/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_partition_original_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:30:24,567 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:30:24,570 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:30:24,612 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:30:24,612 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:30:24,614 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:30:24,616 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:30:24,618 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:30:24,621 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:30:24,622 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:30:24,623 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:30:24,625 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:30:24,626 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:30:24,627 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:30:24,629 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:30:24,630 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:30:24,631 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:30:24,643 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:30:24,645 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:30:24,649 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:30:24,654 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:30:24,658 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:30:24,659 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:30:24,661 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:30:24,664 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:30:24,665 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:30:24,665 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:30:24,666 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:30:24,667 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:30:24,668 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:30:24,669 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:30:24,669 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:30:24,670 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:30:24,671 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:30:24,673 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:30:24,673 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:30:24,674 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:30:24,674 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:30:24,675 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:30:24,676 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:30:24,677 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:30:24,678 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 14:30:24,705 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:30:24,706 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:30:24,708 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:30:24,708 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:30:24,708 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:30:24,709 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:30:24,709 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:30:24,709 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:30:24,709 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:30:24,709 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:30:24,710 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:30:24,711 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:30:24,711 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:30:24,711 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:30:24,712 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:30:24,712 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:30:24,712 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:30:24,713 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:30:24,713 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:30:24,713 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:30:24,714 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:30:24,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:30:24,715 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:30:24,715 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:30:24,715 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:30:24,715 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:30:24,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:30:24,716 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:30:24,717 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:30:24,717 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:30:25,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:30:25,133 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:30:25,136 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:30:25,138 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:30:25,139 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:30:25,140 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_partition_original_ground.i [2020-10-27 14:30:25,217 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0be6a7d7a/ede71a22662b4e23ad0090e44251ecec/FLAG392854231 [2020-10-27 14:30:25,876 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:30:25,877 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_partition_original_ground.i [2020-10-27 14:30:25,886 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0be6a7d7a/ede71a22662b4e23ad0090e44251ecec/FLAG392854231 [2020-10-27 14:30:26,195 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0be6a7d7a/ede71a22662b4e23ad0090e44251ecec [2020-10-27 14:30:26,198 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:30:26,207 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:30:26,209 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:30:26,209 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:30:26,213 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:30:26,214 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:30:26" (1/1) ... [2020-10-27 14:30:26,218 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41395c99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:26, skipping insertion in model container [2020-10-27 14:30:26,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:30:26" (1/1) ... [2020-10-27 14:30:26,227 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:30:26,246 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:30:26,475 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:30:26,485 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:30:26,511 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:30:26,529 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:30:26,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:26 WrapperNode [2020-10-27 14:30:26,530 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:30:26,531 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:30:26,531 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:30:26,531 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:30:26,546 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:26" (1/1) ... [2020-10-27 14:30:26,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:26" (1/1) ... [2020-10-27 14:30:26,555 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:26" (1/1) ... [2020-10-27 14:30:26,556 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:26" (1/1) ... [2020-10-27 14:30:26,565 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:26" (1/1) ... [2020-10-27 14:30:26,571 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:26" (1/1) ... [2020-10-27 14:30:26,572 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:26" (1/1) ... [2020-10-27 14:30:26,575 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:30:26,577 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:30:26,577 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:30:26,577 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:30:26,578 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:26" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:30:26,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:30:26,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:30:26,663 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:30:26,663 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:30:26,663 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:30:26,664 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:30:26,664 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:30:26,664 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 14:30:26,664 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 14:30:26,664 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:30:26,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:30:26,664 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:30:26,665 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:30:26,665 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:30:26,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:30:26,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:30:26,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:30:26,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:30:26,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:30:26,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:30:27,219 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:30:27,220 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-27 14:30:27,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:30:27 BoogieIcfgContainer [2020-10-27 14:30:27,222 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:30:27,224 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:30:27,224 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:30:27,228 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:30:27,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:30:26" (1/3) ... [2020-10-27 14:30:27,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a911931 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:30:27, skipping insertion in model container [2020-10-27 14:30:27,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:26" (2/3) ... [2020-10-27 14:30:27,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a911931 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:30:27, skipping insertion in model container [2020-10-27 14:30:27,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:30:27" (3/3) ... [2020-10-27 14:30:27,232 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_partition_original_ground.i [2020-10-27 14:30:27,275 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:30:27,281 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:30:27,297 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:30:27,328 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:30:27,328 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:30:27,328 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:30:27,328 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:30:27,328 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:30:27,329 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:30:27,329 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:30:27,329 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:30:27,349 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-27 14:30:27,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 14:30:27,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:27,357 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:27,357 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:27,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:27,365 INFO L82 PathProgramCache]: Analyzing trace with hash 30659017, now seen corresponding path program 1 times [2020-10-27 14:30:27,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:27,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650938949] [2020-10-27 14:30:27,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:27,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:27,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:27,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:27,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:27,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:27,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 14:30:27,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:30:27,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 405 [2020-10-27 14:30:27,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:27,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:27,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:30:27,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:27,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:30:28,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:28,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:28,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:28,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:28,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:28,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 14:30:28,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:28,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:28,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:28,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:28,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:28,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:30:28,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650938949] [2020-10-27 14:30:28,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:30:28,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:30:28,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116445939] [2020-10-27 14:30:28,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:30:28,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:28,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:30:28,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:30:28,132 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-10-27 14:30:28,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:28,296 INFO L93 Difference]: Finished difference Result 63 states and 86 transitions. [2020-10-27 14:30:28,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:30:28,299 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-27 14:30:28,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:28,311 INFO L225 Difference]: With dead ends: 63 [2020-10-27 14:30:28,312 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 14:30:28,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:30:28,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 14:30:28,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-27 14:30:28,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 14:30:28,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-10-27 14:30:28,360 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 16 [2020-10-27 14:30:28,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:28,361 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-10-27 14:30:28,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:30:28,361 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-10-27 14:30:28,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 14:30:28,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:28,363 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:28,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:30:28,364 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:28,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:28,365 INFO L82 PathProgramCache]: Analyzing trace with hash -383097340, now seen corresponding path program 1 times [2020-10-27 14:30:28,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:28,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [267519386] [2020-10-27 14:30:28,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:28,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:28,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:28,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:28,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:28,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:28,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 14:30:28,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:30:28,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 215 [2020-10-27 14:30:28,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:28,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:30:28,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:30:28,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 14:30:28,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:28,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:28,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:28,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:28,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:28,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:28,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:28,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 14:30:28,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:28,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:28,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:28,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:28,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:30:28,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:30:28,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [267519386] [2020-10-27 14:30:28,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:30:28,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 14:30:28,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769918977] [2020-10-27 14:30:28,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:30:28,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:28,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:30:28,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:30:28,809 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 5 states. [2020-10-27 14:30:29,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:29,029 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2020-10-27 14:30:29,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:30:29,030 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-27 14:30:29,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:29,032 INFO L225 Difference]: With dead ends: 60 [2020-10-27 14:30:29,032 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 14:30:29,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:30:29,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 14:30:29,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-27 14:30:29,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 14:30:29,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-10-27 14:30:29,046 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 16 [2020-10-27 14:30:29,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:29,046 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-10-27 14:30:29,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:30:29,047 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-10-27 14:30:29,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 14:30:29,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:29,048 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:29,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:30:29,048 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:29,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:29,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1248111336, now seen corresponding path program 1 times [2020-10-27 14:30:29,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:29,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549843680] [2020-10-27 14:30:29,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:29,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:29,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:29,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:29,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:29,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:29,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 14:30:29,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:30:29,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-27 14:30:29,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:29,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:30:29,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:30:29,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:30:29,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:30:29,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:29,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:29,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:29,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:29,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:29,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:29,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 14:30:29,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:29,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:29,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:29,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:29,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:29,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:30:29,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549843680] [2020-10-27 14:30:29,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:30:29,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 14:30:29,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811424876] [2020-10-27 14:30:29,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:30:29,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:29,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:30:29,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:30:29,376 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 5 states. [2020-10-27 14:30:29,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:29,526 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2020-10-27 14:30:29,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:30:29,527 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-27 14:30:29,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:29,529 INFO L225 Difference]: With dead ends: 60 [2020-10-27 14:30:29,529 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 14:30:29,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:30:29,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 14:30:29,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-27 14:30:29,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 14:30:29,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2020-10-27 14:30:29,540 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 18 [2020-10-27 14:30:29,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:29,541 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2020-10-27 14:30:29,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:30:29,541 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2020-10-27 14:30:29,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 14:30:29,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:29,542 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:29,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:30:29,543 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:29,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:29,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1370893134, now seen corresponding path program 1 times [2020-10-27 14:30:29,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:29,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373847931] [2020-10-27 14:30:29,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:29,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:29,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:29,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:29,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:30,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:30,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 14:30:30,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:30:30,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 541 [2020-10-27 14:30:30,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:30,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:30:30,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:30:30,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:30:30,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:30,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:30,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:30,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:30,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:30,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:30,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 14:30:30,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:30,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:30,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:30,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:30,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:30:30,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:30:30,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373847931] [2020-10-27 14:30:30,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:30,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 14:30:30,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004049634] [2020-10-27 14:30:30,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:30:30,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:30,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:30:30,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:30:30,207 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand 5 states. [2020-10-27 14:30:30,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:30,403 INFO L93 Difference]: Finished difference Result 73 states and 89 transitions. [2020-10-27 14:30:30,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:30:30,406 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-27 14:30:30,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:30,407 INFO L225 Difference]: With dead ends: 73 [2020-10-27 14:30:30,407 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 14:30:30,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:30:30,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 14:30:30,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2020-10-27 14:30:30,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 14:30:30,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2020-10-27 14:30:30,430 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 19 [2020-10-27 14:30:30,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:30,431 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2020-10-27 14:30:30,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:30:30,431 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2020-10-27 14:30:30,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 14:30:30,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:30,434 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:30,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:30:30,434 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:30,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:30,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1928980932, now seen corresponding path program 2 times [2020-10-27 14:30:30,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:30,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228754331] [2020-10-27 14:30:30,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:30,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:30,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:30,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:30,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:31,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:31,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 14:30:31,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:30:31,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 802 [2020-10-27 14:30:31,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:31,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:30:31,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:30:31,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 14:30:31,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:31,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:31,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:31,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:31,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:31,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:31,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:31,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 14:30:31,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:31,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:31,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:31,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:31,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:31,380 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:30:31,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228754331] [2020-10-27 