:54,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:54,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:55,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:55,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:56,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:56,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:56,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:56,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:56,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:57,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:57,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:58,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:58,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:59,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:51:59,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 03:51:59,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-29 03:51:59,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 03:51:59,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:51:59,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:51:59,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 03:51:59,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:51:59,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 03:51:59,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:51:59,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:51:59,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:51:59,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:59,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:51:59,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:51:59,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:51:59,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:51:59,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:51:59,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:51:59,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:51:59,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:51:59,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:51:59,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:51:59,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:51:59,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:51:59,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:59,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:51:59,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:51:59,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:51:59,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:51:59,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:51:59,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:51:59,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:51:59,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:51:59,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:51:59,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:51:59,916 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 51 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:51:59,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528338921] [2020-10-29 03:51:59,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:51:59,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 03:51:59,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913679125] [2020-10-29 03:51:59,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 03:51:59,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:51:59,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 03:51:59,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-10-29 03:51:59,922 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand 18 states. [2020-10-29 03:52:00,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:52:00,598 INFO L93 Difference]: Finished difference Result 109 states and 117 transitions. [2020-10-29 03:52:00,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 03:52:00,599 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 61 [2020-10-29 03:52:00,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:52:00,601 INFO L225 Difference]: With dead ends: 109 [2020-10-29 03:52:00,601 INFO L226 Difference]: Without dead ends: 82 [2020-10-29 03:52:00,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=239, Invalid=753, Unknown=0, NotChecked=0, Total=992 [2020-10-29 03:52:00,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-29 03:52:00,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 75. [2020-10-29 03:52:00,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-29 03:52:00,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2020-10-29 03:52:00,617 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 61 [2020-10-29 03:52:00,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:52:00,618 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2020-10-29 03:52:00,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 03:52:00,618 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2020-10-29 03:52:00,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-29 03:52:00,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:52:00,624 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:52:00,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 03:52:00,625 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:52:00,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:52:00,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1530186841, now seen corresponding path program 13 times [2020-10-29 03:52:00,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:52:00,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360251371] [2020-10-29 03:52:00,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:52:00,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:52:00,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:01,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:01,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:01,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:02,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:02,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:03,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:03,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:04,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:05,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:52:05,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 03:52:05,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 03:52:05,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 03:52:05,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:52:05,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:52:05,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-29 03:52:05,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:52:05,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-29 03:52:05,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:52:06,884 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-29 03:52:07,053 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2020-10-29 03:52:07,225 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-10-29 03:52:07,380 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-10-29 03:52:07,556 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-10-29 03:52:07,730 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2020-10-29 03:52:07,894 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-10-29 03:52:08,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:52:08,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:52:08,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:08,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:52:08,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:52:08,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:52:08,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:52:08,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:52:08,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:52:08,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:52:08,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:52:08,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:52:08,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:52:08,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:52:08,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:52:08,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:08,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:52:08,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:52:08,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:52:08,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:52:08,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:52:08,702 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:52:08,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:52:08,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:52:08,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:52:08,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:52:08,736 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 20 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:52:08,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360251371] [2020-10-29 03:52:08,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:52:08,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-29 03:52:08,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370856262] [2020-10-29 03:52:08,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-29 03:52:08,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:52:08,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-29 03:52:08,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1173, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 03:52:08,739 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand 37 states. [2020-10-29 03:52:10,715 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 96 [2020-10-29 03:52:11,298 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-10-29 03:52:11,633 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 95 [2020-10-29 03:52:11,926 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 99 [2020-10-29 03:52:12,397 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 99 [2020-10-29 03:52:12,680 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 86 [2020-10-29 03:52:12,963 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 88 [2020-10-29 03:52:13,332 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 91 [2020-10-29 03:52:13,609 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 93 [2020-10-29 03:52:13,892 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 96 [2020-10-29 03:52:14,206 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 86 [2020-10-29 03:52:14,448 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 89 [2020-10-29 03:52:14,719 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 89 [2020-10-29 03:52:15,128 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 90 [2020-10-29 03:52:15,425 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2020-10-29 03:52:15,696 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 89 [2020-10-29 03:52:16,146 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 92 [2020-10-29 03:52:16,463 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 95 [2020-10-29 03:52:16,915 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 95 [2020-10-29 03:52:17,382 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 91 [2020-10-29 03:52:17,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:52:17,645 INFO L93 Difference]: Finished difference Result 130 states and 143 transitions. [2020-10-29 03:52:17,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-29 03:52:17,646 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 64 [2020-10-29 03:52:17,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:52:17,648 INFO L225 Difference]: With dead ends: 130 [2020-10-29 03:52:17,648 INFO L226 Difference]: Without dead ends: 100 [2020-10-29 03:52:17,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1822 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=809, Invalid=5353, Unknown=0, NotChecked=0, Total=6162 [2020-10-29 03:52:17,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-29 03:52:17,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 90. [2020-10-29 03:52:17,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-29 03:52:17,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 101 transitions. [2020-10-29 03:52:17,660 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 101 transitions. Word has length 64 [2020-10-29 03:52:17,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:52:17,660 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 101 transitions. [2020-10-29 03:52:17,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-29 03:52:17,661 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 101 transitions. [2020-10-29 03:52:17,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 03:52:17,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:52:17,662 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:52:17,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 03:52:17,662 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:52:17,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:52:17,662 INFO L82 PathProgramCache]: Analyzing trace with hash -403427940, now seen corresponding path program 14 times [2020-10-29 03:52:17,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:52:17,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332678187] [2020-10-29 03:52:17,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:52:17,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:52:17,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:18,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:18,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:18,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:18,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:19,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:19,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:19,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:19,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:19,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:19,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:19,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:19,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:20,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:20,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:20,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:20,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:20,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:20,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:21,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:21,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:21,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:21,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:22,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:52:22,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 03:52:22,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-29 03:52:22,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 03:52:22,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:52:22,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:52:22,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 03:52:22,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-29 03:52:22,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 03:52:22,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:52:23,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:52:23,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:52:23,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:23,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:52:23,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:52:23,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:52:23,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:52:23,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:52:23,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:52:23,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:52:23,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:52:23,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:52:23,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:52:23,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:52:23,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:52:23,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:23,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:52:23,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:52:23,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:52:23,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:52:23,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:52:23,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:52:23,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:52:23,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:52:23,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:52:23,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:52:23,323 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 33 proven. 127 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 03:52:23,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332678187] [2020-10-29 03:52:23,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:52:23,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 03:52:23,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122787570] [2020-10-29 03:52:23,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 03:52:23,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:52:23,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 03:52:23,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2020-10-29 03:52:23,328 INFO L87 Difference]: Start difference. First operand 90 states and 101 transitions. Second operand 22 states. [2020-10-29 03:52:25,400 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-10-29 03:52:25,633 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-10-29 03:52:25,764 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-10-29 03:52:25,896 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-10-29 03:52:26,167 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-29 03:52:26,558 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-10-29 03:52:28,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:52:28,577 INFO L93 Difference]: Finished difference Result 161 states and 186 transitions. [2020-10-29 03:52:28,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-29 03:52:28,578 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2020-10-29 03:52:28,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:52:28,579 INFO L225 Difference]: With dead ends: 161 [2020-10-29 03:52:28,580 INFO L226 Difference]: Without dead ends: 154 [2020-10-29 03:52:28,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1721 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=993, Invalid=5013, Unknown=0, NotChecked=0, Total=6006 [2020-10-29 03:52:28,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-29 03:52:28,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-10-29 03:52:28,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-29 03:52:28,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 144 transitions. [2020-10-29 03:52:28,603 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 144 transitions. Word has length 67 [2020-10-29 03:52:28,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:52:28,603 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 144 transitions. [2020-10-29 03:52:28,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 03:52:28,603 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 144 transitions. [2020-10-29 03:52:28,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 03:52:28,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:52:28,604 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:52:28,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 03:52:28,604 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:52:28,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:52:28,605 INFO L82 PathProgramCache]: Analyzing trace with hash -102258762, now seen corresponding path program 15 times [2020-10-29 03:52:28,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:52:28,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449182145] [2020-10-29 03:52:28,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:52:28,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:52:28,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:29,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:29,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:30,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:30,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:31,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:31,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:32,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:33,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:33,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:52:33,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 