14:30:31,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:31,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:30:31,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071072539] [2020-10-27 14:30:31,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:30:31,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:31,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:30:31,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:30:31,384 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand 6 states. [2020-10-27 14:30:31,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:31,591 INFO L93 Difference]: Finished difference Result 87 states and 109 transitions. [2020-10-27 14:30:31,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:30:31,592 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-27 14:30:31,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:31,593 INFO L225 Difference]: With dead ends: 87 [2020-10-27 14:30:31,594 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 14:30:31,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:30:31,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 14:30:31,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2020-10-27 14:30:31,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 14:30:31,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2020-10-27 14:30:31,616 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 22 [2020-10-27 14:30:31,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:31,617 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2020-10-27 14:30:31,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:30:31,617 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2020-10-27 14:30:31,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 14:30:31,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:31,625 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:31,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:30:31,625 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:31,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:31,626 INFO L82 PathProgramCache]: Analyzing trace with hash 2104168334, now seen corresponding path program 3 times [2020-10-27 14:30:31,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:31,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155455026] [2020-10-27 14:30:31,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:31,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:31,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:31,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:31,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:32,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:32,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 14:30:32,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:30:32,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 825 [2020-10-27 14:30:32,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:32,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:30:32,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:30:32,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 14:30:32,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:32,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:32,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:32,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:32,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:32,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:32,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:32,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:30:32,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:32,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:32,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:32,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:32,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:32,767 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:30:32,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155455026] [2020-10-27 14:30:32,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:32,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:30:32,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650245092] [2020-10-27 14:30:32,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:30:32,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:32,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:30:32,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:30:32,770 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand 12 states. [2020-10-27 14:30:33,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:33,451 INFO L93 Difference]: Finished difference Result 97 states and 119 transitions. [2020-10-27 14:30:33,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:30:33,452 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-10-27 14:30:33,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:33,454 INFO L225 Difference]: With dead ends: 97 [2020-10-27 14:30:33,454 INFO L226 Difference]: Without dead ends: 93 [2020-10-27 14:30:33,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:30:33,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-27 14:30:33,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 70. [2020-10-27 14:30:33,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-27 14:30:33,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 87 transitions. [2020-10-27 14:30:33,479 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 87 transitions. Word has length 25 [2020-10-27 14:30:33,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:33,483 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 87 transitions. [2020-10-27 14:30:33,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:30:33,484 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 87 transitions. [2020-10-27 14:30:33,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 14:30:33,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:33,485 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:33,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:30:33,485 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:33,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:33,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1489734384, now seen corresponding path program 1 times [2020-10-27 14:30:33,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:33,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096878985] [2020-10-27 14:30:33,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:33,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:33,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:33,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:33,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:34,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:34,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 14:30:34,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:30:34,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 762 [2020-10-27 14:30:34,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:34,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:30:34,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:30:34,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 14:30:34,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:34,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:34,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:34,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:34,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:34,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:34,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:34,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:30:34,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:34,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:34,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:34,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:34,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:34,469 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:30:34,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096878985] [2020-10-27 14:30:34,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:34,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:30:34,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576116716] [2020-10-27 14:30:34,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:30:34,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:34,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:30:34,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:30:34,473 INFO L87 Difference]: Start difference. First operand 70 states and 87 transitions. Second operand 12 states. [2020-10-27 14:30:35,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:35,265 INFO L93 Difference]: Finished difference Result 144 states and 185 transitions. [2020-10-27 14:30:35,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:30:35,266 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-10-27 14:30:35,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:35,273 INFO L225 Difference]: With dead ends: 144 [2020-10-27 14:30:35,275 INFO L226 Difference]: Without dead ends: 140 [2020-10-27 14:30:35,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:30:35,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-27 14:30:35,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 90. [2020-10-27 14:30:35,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-27 14:30:35,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 117 transitions. [2020-10-27 14:30:35,316 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 117 transitions. Word has length 25 [2020-10-27 14:30:35,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:35,316 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 117 transitions. [2020-10-27 14:30:35,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:30:35,316 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 117 transitions. [2020-10-27 14:30:35,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 14:30:35,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:35,318 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:35,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:30:35,321 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:35,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:35,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1373165836, now seen corresponding path program 1 times [2020-10-27 14:30:35,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:35,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732960162] [2020-10-27 14:30:35,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:35,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:35,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:35,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:35,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:35,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:37,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:37,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 14:30:37,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:30:37,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1943 [2020-10-27 14:30:37,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:37,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:30:37,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:30:37,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:30:37,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:37,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:37,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:37,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:37,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:37,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:37,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:37,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:30:37,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:37,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:37,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:37,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:37,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:37,362 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:30:37,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732960162] [2020-10-27 14:30:37,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:30:37,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 14:30:37,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699039317] [2020-10-27 14:30:37,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:30:37,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:37,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:30:37,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:30:37,366 INFO L87 Difference]: Start difference. First operand 90 states and 117 transitions. Second operand 7 states. [2020-10-27 14:30:37,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:37,564 INFO L93 Difference]: Finished difference Result 130 states and 166 transitions. [2020-10-27 14:30:37,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:30:37,564 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-27 14:30:37,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:37,566 INFO L225 Difference]: With dead ends: 130 [2020-10-27 14:30:37,568 INFO L226 Difference]: Without dead ends: 117 [2020-10-27 14:30:37,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:30:37,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-27 14:30:37,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 93. [2020-10-27 14:30:37,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-27 14:30:37,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 119 transitions. [2020-10-27 14:30:37,595 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 119 transitions. Word has length 27 [2020-10-27 14:30:37,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:37,595 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 119 transitions. [2020-10-27 14:30:37,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:30:37,596 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 119 transitions. [2020-10-27 14:30:37,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 14:30:37,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:37,601 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:37,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:30:37,601 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:37,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:37,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1900733106, now seen corresponding path program 2 times [2020-10-27 14:30:37,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:37,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662691764] [2020-10-27 14:30:37,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:37,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:37,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:37,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:37,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:37,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:39,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:39,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 14:30:39,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:30:39,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1651 [2020-10-27 14:30:39,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:39,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:30:39,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:30:39,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:30:39,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:39,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:39,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:39,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:39,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:39,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:39,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:39,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:30:39,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:39,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:39,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:39,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:39,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:30:39,341 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 14:30:39,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662691764] [2020-10-27 14:30:39,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:39,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:30:39,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662555047] [2020-10-27 14:30:39,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:30:39,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:39,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:30:39,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:30:39,349 INFO L87 Difference]: Start difference. First operand 93 states and 119 transitions. Second operand 6 states. [2020-10-27 14:30:39,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:39,514 INFO L93 Difference]: Finished difference Result 115 states and 143 transitions. [2020-10-27 14:30:39,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:30:39,515 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-27 14:30:39,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:39,516 INFO L225 Difference]: With dead ends: 115 [2020-10-27 14:30:39,516 INFO L226 Difference]: Without dead ends: 102 [2020-10-27 14:30:39,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:30:39,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-27 14:30:39,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 91. [2020-10-27 14:30:39,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 14:30:39,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 116 transitions. [2020-10-27 14:30:39,527 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 116 transitions. Word has length 27 [2020-10-27 14:30:39,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:39,527 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 116 transitions. [2020-10-27 14:30:39,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:30:39,528 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 116 transitions. [2020-10-27 14:30:39,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 14:30:39,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:39,529 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:39,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:30:39,530 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:39,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:39,530 INFO L82 PathProgramCache]: Analyzing trace with hash 211789364, now seen corresponding path program 1 times [2020-10-27 14:30:39,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:39,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129449567] [2020-10-27 14:30:39,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:39,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:39,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:39,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:39,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:40,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:40,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 14:30:40,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:30:40,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 827 [2020-10-27 14:30:40,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:40,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:30:40,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:30:40,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:30:40,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:40,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:40,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:40,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:40,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:40,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:40,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:40,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:30:40,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:40,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:40,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:40,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:40,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:40,438 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:30:40,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129449567] [2020-10-27 14:30:40,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:40,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:30:40,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109623182] [2020-10-27 14:30:40,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:30:40,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:40,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:30:40,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:30:40,440 INFO L87 Difference]: Start difference. First operand 91 states and 116 transitions. Second operand 7 states. [2020-10-27 14:30:40,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:40,592 INFO L93 Difference]: Finished difference Result 157 states and 200 transitions. [2020-10-27 14:30:40,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:30:40,593 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-27 14:30:40,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:40,595 INFO L225 Difference]: With dead ends: 157 [2020-10-27 14:30:40,595 INFO L226 Difference]: Without dead ends: 120 [2020-10-27 14:30:40,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:30:40,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-27 14:30:40,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 106. [2020-10-27 14:30:40,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-27 14:30:40,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 134 transitions. [2020-10-27 14:30:40,614 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 134 transitions. Word has length 27 [2020-10-27 14:30:40,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:40,615 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 134 transitions. [2020-10-27 14:30:40,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:30:40,615 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 134 transitions. [2020-10-27 14:30:40,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 14:30:40,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:40,616 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:40,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:30:40,617 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:40,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:40,618 INFO L82 PathProgramCache]: Analyzing trace with hash -867106042, now seen corresponding path program 2 times [2020-10-27 14:30:40,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:40,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626753342] [2020-10-27 14:30:40,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:40,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:40,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:40,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:40,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:41,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:41,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 14:30:41,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:30:41,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1238 [2020-10-27 14:30:41,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:41,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:30:41,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:30:41,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 14:30:41,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:41,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:41,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:41,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:41,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:41,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:41,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:41,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:30:41,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:41,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:41,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:41,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:41,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:41,971 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:30:41,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626753342] [2020-10-27 14:30:41,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:41,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:30:41,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807618637] [2020-10-27 14:30:41,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:30:41,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:41,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:30:41,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:30:41,974 INFO L87 Difference]: Start difference. First operand 106 states and 134 transitions. Second operand 8 states. [2020-10-27 14:30:42,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:42,123 INFO L93 Difference]: Finished difference Result 186 states and 240 transitions. [2020-10-27 14:30:42,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 14:30:42,124 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-27 14:30:42,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:42,126 INFO L225 Difference]: With dead ends: 186 [2020-10-27 14:30:42,126 INFO L226 Difference]: Without dead ends: 144 [2020-10-27 14:30:42,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:30:42,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-27 14:30:42,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 128. [2020-10-27 14:30:42,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-27 14:30:42,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 162 transitions. [2020-10-27 14:30:42,144 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 162 transitions. Word has length 28 [2020-10-27 14:30:42,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:42,144 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 162 transitions. [2020-10-27 14:30:42,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:30:42,145 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 162 transitions. [2020-10-27 14:30:42,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 14:30:42,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:42,148 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:42,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:30:42,149 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:42,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:42,150 INFO L82 PathProgramCache]: Analyzing trace with hash -2109920944, now seen corresponding path program 3 times [2020-10-27 14:30:42,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:42,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57514801] [2020-10-27 14:30:42,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:42,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:42,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:42,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:42,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:43,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:43,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 14:30:43,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:30:43,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1540 [2020-10-27 14:30:43,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:43,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:30:43,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:30:43,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:30:43,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:43,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:43,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:43,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:43,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:43,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:43,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:43,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:30:43,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:43,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:43,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:43,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:43,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:43,812 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:30:43,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57514801] [2020-10-27 14:30:43,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:43,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:30:43,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561985682] [2020-10-27 14:30:43,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:30:43,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:43,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:30:43,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:30:43,816 