03:52:33,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 03:52:33,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 03:52:33,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:52:33,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:52:33,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-29 03:52:33,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:52:33,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-29 03:52:33,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:52:36,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:52:36,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:52:36,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:36,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:52:36,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:52:36,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:52:36,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:52:36,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:52:36,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:52:36,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:52:36,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:52:36,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:52:36,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:52:36,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:52:36,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:52:36,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:36,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:52:36,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:52:36,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:52:36,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:52:36,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:52:36,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:52:36,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:52:36,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:52:36,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:52:36,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:52:37,015 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:52:37,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449182145] [2020-10-29 03:52:37,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:52:37,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-29 03:52:37,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143729665] [2020-10-29 03:52:37,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-29 03:52:37,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:52:37,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-29 03:52:37,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1215, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 03:52:37,018 INFO L87 Difference]: Start difference. First operand 119 states and 144 transitions. Second operand 37 states. [2020-10-29 03:52:38,635 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2020-10-29 03:52:38,890 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2020-10-29 03:52:39,428 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2020-10-29 03:52:39,798 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-10-29 03:52:40,256 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2020-10-29 03:52:40,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:52:40,867 INFO L93 Difference]: Finished difference Result 210 states and 253 transitions. [2020-10-29 03:52:40,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-29 03:52:40,868 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 70 [2020-10-29 03:52:40,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:52:40,870 INFO L225 Difference]: With dead ends: 210 [2020-10-29 03:52:40,870 INFO L226 Difference]: Without dead ends: 120 [2020-10-29 03:52:40,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=237, Invalid=2313, Unknown=0, NotChecked=0, Total=2550 [2020-10-29 03:52:40,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-29 03:52:40,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 75. [2020-10-29 03:52:40,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-29 03:52:40,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-10-29 03:52:40,882 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 70 [2020-10-29 03:52:40,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:52:40,882 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-10-29 03:52:40,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-29 03:52:40,882 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-10-29 03:52:40,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 03:52:40,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:52:40,883 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:52:40,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 03:52:40,883 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:52:40,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:52:40,884 INFO L82 PathProgramCache]: Analyzing trace with hash -157958308, now seen corresponding path program 16 times [2020-10-29 03:52:40,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:52:40,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047057448] [2020-10-29 03:52:40,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:52:40,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:52:40,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:40,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:41,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:41,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:41,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:41,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:41,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:41,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:42,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:42,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:43,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:43,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:43,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:44,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:44,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:45,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:45,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:45,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:45,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:45,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:45,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:52:45,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-29 03:52:45,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-29 03:52:45,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 03:52:45,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:52:45,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:52:45,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 03:52:45,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-29 03:52:45,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 03:52:45,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:52:46,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:52:46,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:52:46,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:46,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:52:46,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:52:46,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:52:46,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:52:46,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:52:46,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:52:46,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:52:46,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:52:46,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:52:46,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:52:46,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:52:46,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:52:46,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:46,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:52:46,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:52:46,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:52:46,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:52:46,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:52:46,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:52:46,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:52:46,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:52:46,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:52:46,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:52:46,498 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 51 proven. 