INFO L87 Difference]: Start difference. First operand 128 states and 162 transitions. Second operand 9 states. [2020-10-27 14:30:43,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:43,946 INFO L93 Difference]: Finished difference Result 210 states and 272 transitions. [2020-10-27 14:30:43,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:30:43,947 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-27 14:30:43,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:43,951 INFO L225 Difference]: With dead ends: 210 [2020-10-27 14:30:43,951 INFO L226 Difference]: Without dead ends: 168 [2020-10-27 14:30:43,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:30:43,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-27 14:30:43,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 152. [2020-10-27 14:30:43,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-27 14:30:43,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 194 transitions. [2020-10-27 14:30:43,968 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 194 transitions. Word has length 31 [2020-10-27 14:30:43,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:43,969 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 194 transitions. [2020-10-27 14:30:43,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:30:43,969 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 194 transitions. [2020-10-27 14:30:43,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 14:30:43,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:43,970 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:43,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:30:43,970 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:43,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:43,971 INFO L82 PathProgramCache]: Analyzing trace with hash 104392390, now seen corresponding path program 4 times [2020-10-27 14:30:43,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:43,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253633024] [2020-10-27 14:30:43,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:43,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:43,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:43,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:44,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:45,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:45,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 14:30:45,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:30:45,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1936 [2020-10-27 14:30:45,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:45,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:30:45,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:30:45,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 14:30:45,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:46,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:46,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:46,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:46,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:46,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:46,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:46,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:30:46,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:46,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:46,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:46,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:46,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:46,024 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:30:46,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253633024] [2020-10-27 14:30:46,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:46,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:30:46,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721909136] [2020-10-27 14:30:46,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:30:46,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:46,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:30:46,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:30:46,027 INFO L87 Difference]: Start difference. First operand 152 states and 194 transitions. Second operand 10 states. [2020-10-27 14:30:46,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:46,191 INFO L93 Difference]: Finished difference Result 234 states and 304 transitions. [2020-10-27 14:30:46,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:30:46,192 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-10-27 14:30:46,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:46,194 INFO L225 Difference]: With dead ends: 234 [2020-10-27 14:30:46,194 INFO L226 Difference]: Without dead ends: 192 [2020-10-27 14:30:46,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:30:46,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-27 14:30:46,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 176. [2020-10-27 14:30:46,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-27 14:30:46,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 226 transitions. [2020-10-27 14:30:46,204 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 226 transitions. Word has length 34 [2020-10-27 14:30:46,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:46,204 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 226 transitions. [2020-10-27 14:30:46,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:30:46,204 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 226 transitions. [2020-10-27 14:30:46,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 14:30:46,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:46,205 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:46,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:30:46,206 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:46,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:46,206 INFO L82 PathProgramCache]: Analyzing trace with hash 310226320, now seen corresponding path program 5 times [2020-10-27 14:30:46,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:46,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909667173] [2020-10-27 14:30:46,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:46,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:46,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:46,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:46,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:48,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:48,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 14:30:48,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:30:48,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2373 [2020-10-27 14:30:48,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:48,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:30:48,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:30:48,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 14:30:48,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:48,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:48,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:48,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:48,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:48,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:48,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:48,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:30:48,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:48,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:48,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:48,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:48,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:48,650 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-27 14:30:48,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909667173] [2020-10-27 14:30:48,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:30:48,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:30:48,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726920315] [2020-10-27 14:30:48,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:30:48,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:48,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:30:48,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:30:48,653 INFO L87 Difference]: Start difference. First operand 176 states and 226 transitions. Second operand 4 states. [2020-10-27 14:30:48,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:48,738 INFO L93 Difference]: Finished difference Result 346 states and 446 transitions. [2020-10-27 14:30:48,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:30:48,739 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-10-27 14:30:48,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:48,742 INFO L225 Difference]: With dead ends: 346 [2020-10-27 14:30:48,742 INFO L226 Difference]: Without dead ends: 178 [2020-10-27 14:30:48,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:30:48,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-27 14:30:48,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2020-10-27 14:30:48,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-27 14:30:48,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 227 transitions. [2020-10-27 14:30:48,760 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 227 transitions. Word has length 37 [2020-10-27 14:30:48,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:48,761 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 227 transitions. [2020-10-27 14:30:48,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:30:48,761 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 227 transitions. [2020-10-27 14:30:48,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 14:30:48,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:48,762 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:48,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:30:48,762 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:48,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:48,763 INFO L82 PathProgramCache]: Analyzing trace with hash -553163410, now seen corresponding path program 1 times [2020-10-27 14:30:48,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:48,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465481952] [2020-10-27 14:30:48,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:48,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:48,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:48,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:49,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:53,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:53,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 14:30:53,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:30:53,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:30:53,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:53,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:30:53,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:30:53,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:30:53,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:53,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:53,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:53,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:53,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:53,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:53,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:53,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:30:53,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:53,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:53,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:53,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:53,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:53,920 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:30:53,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465481952] [2020-10-27 14:30:53,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:53,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:30:53,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354031040] [2020-10-27 14:30:53,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:30:53,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:53,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:30:53,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:30:53,922 INFO L87 Difference]: Start difference. First operand 177 states and 227 transitions. Second operand 11 states. [2020-10-27 14:30:54,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:54,103 INFO L93 Difference]: Finished difference Result 259 states and 337 transitions. [2020-10-27 14:30:54,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:30:54,104 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-10-27 14:30:54,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:54,106 INFO L225 Difference]: With dead ends: 259 [2020-10-27 14:30:54,107 INFO L226 Difference]: Without dead ends: 217 [2020-10-27 14:30:54,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:30:54,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-27 14:30:54,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 201. [2020-10-27 14:30:54,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-27 14:30:54,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 259 transitions. [2020-10-27 14:30:54,124 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 259 transitions. Word has length 39 [2020-10-27 14:30:54,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:54,125 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 259 transitions. [2020-10-27 14:30:54,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:30:54,125 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 259 transitions. [2020-10-27 14:30:54,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 14:30:54,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:54,126 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:54,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:30:54,126 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:54,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:54,127 INFO L82 PathProgramCache]: Analyzing trace with hash 411225576, now seen corresponding path program 2 times [2020-10-27 14:30:54,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:54,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093241711] [2020-10-27 14:30:54,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:54,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:54,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:54,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:54,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:59,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:59,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 14:30:59,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:30:59,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:30:59,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:59,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:30:59,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:30:59,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 14:30:59,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:30:59,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:59,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:59,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:59,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:59,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:59,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:59,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:30:59,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:59,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:59,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:59,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:59,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:59,309 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:30:59,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093241711] [2020-10-27 14:30:59,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:59,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:30:59,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874680383] [2020-10-27 14:30:59,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:30:59,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:59,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:30:59,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:30:59,311 INFO L87 Difference]: Start difference. First operand 201 states and 259 transitions. Second operand 12 states. [2020-10-27 14:30:59,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:59,542 INFO L93 Difference]: Finished difference Result 283 states and 369 transitions. [2020-10-27 14:30:59,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:30:59,543 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2020-10-27 14:30:59,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:59,546 INFO L225 Difference]: With dead ends: 283 [2020-10-27 14:30:59,546 INFO L226 Difference]: Without dead ends: 241 [2020-10-27 14:30:59,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:30:59,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-27 14:30:59,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 225. [2020-10-27 14:30:59,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-10-27 14:30:59,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 291 transitions. [2020-10-27 14:30:59,557 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 291 transitions. Word has length 42 [2020-10-27 14:30:59,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:59,558 INFO L481 AbstractCegarLoop]: Abstraction has 225 states and 291 transitions. [2020-10-27 14:30:59,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:30:59,558 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 291 transitions. [2020-10-27 14:30:59,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:30:59,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:59,559 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:59,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:30:59,559 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:59,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:59,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1487264558, now seen corresponding path program 3 times [2020-10-27 14:30:59,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:59,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629150517] [2020-10-27 14:30:59,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:59,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:59,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:59,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:59,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:04,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:04,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 14:31:04,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:31:04,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:31:04,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:04,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:31:04,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:31:04,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 14:31:04,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:05,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:31:05,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:05,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:05,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:05,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:31:05,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:05,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:31:05,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:05,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:05,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:05,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:05,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:05,343 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 45 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:31:05,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629150517] [2020-10-27 14:31:05,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:31:05,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:31:05,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409861216] [2020-10-27 14:31:05,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:31:05,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:31:05,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:31:05,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:31:05,345 INFO L87 Difference]: Start difference. First operand 225 states and 291 transitions. Second operand 18 states. [2020-10-27 14:31:06,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:31:06,892 INFO L93 Difference]: Finished difference Result 409 states and 528 transitions. [2020-10-27 14:31:06,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:31:06,893 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-10-27 14:31:06,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:31:06,896 INFO L225 Difference]: With dead ends: 409 [2020-10-27 14:31:06,897 INFO L226 Difference]: Without dead ends: 405 [2020-10-27 14:31:06,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:31:06,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2020-10-27 14:31:06,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 156. [2020-10-27 14:31:06,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-27 14:31:06,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 199 transitions. [2020-10-27 14:31:06,916 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 199 transitions. Word has length 45 [2020-10-27 14:31:06,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:31:06,916 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 199 transitions. [2020-10-27 14:31:06,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:31:06,917 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 199 transitions. [2020-10-27 14:31:06,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 14:31:06,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:31:06,918 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:31:06,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:31:06,918 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:31:06,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:31:06,919 INFO L82 PathProgramCache]: Analyzing trace with hash -373368174, now seen corresponding path program 1 times [2020-10-27 14:31:06,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:31:06,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819845435] [2020-10-27 14:31:06,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:31:06,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:06,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:06,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:07,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:11,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:11,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:31:11,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:31:11,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:31:11,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:11,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:31:11,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:31:11,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 14:31:11,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:11,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:31:11,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:11,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:11,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:11,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:31:11,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:11,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:31:11,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:11,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:11,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:11,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:11,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:11,977 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-10-27 14:31:11,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819845435] [2020-10-27 14:31:11,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:31:11,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 14:31:11,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8251613] [2020-10-27 14:31:11,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:31:11,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:31:11,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:31:11,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:31:11,979 INFO L87 Difference]: Start difference. First operand 156 states and 199 transitions. Second operand 5 states. [2020-10-27 14:31:12,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:31:12,096 INFO L93 Difference]: Finished difference Result 306 states and 392 transitions. [2020-10-27 14:31:12,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:31:12,096 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-10-27 14:31:12,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:31:12,098 INFO L225 Difference]: With dead ends: 306 [2020-10-27 14:31:12,098 INFO L226 Difference]: Without dead ends: 159 [2020-10-27 14:31:12,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:31:12,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-27 14:31:12,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2020-10-27 14:31:12,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-27 14:31:12,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 201 transitions. [2020-10-27 14:31:12,125 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 201 transitions. Word has length 47 [2020-10-27 14:31:12,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:31:12,125 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 201 transitions. [2020-10-27 14:31:12,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:31:12,126 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 201 transitions. [2020-10-27 14:31:12,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 14:31:12,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:31:12,126 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:31:12,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:31:12,127 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:31:12,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:31:12,127 INFO L82 PathProgramCache]: Analyzing trace with hash -115157776, now seen corresponding path program 2 times [2020-10-27 14:31:12,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:31:12,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587778521] [2020-10-27 14:31:12,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:31:12,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:12,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:12,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:12,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:17,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:17,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 14:31:17,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:31:17,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:31:17,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:17,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:31:17,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:31:17,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 14:31:17,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:17,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:31:17,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:17,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:17,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:17,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:31:17,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:17,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:31:17,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:17,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:17,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:17,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:17,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:17,597 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 54 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:31:17,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587778521] [2020-10-27 14:31:17,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:31:17,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:31:17,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710824413] [2020-10-27 14:31:17,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:31:17,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:31:17,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:31:17,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:31:17,600 