132 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-29 03:52:46,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047057448] [2020-10-29 03:52:46,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:52:46,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 03:52:46,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479024231] [2020-10-29 03:52:46,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 03:52:46,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:52:46,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 03:52:46,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-10-29 03:52:46,500 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 21 states. [2020-10-29 03:52:47,099 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2020-10-29 03:52:47,363 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-10-29 03:52:47,716 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2020-10-29 03:52:47,844 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-10-29 03:52:48,128 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2020-10-29 03:52:48,286 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2020-10-29 03:52:48,426 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2020-10-29 03:52:49,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:52:49,625 INFO L93 Difference]: Finished difference Result 151 states and 166 transitions. [2020-10-29 03:52:49,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-29 03:52:49,626 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 73 [2020-10-29 03:52:49,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:52:49,627 INFO L225 Difference]: With dead ends: 151 [2020-10-29 03:52:49,628 INFO L226 Difference]: Without dead ends: 144 [2020-10-29 03:52:49,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=439, Invalid=2531, Unknown=0, NotChecked=0, Total=2970 [2020-10-29 03:52:49,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-29 03:52:49,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 97. [2020-10-29 03:52:49,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-29 03:52:49,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2020-10-29 03:52:49,643 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 73 [2020-10-29 03:52:49,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:52:49,643 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2020-10-29 03:52:49,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 03:52:49,643 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2020-10-29 03:52:49,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 03:52:49,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:52:49,644 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:52:49,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 03:52:49,644 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:52:49,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:52:49,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1645756938, now seen corresponding path program 17 times [2020-10-29 03:52:49,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:52:49,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072052537] [2020-10-29 03:52:49,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:52:49,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:52:49,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:49,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:49,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:49,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:50,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:50,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:50,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:50,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:50,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:50,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:51,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:51,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:52,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:54,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:52:54,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 03:52:54,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 03:52:54,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-29 03:52:54,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:52:54,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:52:54,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 03:52:54,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-29 03:52:54,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 03:52:54,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:52:55,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:52:55,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:52:55,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:55,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:52:55,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:52:55,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:52:55,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:52:55,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:52:55,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:52:55,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:52:55,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:52:55,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:52:55,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:52:55,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:52:55,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:52:55,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:55,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:52:55,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:52:55,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:52:55,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:52:55,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:52:55,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:52:55,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:52:55,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:52:55,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:52:55,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:52:55,184 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 51 proven. 142 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-10-29 03:52:55,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072052537] [2020-10-29 03:52:55,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:52:55,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 03:52:55,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193088953] [2020-10-29 03:52:55,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 03:52:55,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:52:55,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 03:52:55,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:52:55,187 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand 17 states. [2020-10-29 03:52:56,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:52:56,467 INFO L93 Difference]: Finished difference Result 236 states and 262 transitions. [2020-10-29 03:52:56,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 03:52:56,472 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2020-10-29 03:52:56,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:52:56,474 INFO L225 Difference]: With dead ends: 236 [2020-10-29 03:52:56,474 INFO L226 Difference]: Without dead ends: 175 [2020-10-29 03:52:56,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2020-10-29 03:52:56,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-29 03:52:56,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 127. [2020-10-29 03:52:56,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-29 03:52:56,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 132 transitions. [2020-10-29 03:52:56,504 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 132 transitions. Word has length 76 [2020-10-29 03:52:56,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:52:56,504 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 132 transitions. [2020-10-29 03:52:56,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 03:52:56,504 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 132 transitions. [2020-10-29 03:52:56,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 03:52:56,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:52:56,505 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:52:56,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 03:52:56,506 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:52:56,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:52:56,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1361502267, now seen corresponding path program 18 times [2020-10-29 03:52:56,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:52:56,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536015587] [2020-10-29 03:52:56,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:52:56,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:52:56,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:57,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:57,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:58,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:58,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:58,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:59,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:59,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:59,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:01,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:01,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:01,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 03:53:01,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 03:53:01,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-29 03:53:01,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:01,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:01,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-29 03:53:01,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:53:01,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-29 03:53:01,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:53:04,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:53:04,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:04,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:04,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:04,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:53:04,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:53:04,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:53:04,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:04,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:04,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:53:04,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:53:04,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:53:04,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:53:04,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:53:04,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:04,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:04,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:04,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:53:04,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:53:04,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:53:04,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:04,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:04,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:53:04,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:53:04,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:53:04,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:53:04,546 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 6 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:53:04,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536015587] [2020-10-29 03:53:04,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:53:04,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-29 03:53:04,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435638179] [2020-10-29 03:53:04,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-29 03:53:04,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:53:04,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-29 03:53:04,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1536, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 03:53:04,549 INFO L87 Difference]: Start difference. First operand 127 states and 132 transitions. Second operand 41 states. [2020-10-29 03:53:07,978 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2020-10-29 03:53:10,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:53:10,226 INFO L93 Difference]: Finished difference Result 187 states and 195 transitions. [2020-10-29 03:53:10,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-29 03:53:10,230 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 76 [2020-10-29 03:53:10,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:53:10,231 INFO L225 Difference]: With dead ends: 187 [2020-10-29 03:53:10,231 INFO L226 Difference]: Without dead ends: 180 [2020-10-29 03:53:10,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=224, Invalid=3808, Unknown=0, NotChecked=0, Total=4032 [2020-10-29 03:53:10,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-29 03:53:10,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 133. [2020-10-29 03:53:10,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-29 03:53:10,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 140 transitions. [2020-10-29 03:53:10,259 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 140 transitions. Word has length 76 [2020-10-29 03:53:10,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:53:10,260 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 140 transitions. [2020-10-29 03:53:10,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-29 03:53:10,260 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 140 transitions. [2020-10-29 03:53:10,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-29 03:53:10,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:53:10,261 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:53:10,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 03:53:10,261 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:53:10,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:53:10,262 INFO L82 PathProgramCache]: Analyzing trace with hash -56099657, now seen corresponding path program 19 times [2020-10-29 03:53:10,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:53:10,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724316094] [2020-10-29 03:53:10,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:53:10,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:10,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:10,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:10,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:10,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:10,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:11,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:11,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:11,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:12,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:12,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:12,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:12,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:14,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:14,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:15,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:15,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:15,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-29 03:53:15,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 03:53:15,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 03:53:15,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:15,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:15,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-29 03:53:15,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:53:15,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-29 03:53:15,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:53:15,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:53:15,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:15,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:15,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:15,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:53:15,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:53:15,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:53:15,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:15,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:15,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:53:15,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:53:15,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:53:15,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:53:15,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:53:15,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:15,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:15,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:15,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:53:15,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:53:15,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:53:15,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:15,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:15,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:53:15,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:53:15,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:53:15,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:53:15,704 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 145 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:53:15,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724316094] [2020-10-29 03:53:15,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:53:15,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 03:53:15,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231570743] [2020-10-29 03:53:15,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 03:53:15,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:53:15,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 03:53:15,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2020-10-29 03:53:15,706 INFO L87 Difference]: Start difference. First operand 133 states and 140 transitions. Second operand 24 states. [2020-10-29 03:53:16,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:53:16,737 INFO L93 Difference]: Finished difference Result 252 states and 260 transitions. [2020-10-29 03:53:16,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-29 03:53:16,739 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 79 [2020-10-29 03:53:16,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:53:16,740 INFO L225 Difference]: With dead ends: 252 [2020-10-29 03:53:16,740 INFO L226 Difference]: Without dead ends: 175 [2020-10-29 03:53:16,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=432, Invalid=1460, Unknown=0, NotChecked=0, Total=1892 [2020-10-29 03:53:16,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-29 03:53:16,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 133. [2020-10-29 03:53:16,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-29 03:53:16,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 138 transitions. [2020-10-29 03:53:16,766 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 138 transitions. Word has length 79 [2020-10-29 03:53:16,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:53:16,766 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 138 transitions. [2020-10-29 03:53:16,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-29 03:53:16,766 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 138 transitions. [2020-10-29 03:53:16,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-29 03:53:16,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:53:16,767 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:53:16,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 03:53:16,767 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:53:16,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:53:16,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1921800250, now seen corresponding path program 20 times [2020-10-29 03:53:16,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:53:16,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193862997] [2020-10-29 03:53:16,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:53:16,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:16,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:16,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:16,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:16,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:17,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:17,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:18,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:19,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:19,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:19,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:20,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:21,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:21,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:21,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:21,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-29 03:53:21,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 03:53:21,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 03:53:21,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:21,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:21,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 03:53:21,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-29 03:53:21,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 03:53:21,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:53:22,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:53:22,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:22,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:22,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:22,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:53:22,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:53:22,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 03:53:22,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:22,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:22,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:53:22,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:53:22,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:53:22,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:53:22,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:53:22,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:22,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:22,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:22,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:53:22,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:53:22,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:53:22,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:22,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:22,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:53:22,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:53:22,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:53:22,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:53:22,509 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 79 proven. 143 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-29 03:53:22,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193862997] [2020-10-29 03:53:22,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:53:22,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 03:53:22,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564472870] [2020-10-29 03:53:22,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 03:53:22,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:53:22,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 03:53:22,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2020-10-29 03:53:22,511 INFO L87 Difference]: Start difference. First operand 133 states and 138 transitions. Second operand 22 states. [2020-10-29 03:53:23,968 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-29 03:53:24,351 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-29 03:53:26,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:53:26,789 INFO L93 Difference]: Finished difference Result 205 states and 210 transitions. [2020-10-29 03:53:26,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-29 03:53:26,790 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 79 [2020-10-29 03:53:26,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:53:26,792 INFO L225 Difference]: With dead ends: 205 [2020-10-29 03:53:26,792 INFO L226 Difference]: Without dead ends: 198 [2020-10-29 03:53:26,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=682, Invalid=4010, Unknown=0, NotChecked=0, Total=4692 [2020-10-29 03:53:26,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-29 03:53:26,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 133. [2020-10-29 03:53:26,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-29 03:53:26,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 138 transitions. [2020-10-29 03:53:26,817 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 138 transitions. Word has length 79 [2020-10-29 03:53:26,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:53:26,818 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 138 transitions. [2020-10-29 03:53:26,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 03:53:26,818 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 138 transitions. [2020-10-29 03:53:26,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-29 03:53:26,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:53:26,818 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:53:26,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 03:53:26,819 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:53:26,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:53:26,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1538199640, now seen corresponding path program 21 times [2020-10-29 03:53:26,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:53:26,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791404904] [2020-10-29 03:53:26,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:53:26,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:26,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:27,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:28,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:29,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:30,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:30,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:31,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:32,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:32,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 03:53:32,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 03:53:32,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5516 [2020-10-29 03:53:32,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:32,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:32,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-29 03:53:32,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:53:32,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-29 03:53:32,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:53:35,347 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 23 [2020-10-29 03:53:35,912 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 38 [2020-10-29 03:53:36,075 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 38 [2020-10-29 03:53:36,372 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 40 [2020-10-29 03:53:36,692 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 42 [2020-10-29 03:53:37,080 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 52 [2020-10-29 03:53:37,488 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 48 [2020-10-29 03:53:37,993 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 56 [2020-10-29 03:53:38,457 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 58 [2020-10-29 03:53:39,543 WARN L193 SmtUtils]: Spent 939.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 54 [2020-10-29 03:53:40,559 WARN L193 SmtUtils]: Spent 813.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 56 [2020-10-29 03:53:41,843 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 219 DAG size of output: 57 [2020-10-29 03:53:42,979 WARN L193 SmtUtils]: Spent 963.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 57 [2020-10-29 03:53:44,348 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 224 DAG size of output: 63 [2020-10-29 03:53:46,277 WARN L193 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 396 DAG size of output: 72 [2020-10-29 03:53:49,121 WARN L193 SmtUtils]: Spent 2.34 s on a formula simplification. DAG size of input: 351 DAG size of output: 87 [2020-10-29 03:53:51,653 WARN L193 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 379 DAG size of output: 86 [2020-10-29 03:53:54,503 WARN L193 SmtUtils]: Spent 2.54 s on a formula simplification. DAG size of input: 463 DAG size of output: 106 [2020-10-29 03:53:57,724 WARN L193 SmtUtils]: Spent 2.66 s on a formula simplification. DAG size of input: 752 DAG size of output: 84 [2020-10-29 03:54:01,995 WARN L193 SmtUtils]: Spent 3.96 s on a formula simplification. DAG size of input: 373 DAG size of output: 146 [2020-10-29 03:54:03,563 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 186 DAG size of output: 91 [2020-10-29 03:54:04,939 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 180 DAG size of output: 97 [2020-10-29 03:54:05,917 WARN L193 SmtUtils]: Spent 789.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 89 [2020-10-29 03:54:07,071 WARN L193 SmtUtils]: Spent 956.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 91 [2020-10-29 03:54:07,556 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2020-10-29 03:54:07,901 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 58 [2020-10-29 03:54:08,239 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-10-29 03:54:09,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:54:09,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:09,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:09,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:09,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:54:09,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:09,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:54:09,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:09,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:09,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:09,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:09,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:09,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:09,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:54:09,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:54:09,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:54:09,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:54:09,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:54:09,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:54:09,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:54:09,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:54:09,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:54:09,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:54:09,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:54:09,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:54:09,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:54:09,876 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 2 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:54:09,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791404904] [2020-10-29 03:54:09,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:54:09,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-29 03:54:09,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214684153] [2020-10-29 03:54:09,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-29 03:54:09,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:54:09,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-29 03:54:09,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2077, Unknown=0, NotChecked=0, Total=2256 [2020-10-29 03:54:09,879 INFO L87 Difference]: Start difference. First operand 133 states and 138 transitions. Second operand 48 states.