INFO L87 Difference]: Start difference. First operand 158 states and 201 transitions. Second operand 18 states. [2020-10-27 14:31:18,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:31:18,979 INFO L93 Difference]: Finished difference Result 388 states and 499 transitions. [2020-10-27 14:31:18,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:31:18,980 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 49 [2020-10-27 14:31:18,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:31:18,983 INFO L225 Difference]: With dead ends: 388 [2020-10-27 14:31:18,983 INFO L226 Difference]: Without dead ends: 384 [2020-10-27 14:31:18,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=288, Invalid=902, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:31:18,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2020-10-27 14:31:19,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 192. [2020-10-27 14:31:19,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-27 14:31:19,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 245 transitions. [2020-10-27 14:31:19,012 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 245 transitions. Word has length 49 [2020-10-27 14:31:19,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:31:19,012 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 245 transitions. [2020-10-27 14:31:19,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:31:19,013 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 245 transitions. [2020-10-27 14:31:19,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 14:31:19,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:31:19,014 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:31:19,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:31:19,014 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:31:19,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:31:19,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1016870356, now seen corresponding path program 1 times [2020-10-27 14:31:19,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:31:19,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145814361] [2020-10-27 14:31:19,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:31:19,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:19,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:19,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:19,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:24,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:24,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 14:31:24,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:31:24,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:31:24,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:24,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:31:24,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:31:24,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:31:24,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:24,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:31:24,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:24,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:24,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:24,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:31:24,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:24,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:31:24,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:24,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:24,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:24,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:24,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:24,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-27 14:31:24,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:24,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:24,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:24,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:31:24,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:24,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:31:24,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:24,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:24,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:31:24,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:24,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:24,099 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2020-10-27 14:31:24,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145814361] [2020-10-27 14:31:24,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:31:24,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:31:24,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553572926] [2020-10-27 14:31:24,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:31:24,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:31:24,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:31:24,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:31:24,102 INFO L87 Difference]: Start difference. First operand 192 states and 245 transitions. Second operand 6 states. [2020-10-27 14:31:24,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:31:24,209 INFO L93 Difference]: Finished difference Result 376 states and 482 transitions. [2020-10-27 14:31:24,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:31:24,210 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-27 14:31:24,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:31:24,211 INFO L225 Difference]: With dead ends: 376 [2020-10-27 14:31:24,212 INFO L226 Difference]: Without dead ends: 195 [2020-10-27 14:31:24,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:31:24,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-27 14:31:24,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2020-10-27 14:31:24,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-27 14:31:24,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 247 transitions. [2020-10-27 14:31:24,235 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 247 transitions. Word has length 55 [2020-10-27 14:31:24,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:31:24,235 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 247 transitions. [2020-10-27 14:31:24,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:31:24,235 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 247 transitions. [2020-10-27 14:31:24,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 14:31:24,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:31:24,237 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:31:24,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:31:24,237 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:31:24,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:31:24,238 INFO L82 PathProgramCache]: Analyzing trace with hash 2122773042, now seen corresponding path program 2 times [2020-10-27 14:31:24,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:31:24,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621671332] [2020-10-27 14:31:24,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:31:24,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:24,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:24,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:25,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:29,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:29,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 14:31:29,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:31:29,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:31:29,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:29,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:31:29,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:31:29,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 14:31:29,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:29,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:31:29,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:29,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:29,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:29,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:31:29,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:29,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:31:29,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:29,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:29,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:29,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:29,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:29,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-27 14:31:29,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:29,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:29,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:29,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:31:29,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:29,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:31:29,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:29,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:29,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:31:29,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:29,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:29,427 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 117 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-27 14:31:29,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621671332] [2020-10-27 14:31:29,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:31:29,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:31:29,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479092053] [2020-10-27 14:31:29,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:31:29,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:31:29,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:31:29,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:31:29,434 INFO L87 Difference]: Start difference. First operand 194 states and 247 transitions. Second operand 13 states. [2020-10-27 14:31:29,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:31:29,696 INFO L93 Difference]: Finished difference Result 281 states and 360 transitions. [2020-10-27 14:31:29,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:31:29,697 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2020-10-27 14:31:29,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:31:29,699 INFO L225 Difference]: With dead ends: 281 [2020-10-27 14:31:29,699 INFO L226 Difference]: Without dead ends: 227 [2020-10-27 14:31:29,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:31:29,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-27 14:31:29,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 209. [2020-10-27 14:31:29,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-10-27 14:31:29,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 267 transitions. [2020-10-27 14:31:29,732 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 267 transitions. Word has length 57 [2020-10-27 14:31:29,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:31:29,733 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 267 transitions. [2020-10-27 14:31:29,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:31:29,733 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 267 transitions. [2020-10-27 14:31:29,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 14:31:29,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:31:29,735 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:31:29,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:31:29,738 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:31:29,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:31:29,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1947512012, now seen corresponding path program 3 times [2020-10-27 14:31:29,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:31:29,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250101119] [2020-10-27 14:31:29,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:31:29,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:29,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:29,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:30,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:34,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:34,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 14:31:34,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:31:34,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:31:34,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:34,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:31:34,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:31:34,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 14:31:34,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:34,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:31:34,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:34,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:34,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:34,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:31:34,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:34,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:31:34,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:34,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:34,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:34,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:34,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:34,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-27 14:31:34,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:34,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:34,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:34,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:31:34,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:34,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:31:34,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:34,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:34,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:31:34,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:34,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:34,846 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-27 14:31:34,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250101119] [2020-10-27 14:31:34,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:31:34,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:31:34,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455723493] [2020-10-27 14:31:34,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:31:34,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:31:34,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:31:34,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:31:34,849 INFO L87 Difference]: Start difference. First operand 209 states and 267 transitions. Second operand 7 states. [2020-10-27 14:31:34,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:31:34,967 INFO L93 Difference]: Finished difference Result 408 states and 524 transitions. [2020-10-27 14:31:34,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:31:34,968 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 60 [2020-10-27 14:31:34,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:31:34,972 INFO L225 Difference]: With dead ends: 408 [2020-10-27 14:31:34,972 INFO L226 Difference]: Without dead ends: 212 [2020-10-27 14:31:34,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:31:34,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-27 14:31:35,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2020-10-27 14:31:35,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-27 14:31:35,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 269 transitions. [2020-10-27 14:31:35,010 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 269 transitions. Word has length 60 [2020-10-27 14:31:35,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:31:35,010 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 269 transitions. [2020-10-27 14:31:35,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:31:35,011 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 269 transitions. [2020-10-27 14:31:35,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 14:31:35,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:31:35,013 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:31:35,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:31:35,013 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:31:35,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:31:35,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1539154326, now seen corresponding path program 4 times [2020-10-27 14:31:35,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:31:35,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657094698] [2020-10-27 14:31:35,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:31:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:35,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:35,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:36,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:40,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:40,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 14:31:40,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:31:40,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-27 14:31:40,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:40,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:31:40,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:31:40,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 14:31:40,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:40,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:31:40,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:40,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:40,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:40,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:31:40,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:40,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:31:40,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:40,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:40,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:40,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:40,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:40,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-27 14:31:40,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:40,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:40,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:40,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:31:40,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:40,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:31:40,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:40,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:40,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:31:40,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:40,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:40,245 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 2 proven. 145 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-27 14:31:40,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657094698] [2020-10-27 14:31:40,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:31:40,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:31:40,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946731093] [2020-10-27 14:31:40,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:31:40,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:31:40,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:31:40,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:31:40,250 INFO L87 Difference]: Start difference. First operand 211 states and 269 transitions. Second operand 14 states. [2020-10-27 14:31:40,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:31:40,462 INFO L93 Difference]: Finished difference Result 298 states and 382 transitions. [2020-10-27 14:31:40,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:31:40,464 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-10-27 14:31:40,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:31:40,467 INFO L225 Difference]: With dead ends: 298 [2020-10-27 14:31:40,467 INFO L226 Difference]: Without dead ends: 244 [2020-10-27 14:31:40,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:31:40,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-27 14:31:40,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 226. [2020-10-27 14:31:40,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-27 14:31:40,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 289 transitions. [2020-10-27 14:31:40,499 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 289 transitions. Word has length 62 [2020-10-27 14:31:40,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:31:40,501 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 289 transitions. [2020-10-27 14:31:40,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:31:40,501 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 289 transitions. [2020-10-27 14:31:40,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 14:31:40,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:31:40,509 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:31:40,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:31:40,510 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:31:40,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:31:40,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1789901136, now seen corresponding path program 5 times [2020-10-27 14:31:40,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:31:40,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570143235] [2020-10-27 14:31:40,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:31:40,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:40,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:40,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:41,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:45,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:45,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 14:31:45,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:31:45,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:31:45,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:45,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:31:45,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:31:45,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 14:31:45,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:45,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:31:45,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:45,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:45,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:45,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:31:45,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:45,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:31:45,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:45,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:45,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:45,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:45,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:46,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-27 14:31:46,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:46,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:46,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:46,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:31:46,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:46,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:31:46,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:46,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:31:46,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:46,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:31:46,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:46,026 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 86 proven. 94 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 14:31:46,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570143235] [2020-10-27 14:31:46,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:31:46,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:31:46,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513732551] [2020-10-27 14:31:46,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:31:46,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:31:46,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:31:46,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:31:46,030 INFO L87 Difference]: Start difference. First operand 226 states and 289 transitions. Second operand 21 states. [2020-10-27 14:31:48,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:31:48,238 INFO L93 Difference]: Finished difference Result 793 states and 1038 transitions. [2020-10-27 14:31:48,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 14:31:48,239 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 65 [2020-10-27 14:31:48,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:31:48,248 INFO L225 Difference]: With dead ends: 793 [2020-10-27 14:31:48,248 INFO L226 Difference]: Without dead ends: 789 [2020-10-27 14:31:48,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=456, Invalid=1800, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 14:31:48,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2020-10-27 14:31:48,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 337. [2020-10-27 14:31:48,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-10-27 14:31:48,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 436 transitions. [2020-10-27 14:31:48,296 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 436 transitions. Word has length 65 [2020-10-27 14:31:48,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:31:48,296 INFO L481 AbstractCegarLoop]: Abstraction has 337 states and 436 transitions. [2020-10-27 14:31:48,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:31:48,296 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 436 transitions. [2020-10-27 14:31:48,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 14:31:48,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:31:48,298 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:31:48,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:31:48,300 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:31:48,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:31:48,301 INFO L82 PathProgramCache]: Analyzing trace with hash 100957394, now seen corresponding path program 1 times [2020-10-27 14:31:48,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:31:48,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418080710] [2020-10-27 14:31:48,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:31:48,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:48,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:48,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:49,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:53,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:53,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 14:31:53,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:31:53,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:31:53,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:53,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:31:53,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:31:53,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 14:31:53,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:53,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:31:53,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:53,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:53,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:53,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:31:53,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:53,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:31:53,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:53,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:53,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:53,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:53,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:53,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-27 14:31:53,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:53,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:53,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:53,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:31:53,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:53,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:31:53,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:53,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:53,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:31:53,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:53,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:53,515 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 2 proven. 176 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-27 14:31:53,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418080710] [2020-10-27 14:31:53,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:31:53,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:31:53,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381537303] [2020-10-27 14:31:53,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:31:53,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:31:53,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:31:53,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:31:53,517 INFO L87 Difference]: Start difference. First operand 337 states and 436 transitions. Second operand 15 states. [2020-10-27 14:31:53,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:31:53,758 INFO L93 Difference]: Finished difference Result 454 states and 591 transitions. [2020-10-27 14:31:53,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:31:53,759 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 65 [2020-10-27 14:31:53,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:31:53,761 INFO L225 Difference]: With dead ends: 454 [2020-10-27 14:31:53,761 INFO L226 Difference]: Without dead ends: 385 [2020-10-27 14:31:53,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:31:53,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2020-10-27 14:31:53,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 364. [2020-10-27 14:31:53,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2020-10-27 14:31:53,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 472 transitions. [2020-10-27 14:31:53,782 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 472 transitions. Word has length 65 [2020-10-27 14:31:53,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:31:53,782 INFO L481 AbstractCegarLoop]: Abstraction has 364 states and 472 transitions. [2020-10-27 14:31:53,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:31:53,782 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 472 transitions. [2020-10-27 14:31:53,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 14:31:53,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:31:53,784 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:31:53,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:31:53,784 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:31:53,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:31:53,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1151046360, now seen corresponding path program 2 times [2020-10-27 14:31:53,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:31:53,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910964202] [2020-10-27 14:31:53,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:31:53,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:53,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:53,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:55,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:58,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:58,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 14:31:58,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:31:58,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:31:58,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:58,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:31:58,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:31:58,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 14:31:58,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:59,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:31:59,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:59,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:59,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:59,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:31:59,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:59,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:31:59,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:59,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:59,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:59,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:59,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:59,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-27 14:31:59,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:59,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:59,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:59,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:31:59,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:59,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:31:59,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:59,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:31:59,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:59,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:31:59,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:59,388 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 86 proven. 128 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 14:31:59,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910964202] [2020-10-27 14:31:59,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:31:59,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:31:59,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465755846] [2020-10-27 14:31:59,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:31:59,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:31:59,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:31:59,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:31:59,390 INFO L87 Difference]: Start difference. First operand 364 states and 472 transitions. Second operand 22 states. [2020-10-27 14:32:01,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:32:01,887 INFO L93 Difference]: Finished difference Result 1274 states and 1689 transitions. [2020-10-27 14:32:01,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 14:32:01,888 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2020-10-27 14:32:01,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:32:01,897 INFO L225 Difference]: With dead ends: 1274 [2020-10-27 14:32:01,897 INFO L226 Difference]: Without dead ends: 1270 [2020-10-27 14:32:01,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=492, Invalid=1860, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 14:32:01,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1270 states. [2020-10-27 14:32:01,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1270 to 382. [2020-10-27 14:32:01,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 382 states. [2020-10-27 14:32:01,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 495 transitions. [2020-10-27 14:32:01,945 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 495 transitions. Word has length 68 [2020-10-27 14:32:01,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:32:01,946 INFO L481 AbstractCegarLoop]: Abstraction has 382 states and 495 transitions. [2020-10-27 14:32:01,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:32:01,946 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 495 transitions. [2020-10-27 14:32:01,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 14:32:01,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:32:01,947 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:32:01,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:32:01,948 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:32:01,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:32:01,948 INFO L82 PathProgramCache]: Analyzing trace with hash -238321896, now seen corresponding path program 3 times [2020-10-27 14:32:01,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:32:01,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116194289] [2020-10-27 14:32:01,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:32:01,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:01,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:02,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:02,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:06,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:06,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 14:32:06,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:32:06,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:32:06,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:06,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:32:06,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:32:06,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 14:32:06,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:07,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:32:07,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:07,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:07,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:07,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:32:07,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:07,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:32:07,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:07,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:07,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:32:07,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:07,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:07,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-27 14:32:07,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:07,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:07,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:07,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:32:07,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:07,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:32:07,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:07,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:07,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:32:07,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:07,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:07,041 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2020-10-27 14:32:07,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116194289] [2020-10-27 14:32:07,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:32:07,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:32:07,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005633456] [2020-10-27 14:32:07,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:32:07,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:32:07,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:32:07,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:32:07,044 INFO L87 Difference]: Start difference. First operand 382 states and 495 transitions. Second operand 8 states. [2020-10-27 14:32:07,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:32:07,190 INFO L93 Difference]: Finished difference Result 752 states and 978 transitions. [2020-10-27 14:32:07,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 14:32:07,191 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 68 [2020-10-27 14:32:07,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:32:07,193 INFO L225 Difference]: With dead ends: 752 [2020-10-27 14:32:07,194 INFO L226 Difference]: Without dead ends: 385 [2020-10-27 14:32:07,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:32:07,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2020-10-27 14:32:07,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 384. [2020-10-27 14:32:07,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-10-27 14:32:07,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 497 transitions. [2020-10-27 14:32:07,224 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 497 transitions. Word has length 68 [2020-10-27 14:32:07,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:32:07,225 INFO L481 AbstractCegarLoop]: Abstraction has 384 states and 497 transitions. [2020-10-27 14:32:07,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:32:07,225 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 497 transitions. [2020-10-27 14:32:07,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 14:32:07,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:32:07,227 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:32:07,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:32:07,227 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:32:07,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:32:07,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1805798266, now seen corresponding path program 4 times [2020-10-27 14:32:07,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:32:07,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068443751] [2020-10-27 14:32:07,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:32:07,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:07,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:07,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:07,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:12,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:12,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 14:32:12,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:32:12,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 14:32:12,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:12,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:32:12,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:32:12,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 14:32:12,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:12,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:32:12,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:12,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:12,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:12,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:32:12,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:12,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:32:12,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:12,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:12,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:32:12,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:12,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:12,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-27 14:32:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:12,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:12,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:12,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:32:12,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:12,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:32:12,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:12,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:12,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:32:12,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:12,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:12,492 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 2 proven. 210 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-27 14:32:12,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068443751] [2020-10-27 14:32:12,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:32:12,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:32:12,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968826656] [2020-10-27 14:32:12,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:32:12,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:32:12,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:32:12,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:32:12,494 INFO L87 Difference]: Start difference. First operand 384 states and 497 transitions. Second operand 16 states. [2020-10-27 14:32:12,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:32:12,759 INFO L93 Difference]: Finished difference Result 519 states and 675 transitions. [2020-10-27 14:32:12,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:32:12,759 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 70 [2020-10-27 14:32:12,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:32:12,762 INFO L225 Difference]: With dead ends: 519 [2020-10-27 14:32:12,762 INFO L226 Difference]: Without dead ends: 432 [2020-10-27 14:32:12,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:32:12,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-10-27 14:32:12,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 411. [2020-10-27 14:32:12,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411 states. [2020-10-27 14:32:12,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 533 transitions. [2020-10-27 14:32:12,792 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 533 transitions. Word has length 70 [2020-10-27 14:32:12,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:32:12,792 INFO L481 AbstractCegarLoop]: Abstraction has 411 states and 533 transitions. [2020-10-27 14:32:12,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:32:12,792 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 533 transitions. [2020-10-27 14:32:12,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 14:32:12,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:32:12,794 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:32:12,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:32:12,795 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:32:12,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:32:12,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1998923666, now seen corresponding path program 5 times [2020-10-27 14:32:12,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:32:12,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115935967] [2020-10-27 14:32:12,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:32:12,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:12,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:12,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:13,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:17,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:17,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 14:32:17,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:32:17,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:32:17,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:17,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:32:17,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:32:17,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 14:32:17,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:18,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:32:18,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:18,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:18,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:18,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:32:18,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:18,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:32:18,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:18,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:18,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:32:18,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:18,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:18,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-27 14:32:18,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:18,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:18,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:18,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:32:18,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:18,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:32:18,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:18,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:18,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:32:18,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:18,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:18,056 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 2 proven. 247 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-27 14:32:18,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115935967] [2020-10-27 14:32:18,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:32:18,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:32:18,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237138381] [2020-10-27 14:32:18,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:32:18,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:32:18,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:32:18,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:32:18,058 INFO L87 Difference]: Start difference. First operand 411 states and 533 transitions. Second operand 17 states. [2020-10-27 14:32:18,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:32:18,331 INFO L93 Difference]: Finished difference Result 546 states and 711 transitions. [2020-10-27 14:32:18,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:32:18,332 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2020-10-27 14:32:18,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:32:18,334 INFO L225 Difference]: With dead ends: 546 [2020-10-27 14:32:18,335 INFO L226 Difference]: Without dead ends: 459 [2020-10-27 14:32:18,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:32:18,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2020-10-27 14:32:18,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 438. [2020-10-27 14:32:18,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 438 states. [2020-10-27 14:32:18,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 569 transitions. [2020-10-27 14:32:18,365 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 569 transitions. Word has length 73 [2020-10-27 14:32:18,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:32:18,365 INFO L481 AbstractCegarLoop]: Abstraction has 438 states and 569 transitions. [2020-10-27 14:32:18,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:32:18,366 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 569 transitions. [2020-10-27 14:32:18,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 14:32:18,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:32:18,367 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:32:18,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:32:18,368 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:32:18,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:32:18,368 INFO L82 PathProgramCache]: Analyzing trace with hash 11908858, now seen corresponding path program 6 times [2020-10-27 14:32:18,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:32:18,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1419398688] [2020-10-27 14:32:18,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:32:18,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:18,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:18,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:18,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:23,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:23,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 14:32:23,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:32:23,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 14:32:23,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:23,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:32:23,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:32:23,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 14:32:23,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:23,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:32:23,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:23,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:23,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:23,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:32:23,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:23,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:32:23,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:23,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:23,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:32:23,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:23,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:23,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-27 14:32:23,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:23,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:23,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:23,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:32:23,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:23,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:32:23,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:23,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:23,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:32:23,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:23,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:23,659 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 2 proven. 287 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-27 14:32:23,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1419398688] [2020-10-27 14:32:23,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:32:23,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:32:23,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431387015] [2020-10-27 14:32:23,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:32:23,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:32:23,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:32:23,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:32:23,661 INFO L87 Difference]: Start difference. First operand 438 states and 569 transitions. Second operand 18 states. [2020-10-27 14:32:23,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:32:23,942 INFO L93 Difference]: Finished difference Result 573 states and 747 transitions. [2020-10-27 14:32:23,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:32:23,943 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 76 [2020-10-27 14:32:23,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:32:23,950 INFO L225 Difference]: With dead ends: 573 [2020-10-27 14:32:23,951 INFO L226 Difference]: Without dead ends: 486 [2020-10-27 14:32:23,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:32:23,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2020-10-27 14:32:23,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 465. [2020-10-27 14:32:23,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 465 states. [2020-10-27 14:32:23,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 605 transitions. [2020-10-27 14:32:23,981 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 605 transitions. Word has length 76 [2020-10-27 14:32:23,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:32:23,982 INFO L481 AbstractCegarLoop]: Abstraction has 465 states and 605 transitions. [2020-10-27 14:32:23,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:32:23,982 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 605 transitions. [2020-10-27 14:32:23,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 14:32:23,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:32:23,985 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:32:23,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 14:32:23,985 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:32:23,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:32:23,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1480213266, now seen corresponding path program 7 times [2020-10-27 14:32:23,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:32:23,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1747842055] [2020-10-27 14:32:23,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:32:24,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:24,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:24,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:24,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:29,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:29,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 14:32:29,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:32:29,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:32:29,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:29,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:32:29,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:32:29,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:32:29,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:29,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:32:29,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:29,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:29,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:29,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:32:29,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:29,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:32:29,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:29,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:29,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:32:29,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:29,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:29,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-27 14:32:29,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:29,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:29,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:29,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:32:29,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:29,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:32:29,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:29,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:29,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:32:29,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:29,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:29,111 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2020-10-27 14:32:29,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1747842055] [2020-10-27 14:32:29,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:32:29,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:32:29,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380862657] [2020-10-27 14:32:29,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:32:29,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:32:29,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:32:29,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:32:29,113 INFO L87 Difference]: Start difference. First operand 465 states and 605 transitions. Second operand 9 states. [2020-10-27 14:32:29,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:32:29,254 INFO L93 Difference]: Finished difference Result 916 states and 1196 transitions. [2020-10-27 14:32:29,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:32:29,255 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 79 [2020-10-27 14:32:29,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:32:29,257 INFO L225 Difference]: With dead ends: 916 [2020-10-27 14:32:29,257 INFO L226 Difference]: Without dead ends: 468 [2020-10-27 14:32:29,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:32:29,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2020-10-27 14:32:29,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 467. [2020-10-27 14:32:29,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 467 states. [2020-10-27 14:32:29,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 607 transitions. [2020-10-27 14:32:29,285 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 607 transitions. Word has length 79 [2020-10-27 14:32:29,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:32:29,285 INFO L481 AbstractCegarLoop]: Abstraction has 467 states and 607 transitions. [2020-10-27 14:32:29,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:32:29,286 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 607 transitions. [2020-10-27 14:32:29,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 14:32:29,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:32:29,287 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:32:29,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 14:32:29,288 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:32:29,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:32:29,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1308147532, now seen corresponding path program 8 times [2020-10-27 14:32:29,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:32:29,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306894245] [2020-10-27 14:32:29,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:32:29,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:29,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:29,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:29,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:34,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:34,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 14:32:34,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:32:34,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-27 14:32:34,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:34,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:32:34,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:32:34,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 14:32:34,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:34,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:32:34,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:34,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:34,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:34,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:32:34,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:34,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:32:34,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:34,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:34,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:32:34,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:34,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:34,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-27 14:32:34,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:34,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:34,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:34,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:32:34,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:34,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:32:34,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:34,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:34,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:32:34,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:34,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:34,622 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 2 proven. 330 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-27 14:32:34,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306894245] [2020-10-27 14:32:34,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:32:34,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:32:34,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958358165] [2020-10-27 14:32:34,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:32:34,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:32:34,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:32:34,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:32:34,624 INFO L87 Difference]: Start difference. First operand 467 states and 607 transitions. Second operand 19 states. [2020-10-27 14:32:34,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:32:34,929 INFO L93 Difference]: Finished difference Result 602 states and 785 transitions. [2020-10-27 14:32:34,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:32:34,930 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 81 [2020-10-27 14:32:34,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:32:34,932 INFO L225 Difference]: With dead ends: 602 [2020-10-27 14:32:34,932 INFO L226 Difference]: Without dead ends: 515 [2020-10-27 14:32:34,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:32:34,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2020-10-27 14:32:34,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 494. [2020-10-27 14:32:34,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 494 states. [2020-10-27 14:32:34,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 643 transitions. [2020-10-27 14:32:34,960 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 643 transitions. Word has length 81 [2020-10-27 14:32:34,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:32:34,961 INFO L481 AbstractCegarLoop]: Abstraction has 494 states and 643 transitions. [2020-10-27 14:32:34,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:32:34,961 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 643 transitions. [2020-10-27 14:32:34,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 14:32:34,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:32:34,963 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:32:34,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 14:32:34,963 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:32:34,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:32:34,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1284834468, now seen corresponding path program 9 times [2020-10-27 14:32:34,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:32:34,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783553059] [2020-10-27 14:32:34,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:32:34,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:35,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:35,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:35,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:39,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:40,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 14:32:40,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:32:40,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 14:32:40,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:40,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:32:40,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:32:40,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 14:32:40,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:40,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:32:40,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:40,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:40,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:40,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:32:40,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:40,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:32:40,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:40,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:40,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:32:40,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:40,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:40,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-27 14:32:40,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:40,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:40,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:40,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:32:40,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:40,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:32:40,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:40,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:40,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:32:40,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:40,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:40,304 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 2 proven. 376 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-27 14:32:40,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783553059] [2020-10-27 14:32:40,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:32:40,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:32:40,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031077728] [2020-10-27 14:32:40,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:32:40,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:32:40,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:32:40,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:32:40,306 INFO L87 Difference]: Start difference. First operand 494 states and 643 transitions. Second operand 20 states. [2020-10-27 14:32:40,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:32:40,573 INFO L93 Difference]: Finished difference Result 629 states and 821 transitions. [2020-10-27 14:32:40,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:32:40,573 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 84 [2020-10-27 14:32:40,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:32:40,576 INFO L225 Difference]: With dead ends: 629 [2020-10-27 14:32:40,577 INFO L226 Difference]: Without dead ends: 542 [2020-10-27 14:32:40,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:32:40,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2020-10-27 14:32:40,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 521. [2020-10-27 14:32:40,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 521 states. [2020-10-27 14:32:40,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 679 transitions. [2020-10-27 14:32:40,601 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 679 transitions. Word has length 84 [2020-10-27 14:32:40,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:32:40,602 INFO L481 AbstractCegarLoop]: Abstraction has 521 states and 679 transitions. [2020-10-27 14:32:40,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:32:40,602 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 679 transitions. [2020-10-27 14:32:40,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 14:32:40,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:32:40,604 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:32:40,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 14:32:40,604 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:32:40,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:32:40,605 INFO L82 PathProgramCache]: Analyzing trace with hash 470189388, now seen corresponding path program 10 times [2020-10-27 14:32:40,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:32:40,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065361680] [2020-10-27 14:32:40,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:32:40,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:40,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:40,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:41,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:45,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:45,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 14:32:45,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:32:45,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-27 14:32:45,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:45,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:32:45,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:32:45,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 14:32:45,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:45,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:32:45,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:45,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:45,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:45,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:32:45,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:45,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:32:45,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:45,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:45,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:32:45,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:45,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:45,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-27 14:32:45,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:45,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:45,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:45,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:32:45,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:45,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:32:45,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:45,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:45,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:32:45,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:45,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:45,980 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 2 proven. 425 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-27 14:32:45,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065361680] [2020-10-27 14:32:45,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:32:45,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:32:45,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079886521] [2020-10-27 14:32:45,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:32:45,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:32:45,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:32:45,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:32:45,982 INFO L87 Difference]: Start difference. First operand 521 states and 679 transitions. Second operand 21 states. [2020-10-27 14:32:46,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:32:46,309 INFO L93 Difference]: Finished difference Result 656 states and 857 transitions. [2020-10-27 14:32:46,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:32:46,310 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 87 [2020-10-27 14:32:46,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:32:46,313 INFO L225 Difference]: With dead ends: 656 [2020-10-27 14:32:46,313 INFO L226 Difference]: Without dead ends: 569 [2020-10-27 14:32:46,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:32:46,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2020-10-27 14:32:46,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 548. [2020-10-27 14:32:46,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 548 states. [2020-10-27 14:32:46,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 715 transitions. [2020-10-27 14:32:46,340 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 715 transitions. Word has length 87 [2020-10-27 14:32:46,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:32:46,340 INFO L481 AbstractCegarLoop]: Abstraction has 548 states and 715 transitions. [2020-10-27 14:32:46,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:32:46,340 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 715 transitions. [2020-10-27 14:32:46,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-27 14:32:46,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:32:46,342 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:32:46,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 14:32:46,343 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:32:46,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:32:46,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1748989276, now seen corresponding path program 11 times [2020-10-27 14:32:46,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:32:46,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226390095] [2020-10-27 14:32:46,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:32:46,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:46,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:46,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:46,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:51,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:51,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 14:32:51,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:32:51,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 14:32:51,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:51,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:32:51,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:32:51,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 14:32:51,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:51,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:32:51,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:51,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:51,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:51,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:32:51,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:51,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:32:51,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:51,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:51,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:32:51,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:51,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:51,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-10-27 14:32:51,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:51,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:51,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:51,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:32:51,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:51,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:32:51,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:51,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:51,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:32:51,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:51,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:51,758 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 2 proven. 477 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-27 14:32:51,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226390095] [2020-10-27 14:32:51,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:32:51,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:32:51,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902906464] [2020-10-27 14:32:51,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:32:51,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:32:51,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:32:51,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:32:51,759 INFO L87 Difference]: Start difference. First operand 548 states and 715 transitions. Second operand 22 states. [2020-10-27 14:32:52,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:32:52,103 INFO L93 Difference]: Finished difference Result 683 states and 893 transitions. [2020-10-27 14:32:52,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:32:52,104 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 90 [2020-10-27 14:32:52,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:32:52,107 INFO L225 Difference]: With dead ends: 683 [2020-10-27 14:32:52,107 INFO L226 Difference]: Without dead ends: 596 [2020-10-27 14:32:52,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:32:52,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2020-10-27 14:32:52,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 575. [2020-10-27 14:32:52,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 575 states. [2020-10-27 14:32:52,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 751 transitions. [2020-10-27 14:32:52,138 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 751 transitions. Word has length 90 [2020-10-27 14:32:52,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:32:52,139 INFO L481 AbstractCegarLoop]: Abstraction has 575 states and 751 transitions. [2020-10-27 14:32:52,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:32:52,139 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 751 transitions. [2020-10-27 14:32:52,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 14:32:52,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:32:52,142 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:32:52,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 14:32:52,143 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:32:52,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:32:52,143 INFO L82 PathProgramCache]: Analyzing trace with hash 2116537164, now seen corresponding path program 12 times [2020-10-27 14:32:52,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:32:52,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1902032212] [2020-10-27 14:32:52,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:32:52,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:52,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:52,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:52,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:57,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:57,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-27 14:32:57,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:32:57,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:32:57,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:57,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:32:57,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:32:57,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:32:57,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:57,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:32:57,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:57,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:57,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:57,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:32:57,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:57,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:32:57,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:57,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:57,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:32:57,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:57,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:57,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-27 14:32:57,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:57,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:57,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:57,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:32:57,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:57,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:32:57,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:57,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:57,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:32:57,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:57,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:57,285 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2020-10-27 14:32:57,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1902032212] [2020-10-27 14:32:57,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:32:57,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:32:57,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256943734] [2020-10-27 14:32:57,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:32:57,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:32:57,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:32:57,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:32:57,287 INFO L87 Difference]: Start difference. First operand 575 states and 751 transitions. Second operand 10 states. [2020-10-27 14:32:57,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:32:57,408 INFO L93 Difference]: Finished difference Result 1134 states and 1486 transitions. [2020-10-27 14:32:57,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:32:57,408 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 93 [2020-10-27 14:32:57,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:32:57,411 INFO L225 Difference]: With dead ends: 1134 [2020-10-27 14:32:57,411 INFO L226 Difference]: Without dead ends: 578 [2020-10-27 14:32:57,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:32:57,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2020-10-27 14:32:57,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 577. [2020-10-27 14:32:57,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 577 states. [2020-10-27 14:32:57,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 753 transitions. [2020-10-27 14:32:57,438 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 753 transitions. Word has length 93 [2020-10-27 14:32:57,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:32:57,439 INFO L481 AbstractCegarLoop]: Abstraction has 577 states and 753 transitions. [2020-10-27 14:32:57,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:32:57,439 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 753 transitions. [2020-10-27 14:32:57,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-27 14:32:57,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:32:57,441 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:32:57,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 14:32:57,441 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:32:57,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:32:57,442 INFO L82 PathProgramCache]: Analyzing trace with hash -2071965398, now seen corresponding path program 13 times [2020-10-27 14:32:57,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:32:57,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503540906] [2020-10-27 14:32:57,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:32:57,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:57,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:57,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:58,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:02,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:02,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 14:33:02,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:33:02,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-27 14:33:02,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:02,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:33:02,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:33:02,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 14:33:02,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:02,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:33:02,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:02,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:02,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:02,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:33:02,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:33:02,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:33:02,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:02,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:33:02,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:33:02,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:33:02,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:02,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-27 14:33:02,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:02,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:02,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:02,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:33:02,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:33:02,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:33:02,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:02,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:33:02,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:33:02,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:33:02,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:02,621 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2020-10-27 14:33:02,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503540906] [2020-10-27 14:33:02,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:33:02,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:33:02,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138262181] [2020-10-27 14:33:02,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:33:02,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:33:02,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:33:02,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:33:02,623 INFO L87 Difference]: Start difference. First operand 577 states and 753 transitions. Second operand 11 states. [2020-10-27 14:33:02,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:33:02,769 INFO L93 Difference]: Finished difference Result 1136 states and 1488 transitions. [2020-10-27 14:33:02,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:33:02,770 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 95 [2020-10-27 14:33:02,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:33:02,774 INFO L225 Difference]: With dead ends: 1136 [2020-10-27 14:33:02,774 INFO L226 Difference]: Without dead ends: 580 [2020-10-27 14:33:02,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:33:02,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2020-10-27 14:33:02,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 579. [2020-10-27 14:33:02,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 579 states. [2020-10-27 14:33:02,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 755 transitions. [2020-10-27 14:33:02,808 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 755 transitions. Word has length 95 [2020-10-27 14:33:02,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:33:02,809 INFO L481 AbstractCegarLoop]: Abstraction has 579 states and 755 transitions. [2020-10-27 14:33:02,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:33:02,809 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 755 transitions. [2020-10-27 14:33:02,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-27 14:33:02,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:33:02,813 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:33:02,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 14:33:02,813 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:33:02,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:33:02,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1456396168, now seen corresponding path program 14 times [2020-10-27 14:33:02,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:33:02,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357785839] [2020-10-27 14:33:02,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:33:02,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:02,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:02,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:03,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:07,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:07,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 14:33:07,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:33:07,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:33:07,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:07,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:33:07,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:33:07,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 14:33:07,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:08,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:33:08,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:08,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:08,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:08,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:33:08,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:33:08,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:33:08,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:08,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:33:08,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:33:08,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:33:08,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:08,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-27 14:33:08,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:08,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:08,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:08,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:33:08,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:33:08,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:33:08,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:08,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:33:08,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:33:08,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:33:08,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:08,273 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 2 proven. 532 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-27 14:33:08,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357785839] [2020-10-27 14:33:08,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:33:08,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:33:08,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942720661] [2020-10-27 14:33:08,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:33:08,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:33:08,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:33:08,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:33:08,275 INFO L87 Difference]: Start difference. First operand 579 states and 755 transitions. Second operand 23 states. [2020-10-27 14:33:08,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:33:08,651 INFO L93 Difference]: Finished difference Result 714 states and 933 transitions. [2020-10-27 14:33:08,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:33:08,651 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 97 [2020-10-27 14:33:08,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:33:08,655 INFO L225 Difference]: With dead ends: 714 [2020-10-27 14:33:08,656 INFO L226 Difference]: Without dead ends: 627 [2020-10-27 14:33:08,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:33:08,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2020-10-27 14:33:08,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 606. [2020-10-27 14:33:08,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 606 states. [2020-10-27 14:33:08,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 791 transitions. [2020-10-27 14:33:08,686 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 791 transitions. Word has length 97 [2020-10-27 14:33:08,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:33:08,686 INFO L481 AbstractCegarLoop]: Abstraction has 606 states and 791 transitions. [2020-10-27 14:33:08,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:33:08,686 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 791 transitions. [2020-10-27 14:33:08,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-27 14:33:08,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:33:08,688 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:33:08,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 14:33:08,689 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:33:08,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:33:08,689 INFO L82 PathProgramCache]: Analyzing trace with hash -36099680, now seen corresponding path program 15 times [2020-10-27 14:33:08,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:33:08,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976964698] [2020-10-27 14:33:08,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:33:08,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:08,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:08,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:13,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:13,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-27 14:33:13,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:33:13,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-27 14:33:13,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:13,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:33:13,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:33:13,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 14:33:13,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:14,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:33:14,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:14,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:14,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:14,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:33:14,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:33:14,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:33:14,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:14,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:33:14,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:33:14,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:33:14,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:14,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-10-27 14:33:14,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:14,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:14,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:14,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:33:14,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:33:14,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:33:14,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:14,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:33:14,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:33:14,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:33:14,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:33:14,296 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 2 proven. 590 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-27 14:33:14,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976964698] [2020-10-27 14:33:14,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:33:14,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 14:33:14,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074887563] [2020-10-27 14:33:14,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 14:33:14,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:33:14,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 14:33:14,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:33:14,301 INFO L87 Difference]: Start difference. First operand 606 states and 791 transitions. Second operand 24 states. [2020-10-27 14:33:14,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:33:14,673 INFO L93 Difference]: Finished difference Result 741 states and 969 transitions. [2020-10-27 14:33:14,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:33:14,674 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 100 [2020-10-27 14:33:14,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:33:14,677 INFO L225 Difference]: With dead ends: 741 [2020-10-27 14:33:14,678 INFO L226 Difference]: Without dead ends: 654 [2020-10-27 14:33:14,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:33:14,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2020-10-27 14:33:14,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 633. [2020-10-27 14:33:14,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 633 states. [2020-10-27 14:33:14,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 827 transitions. [2020-10-27 14:33:14,706 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 827 transitions. Word has length 100 [2020-10-27 14:33:14,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:33:14,707 INFO L481 AbstractCegarLoop]: Abstraction has 633 states and 827 transitions. [2020-10-27 14:33:14,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 14:33:14,707 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 827 transitions. [2020-10-27 14:33:14,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-27 14:33:14,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:33:14,709 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:33:14,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 14:33:14,709 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:33:14,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:33:14,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1478459256, now seen corresponding path program 16 times [2020-10-27 14:33:14,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:33:14,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653531051] [2020-10-27 14:33:14,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:33:14,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:14,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:14,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:19,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:19,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-27 14:33:19,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:33:19,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-27 14:33:19,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:19,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:33:19,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:33:19,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:33:19,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:19,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:33:19,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:19,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:19,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:19,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:33:19,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:33:19,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:33:19,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:19,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:33:19,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:33:19,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:33:19,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:19,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-27 14:33:19,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:19,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:19,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:19,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:33:19,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:33:19,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:33:19,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:19,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:33:19,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:33:19,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:33:19,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:19,899 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 653 trivial. 0 not checked. [2020-10-27 14:33:19,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653531051] [2020-10-27 14:33:19,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:33:19,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:33:19,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218708955] [2020-10-27 14:33:19,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:33:19,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:33:19,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:33:19,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:33:19,901 INFO L87 Difference]: Start difference. First operand 633 states and 827 transitions. Second operand 12 states. [2020-10-27 14:33:20,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:33:20,069 INFO L93 Difference]: Finished difference Result 1246 states and 1634 transitions. [2020-10-27 14:33:20,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:33:20,069 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 103 [2020-10-27 14:33:20,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:33:20,073 INFO L225 Difference]: With dead ends: 1246 [2020-10-27 14:33:20,073 INFO L226 Difference]: Without dead ends: 636 [2020-10-27 14:33:20,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:33:20,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2020-10-27 14:33:20,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 635. [2020-10-27 14:33:20,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 635 states. [2020-10-27 14:33:20,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 829 transitions. [2020-10-27 14:33:20,100 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 829 transitions. Word has length 103 [2020-10-27 14:33:20,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:33:20,101 INFO L481 AbstractCegarLoop]: Abstraction has 635 states and 829 transitions. [2020-10-27 14:33:20,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:33:20,101 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 829 transitions. [2020-10-27 14:33:20,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-27 14:33:20,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:33:20,103 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:33:20,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 14:33:20,103 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:33:20,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:33:20,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1888892698, now seen corresponding path program 17 times [2020-10-27 14:33:20,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:33:20,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737295404] [2020-10-27 14:33:20,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:33:20,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:20,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:20,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:25,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:25,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 14:33:25,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:33:25,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:33:25,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:25,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:33:25,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:33:25,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:33:25,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:25,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:33:25,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:25,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:25,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:25,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:33:25,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:33:25,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:33:25,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:25,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:33:25,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:33:25,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:33:25,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:25,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-27 14:33:25,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:25,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:25,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:25,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:33:25,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:33:25,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:33:25,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:25,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:33:25,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:33:25,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:33:25,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:25,325 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 653 trivial. 0 not checked. [2020-10-27 14:33:25,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737295404] [2020-10-27 14:33:25,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:33:25,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:33:25,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301300106] [2020-10-27 14:33:25,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:33:25,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:33:25,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:33:25,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:33:25,327 INFO L87 Difference]: Start difference. First operand 635 states and 829 transitions. Second operand 13 states. [2020-10-27 14:33:25,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:33:25,466 INFO L93 Difference]: Finished difference Result 1248 states and 1636 transitions. [2020-10-27 14:33:25,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:33:25,466 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 105 [2020-10-27 14:33:25,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:33:25,469 INFO L225 Difference]: With dead ends: 1248 [2020-10-27 14:33:25,470 INFO L226 Difference]: Without dead ends: 638 [2020-10-27 14:33:25,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:33:25,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2020-10-27 14:33:25,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 637. [2020-10-27 14:33:25,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 637 states. [2020-10-27 14:33:25,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 831 transitions. [2020-10-27 14:33:25,497 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 831 transitions. Word has length 105 [2020-10-27 14:33:25,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:33:25,497 INFO L481 AbstractCegarLoop]: Abstraction has 637 states and 831 transitions. [2020-10-27 14:33:25,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:33:25,498 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 831 transitions. [2020-10-27 14:33:25,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-27 14:33:25,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:33:25,500 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:33:25,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 14:33:25,500 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:33:25,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:33:25,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1178439228, now seen corresponding path program 18 times [2020-10-27 14:33:25,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:33:25,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458729442] [2020-10-27 14:33:25,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:33:25,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:25,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:25,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:30,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:30,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-27 14:33:30,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:33:30,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-27 14:33:30,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:30,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 14:33:30,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:33:30,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-27 14:33:30,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:31,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:33:31,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:31,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:31,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:31,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:33:31,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:33:31,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:33:31,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:31,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:33:31,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:33:31,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:33:31,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:31,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-10-27 14:33:31,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:31,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:31,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:31,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:33:31,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:33:31,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:33:31,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:31,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:33:31,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:33:31,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:33:31,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:31,055 INFO L134 CoverageAnalysis]: Checked inductivity of 755 backedges. 2 proven. 651 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-10-27 14:33:31,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458729442] [2020-10-27 14:33:31,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:33:31,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:33:31,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843257725] [2020-10-27 14:33:31,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:33:31,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:33:31,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:33:31,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:33:31,059 INFO L87 Difference]: Start difference. First operand 637 states and 831 transitions. Second operand 25 states. [2020-10-27 14:33:31,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:33:31,401 INFO L93 Difference]: Finished difference Result 772 states and 1009 transitions. [2020-10-27 14:33:31,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:33:31,402 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 107 [2020-10-27 14:33:31,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:33:31,406 INFO L225 Difference]: With dead ends: 772 [2020-10-27 14:33:31,406 INFO L226 Difference]: Without dead ends: 685 [2020-10-27 14:33:31,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:33:31,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2020-10-27 14:33:31,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 664. [2020-10-27 14:33:31,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 664 states. [2020-10-27 14:33:31,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 867 transitions. [2020-10-27 14:33:31,432 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 867 transitions. Word has length 107 [2020-10-27 14:33:31,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:33:31,432 INFO L481 AbstractCegarLoop]: Abstraction has 664 states and 867 transitions. [2020-10-27 14:33:31,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:33:31,433 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 867 transitions. [2020-10-27 14:33:31,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-27 14:33:31,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:33:31,435 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:33:31,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 14:33:31,435 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:33:31,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:33:31,435 INFO L82 PathProgramCache]: Analyzing trace with hash 404919780, now seen corresponding path program 19 times [2020-10-27 14:33:31,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:33:31,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12385315] [2020-10-27 14:33:31,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:33:31,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:31,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:31,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:36,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:36,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-27 14:33:36,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:33:36,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 14:33:36,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:36,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 14:33:36,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:33:36,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-27 14:33:36,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:36,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:33:36,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:36,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:36,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:36,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:33:36,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:33:36,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:33:36,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:36,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:33:36,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:33:36,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:33:36,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:36,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-10-27 14:33:36,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:36,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:36,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:36,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:33:36,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:33:36,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:33:36,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:36,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:33:36,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:33:36,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:33:36,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:36,993 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 2 proven. 715 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-10-27 14:33:36,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12385315] [2020-10-27 14:33:36,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:33:36,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 14:33:36,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274207837] [2020-10-27 14:33:36,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 14:33:36,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:33:36,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 14:33:36,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:33:36,995 INFO L87 Difference]: Start difference. First operand 664 states and 867 transitions. Second operand 26 states. [2020-10-27 14:33:37,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:33:37,347 INFO L93 Difference]: Finished difference Result 799 states and 1045 transitions. [2020-10-27 14:33:37,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:33:37,348 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 110 [2020-10-27 14:33:37,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:33:37,352 INFO L225 Difference]: With dead ends: 799 [2020-10-27 14:33:37,352 INFO L226 Difference]: Without dead ends: 712 [2020-10-27 14:33:37,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:33:37,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2020-10-27 14:33:37,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 691. [2020-10-27 14:33:37,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 691 states. [2020-10-27 14:33:37,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 903 transitions. [2020-10-27 14:33:37,382 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 903 transitions. Word has length 110 [2020-10-27 14:33:37,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:33:37,382 INFO L481 AbstractCegarLoop]: Abstraction has 691 states and 903 transitions. [2020-10-27 14:33:37,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 14:33:37,382 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 903 transitions. [2020-10-27 14:33:37,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-27 14:33:37,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:33:37,385 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:33:37,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 14:33:37,385 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:33:37,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:33:37,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1372684860, now seen corresponding path program 20 times [2020-10-27 14:33:37,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:33:37,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198767672] [2020-10-27 14:33:37,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:33:37,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:37,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:37,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:42,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:42,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-27 14:33:42,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:33:42,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:33:42,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:42,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:33:42,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:33:42,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-27 14:33:42,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:42,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:33:42,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:42,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:42,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:42,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:33:42,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:33:42,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:33:42,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:42,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:33:42,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:33:42,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:33:42,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:42,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-10-27 14:33:42,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:42,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:42,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:42,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:33:42,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:33:42,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:33:42,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:42,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:33:42,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:33:42,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:33:42,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:42,970 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 2 proven. 782 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-10-27 14:33:42,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198767672] [2020-10-27 14:33:42,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:33:42,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:33:42,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186898423] [2020-10-27 14:33:42,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:33:42,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:33:42,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:33:42,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:33:42,972 INFO L87 Difference]: Start difference. First operand 691 states and 903 transitions. Second operand 27 states. [2020-10-27 14:33:43,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:33:43,395 INFO L93 Difference]: Finished difference Result 826 states and 1081 transitions. [2020-10-27 14:33:43,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:33:43,395 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 113 [2020-10-27 14:33:43,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:33:43,400 INFO L225 Difference]: With dead ends: 826 [2020-10-27 14:33:43,400 INFO L226 Difference]: Without dead ends: 739 [2020-10-27 14:33:43,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:33:43,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2020-10-27 14:33:43,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 718. [2020-10-27 14:33:43,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 718 states. [2020-10-27 14:33:43,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 939 transitions. [2020-10-27 14:33:43,427 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 939 transitions. Word has length 113 [2020-10-27 14:33:43,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:33:43,428 INFO L481 AbstractCegarLoop]: Abstraction has 718 states and 939 transitions. [2020-10-27 14:33:43,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:33:43,428 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 939 transitions. [2020-10-27 14:33:43,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-27 14:33:43,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:33:43,430 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:33:43,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 14:33:43,431 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:33:43,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:33:43,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1045755420, now seen corresponding path program 21 times [2020-10-27 14:33:43,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:33:43,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873770219] [2020-10-27 14:33:43,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:33:43,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:43,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:43,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:48,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:48,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-27 14:33:48,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:33:48,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 14:33:48,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:48,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:33:48,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:33:48,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:33:48,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:48,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:33:48,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:48,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:48,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:48,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:33:48,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:33:48,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:33:48,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:48,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:33:48,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:33:48,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:33:48,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:48,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-10-27 14:33:48,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:48,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:48,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:48,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:33:48,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:33:48,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:33:48,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:48,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:33:48,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:33:48,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:33:48,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:48,641 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2020-10-27 14:33:48,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873770219] [2020-10-27 14:33:48,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:33:48,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:33:48,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889945820] [2020-10-27 14:33:48,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:33:48,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:33:48,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:33:48,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:33:48,643 INFO L87 Difference]: Start difference. First operand 718 states and 939 transitions. Second operand 14 states. [2020-10-27 14:33:48,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:33:48,776 INFO L93 Difference]: Finished difference Result 1412 states and 1854 transitions. [2020-10-27 14:33:48,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:33:48,777 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 116 [2020-10-27 14:33:48,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:33:48,780 INFO L225 Difference]: With dead ends: 1412 [2020-10-27 14:33:48,780 INFO L226 Difference]: Without dead ends: 721 [2020-10-27 14:33:48,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:33:48,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2020-10-27 14:33:48,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 720. [2020-10-27 14:33:48,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 720 states. [2020-10-27 14:33:48,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 941 transitions. [2020-10-27 14:33:48,835 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 941 transitions. Word has length 116 [2020-10-27 14:33:48,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:33:48,835 INFO L481 AbstractCegarLoop]: Abstraction has 720 states and 941 transitions. [2020-10-27 14:33:48,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:33:48,835 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 941 transitions. [2020-10-27 14:33:48,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-27 14:33:48,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:33:48,839 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:33:48,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 14:33:48,839 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:33:48,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:33:48,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1894173254, now seen corresponding path program 22 times [2020-10-27 14:33:48,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:33:48,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181794001] [2020-10-27 14:33:48,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:33:48,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:48,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:49,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:53,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:53,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-27 14:33:53,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:33:53,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5070 [2020-10-27 14:33:53,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:53,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 14:33:53,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:33:53,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-27 14:33:53,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:54,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:33:54,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:54,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:54,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:54,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:33:54,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:33:54,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:33:54,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:54,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:33:54,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:33:54,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:33:54,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:54,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-10-27 14:33:54,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:54,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:54,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:54,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:33:54,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:33:54,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:33:54,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:54,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:33:54,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:33:54,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:33:54,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:54,513 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 2 proven. 852 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2020-10-27 14:33:54,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181794001] [2020-10-27 14:33:54,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:33:54,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 14:33:54,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762126259] [2020-10-27 14:33:54,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 14:33:54,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:33:54,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 14:33:54,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:33:54,515 INFO L87 Difference]: Start difference. First operand 720 states and 941 transitions. Second operand 28 states. [2020-10-27 14:33:54,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:33:54,924 INFO L93 Difference]: Finished difference Result 855 states and 1119 transitions. [2020-10-27 14:33:54,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:33:54,925 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 118 [2020-10-27 14:33:54,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:33:54,929 INFO L225 Difference]: With dead ends: 855 [2020-10-27 14:33:54,929 INFO L226 Difference]: Without dead ends: 768 [2020-10-27 14:33:54,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:33:54,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2020-10-27 14:33:54,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 747. [2020-10-27 14:33:54,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 747 states. [2020-10-27 14:33:54,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 977 transitions. [2020-10-27 14:33:54,952 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 977 transitions. Word has length 118 [2020-10-27 14:33:54,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:33:54,952 INFO L481 AbstractCegarLoop]: Abstraction has 747 states and 977 transitions. [2020-10-27 14:33:54,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 14:33:54,952 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 977 transitions. [2020-10-27 14:33:54,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-27 14:33:54,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:33:54,955 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:33:54,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 14:33:54,955 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:33:54,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:33:54,955 INFO L82 PathProgramCache]: Analyzing trace with hash -2034608606, now seen corresponding path program 23 times [2020-10-27 14:33:54,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:33:54,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695213340] [2020-10-27 14:33:54,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:33:54,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:55,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:55,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:00,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:00,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-27 14:34:00,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:34:00,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 14:34:00,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:00,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 14:34:00,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:34:00,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-27 14:34:00,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:00,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:00,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:00,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:00,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:00,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:00,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:00,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:34:00,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:00,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:00,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:00,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:00,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:00,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-10-27 14:34:00,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:00,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:00,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:00,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:34:00,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:00,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:34:00,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:00,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:00,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:34:00,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:00,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:00,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 2 proven. 925 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2020-10-27 14:34:00,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695213340] [2020-10-27 14:34:00,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:34:00,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 14:34:00,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240637915] [2020-10-27 14:34:00,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 14:34:00,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:00,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 14:34:00,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:34:00,625 INFO L87 Difference]: Start difference. First operand 747 states and 977 transitions. Second operand 29 states. [2020-10-27 14:34:01,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:01,100 INFO L93 Difference]: Finished difference Result 882 states and 1155 transitions. [2020-10-27 14:34:01,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:34:01,101 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 121 [2020-10-27 14:34:01,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:01,104 INFO L225 Difference]: With dead ends: 882 [2020-10-27 14:34:01,104 INFO L226 Difference]: Without dead ends: 795 [2020-10-27 14:34:01,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:34:01,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2020-10-27 14:34:01,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 774. [2020-10-27 14:34:01,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 774 states. [2020-10-27 14:34:01,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1013 transitions. [2020-10-27 14:34:01,128 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1013 transitions. Word has length 121 [2020-10-27 14:34:01,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:01,128 INFO L481 AbstractCegarLoop]: Abstraction has 774 states and 1013 transitions. [2020-10-27 14:34:01,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 14:34:01,129 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1013 transitions. [2020-10-27 14:34:01,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-27 14:34:01,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:01,131 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:01,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 14:34:01,132 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:01,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:01,132 INFO L82 PathProgramCache]: Analyzing trace with hash 2073750726, now seen corresponding path program 24 times [2020-10-27 14:34:01,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:01,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68982029] [2020-10-27 14:34:01,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:01,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:01,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:01,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:06,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:06,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-27 14:34:06,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:34:06,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:34:06,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:06,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:34:06,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:34:06,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 14:34:06,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:06,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:06,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:06,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:06,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:06,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:06,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:06,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:34:06,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:06,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:06,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:06,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:06,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:06,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-10-27 14:34:06,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:06,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:06,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:06,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:34:06,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:06,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:34:06,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:06,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:06,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:34:06,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:06,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:06,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1126 backedges. 2 proven. 121 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2020-10-27 14:34:06,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68982029] [2020-10-27 14:34:06,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:34:06,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:34:06,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712626113] [2020-10-27 14:34:06,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:34:06,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:06,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:34:06,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:34:06,365 INFO L87 Difference]: Start difference. First operand 774 states and 1013 transitions. Second operand 15 states. [2020-10-27 14:34:06,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:06,568 INFO L93 Difference]: Finished difference Result 1522 states and 2000 transitions. [2020-10-27 14:34:06,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:34:06,568 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 124 [2020-10-27 14:34:06,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:06,572 INFO L225 Difference]: With dead ends: 1522 [2020-10-27 14:34:06,572 INFO L226 Difference]: Without dead ends: 777 [2020-10-27 14:34:06,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:34:06,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2020-10-27 14:34:06,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 776. [2020-10-27 14:34:06,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-10-27 14:34:06,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1015 transitions. [2020-10-27 14:34:06,595 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1015 transitions. Word has length 124 [2020-10-27 14:34:06,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:06,595 INFO L481 AbstractCegarLoop]: Abstraction has 776 states and 1015 transitions. [2020-10-27 14:34:06,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:34:06,595 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1015 transitions. [2020-10-27 14:34:06,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-27 14:34:06,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:06,597 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:06,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 14:34:06,597 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:06,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:06,598 INFO L82 PathProgramCache]: Analyzing trace with hash -716625112, now seen corresponding path program 25 times [2020-10-27 14:34:06,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:06,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112836619] [2020-10-27 14:34:06,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:06,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:06,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:06,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking...