/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_copy1_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:15:07,631 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:15:07,634 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:15:07,671 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:15:07,672 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:15:07,674 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:15:07,676 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:15:07,678 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:15:07,681 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:15:07,682 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:15:07,684 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:15:07,686 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:15:07,686 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:15:07,688 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:15:07,690 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:15:07,691 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:15:07,702 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:15:07,703 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:15:07,705 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:15:07,707 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:15:07,709 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:15:07,711 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:15:07,713 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:15:07,714 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:15:07,717 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:15:07,718 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:15:07,718 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:15:07,720 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:15:07,720 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:15:07,721 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:15:07,722 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:15:07,723 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:15:07,724 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:15:07,725 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:15:07,726 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:15:07,727 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:15:07,728 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:15:07,728 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:15:07,728 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:15:07,730 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:15:07,731 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:15:07,732 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 14:15:07,763 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:15:07,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:15:07,770 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:15:07,771 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:15:07,771 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:15:07,771 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:15:07,771 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:15:07,771 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:15:07,772 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:15:07,772 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:15:07,772 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:15:07,772 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:15:07,772 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:15:07,773 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:15:07,774 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:15:07,774 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:15:07,775 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:15:07,775 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:15:07,775 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:15:07,776 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:15:07,776 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:15:07,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:15:07,777 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:15:07,777 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:15:07,777 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:15:07,777 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:15:07,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:15:07,778 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:15:07,778 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:15:07,779 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:15:08,257 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:15:08,312 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:15:08,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:15:08,319 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:15:08,319 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:15:08,321 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy1_ground-1.i [2020-10-27 14:15:08,416 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cb2dea7ce/99f46c379f88490d97ea30b6853438b9/FLAG687e7b014 [2020-10-27 14:15:09,045 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:15:09,046 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy1_ground-1.i [2020-10-27 14:15:09,056 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cb2dea7ce/99f46c379f88490d97ea30b6853438b9/FLAG687e7b014 [2020-10-27 14:15:09,427 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cb2dea7ce/99f46c379f88490d97ea30b6853438b9 [2020-10-27 14:15:09,430 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:15:09,437 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:15:09,439 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:15:09,439 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:15:09,443 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:15:09,444 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:15:09" (1/1) ... [2020-10-27 14:15:09,448 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d84d025 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:15:09, skipping insertion in model container [2020-10-27 14:15:09,449 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:15:09" (1/1) ... [2020-10-27 14:15:09,457 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:15:09,474 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:15:09,643 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:15:09,653 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:15:09,674 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:15:09,692 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:15:09,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:15:09 WrapperNode [2020-10-27 14:15:09,693 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:15:09,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:15:09,694 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:15:09,694 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:15:09,708 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:15:09" (1/1) ... [2020-10-27 14:15:09,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:15:09" (1/1) ... [2020-10-27 14:15:09,717 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:15:09" (1/1) ... [2020-10-27 14:15:09,717 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:15:09" (1/1) ... [2020-10-27 14:15:09,725 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:15:09" (1/1) ... [2020-10-27 14:15:09,731 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:15:09" (1/1) ... [2020-10-27 14:15:09,733 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:15:09" (1/1) ... [2020-10-27 14:15:09,735 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:15:09,737 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:15:09,737 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:15:09,737 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:15:09,738 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:15:09" (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 14:15:09,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:15:09,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:15:09,812 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:15:09,812 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:15:09,812 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:15:09,812 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:15:09,812 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:15:09,812 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 14:15:09,812 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 14:15:09,813 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:15:09,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:15:09,813 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:15:09,813 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:15:09,813 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:15:09,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:15:09,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:15:09,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:15:09,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:15:09,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:15:09,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:15:10,098 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:15:10,098 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-27 14:15:10,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:15:10 BoogieIcfgContainer [2020-10-27 14:15:10,100 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:15:10,102 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:15:10,103 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:15:10,106 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:15:10,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:15:09" (1/3) ... [2020-10-27 14:15:10,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5afa8787 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:15:10, skipping insertion in model container [2020-10-27 14:15:10,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:15:09" (2/3) ... [2020-10-27 14:15:10,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5afa8787 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:15:10, skipping insertion in model container [2020-10-27 14:15:10,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:15:10" (3/3) ... [2020-10-27 14:15:10,111 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy1_ground-1.i [2020-10-27 14:15:10,128 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:15:10,142 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:15:10,186 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:15:10,247 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:15:10,247 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:15:10,247 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:15:10,248 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:15:10,248 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:15:10,248 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:15:10,248 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:15:10,248 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:15:10,269 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-27 14:15:10,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 14:15:10,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:10,277 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:10,277 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:10,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:10,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1906025394, now seen corresponding path program 1 times [2020-10-27 14:15:10,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:10,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757181046] [2020-10-27 14:15:10,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:10,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:10,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:10,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:10,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:10,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 14:15:10,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:15:10,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 277 [2020-10-27 14:15:10,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:10,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:10,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:15:10,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:10,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 14:15:10,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:10,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:10,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:10,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:10,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:10,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:10,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 14:15:10,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:10,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:10,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:10,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:10,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:10,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:10,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757181046] [2020-10-27 14:15:10,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:15:10,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:15:10,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957617814] [2020-10-27 14:15:10,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:15:10,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:10,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:15:10,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:15:10,937 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-10-27 14:15:11,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:11,048 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-10-27 14:15:11,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:15:11,050 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-27 14:15:11,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:11,060 INFO L225 Difference]: With dead ends: 53 [2020-10-27 14:15:11,060 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 14:15:11,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:15:11,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 14:15:11,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-27 14:15:11,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 14:15:11,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-27 14:15:11,114 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2020-10-27 14:15:11,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:11,115 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-27 14:15:11,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:15:11,115 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-27 14:15:11,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 14:15:11,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:11,117 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:11,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:15:11,117 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:11,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:11,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1754426942, now seen corresponding path program 1 times [2020-10-27 14:15:11,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:11,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845968874] [2020-10-27 14:15:11,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:11,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:11,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:11,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:11,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:11,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 14:15:11,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:15:11,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-10-27 14:15:11,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:11,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:15:11,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:15:11,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 14:15:11,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:11,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:11,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:11,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:11,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:11,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:11,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:11,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 14:15:11,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:11,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:11,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:11,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:11,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:15:11,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:11,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845968874] [2020-10-27 14:15:11,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:15:11,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:15:11,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998924547] [2020-10-27 14:15:11,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:15:11,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:11,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:15:11,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:15:11,462 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 4 states. [2020-10-27 14:15:11,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:11,548 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-10-27 14:15:11,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:15:11,549 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-27 14:15:11,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:11,550 INFO L225 Difference]: With dead ends: 39 [2020-10-27 14:15:11,550 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 14:15:11,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:15:11,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 14:15:11,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-27 14:15:11,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 14:15:11,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-27 14:15:11,562 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 17 [2020-10-27 14:15:11,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:11,563 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-27 14:15:11,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:15:11,563 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-27 14:15:11,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 14:15:11,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:11,564 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 14:15:11,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:15:11,565 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:11,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:11,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1373994528, now seen corresponding path program 1 times [2020-10-27 14:15:11,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:11,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649401044] [2020-10-27 14:15:11,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:11,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:11,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:11,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:11,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:12,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:12,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 14:15:12,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:15:12,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 991 [2020-10-27 14:15:12,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:12,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:15:12,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:15:12,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 14:15:12,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:15:12,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:12,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:12,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:12,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:12,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:12,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:12,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:15:12,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:12,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:12,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:12,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:12,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:12,677 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 14:15:12,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649401044] [2020-10-27 14:15:12,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:12,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 14:15:12,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688309542] [2020-10-27 14:15:12,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:15:12,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:12,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:15:12,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:15:12,680 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 5 states. [2020-10-27 14:15:12,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:12,763 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2020-10-27 14:15:12,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:15:12,764 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-27 14:15:12,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:12,765 INFO L225 Difference]: With dead ends: 41 [2020-10-27 14:15:12,765 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 14:15:12,766 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 14:15:12,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 14:15:12,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-27 14:15:12,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 14:15:12,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-27 14:15:12,773 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 19 [2020-10-27 14:15:12,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:12,774 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-27 14:15:12,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:15:12,774 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-27 14:15:12,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 14:15:12,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:12,775 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:12,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:15:12,776 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:12,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:12,777 INFO L82 PathProgramCache]: Analyzing trace with hash -850664834, now seen corresponding path program 2 times [2020-10-27 14:15:12,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:12,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804987560] [2020-10-27 14:15:12,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:12,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:12,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:12,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:12,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:13,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:13,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 14:15:13,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:15:13,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 701 [2020-10-27 14:15:13,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:13,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:15:13,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:15:13,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:15:13,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:13,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:13,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:13,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:13,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:13,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:13,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:13,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:15:13,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:13,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:13,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:13,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:13,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:13,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:13,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804987560] [2020-10-27 14:15:13,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:13,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:15:13,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093728678] [2020-10-27 14:15:13,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:15:13,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:13,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:15:13,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:15:13,561 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 6 states. [2020-10-27 14:15:13,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:13,645 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2020-10-27 14:15:13,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:15:13,645 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-27 14:15:13,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:13,646 INFO L225 Difference]: With dead ends: 43 [2020-10-27 14:15:13,646 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 14:15:13,647 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 14:15:13,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 14:15:13,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-27 14:15:13,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 14:15:13,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-27 14:15:13,655 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 21 [2020-10-27 14:15:13,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:13,655 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-27 14:15:13,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:15:13,656 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-27 14:15:13,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 14:15:13,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:13,657 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:13,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:15:13,657 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:13,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:13,658 INFO L82 PathProgramCache]: Analyzing trace with hash -442002532, now seen corresponding path program 3 times [2020-10-27 14:15:13,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:13,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848125928] [2020-10-27 14:15:13,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:13,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:13,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:13,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:13,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:14,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:14,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 14:15:14,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:15:14,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1129 [2020-10-27 14:15:14,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:14,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:15:14,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:15:14,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 14:15:14,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:14,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:14,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:14,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:14,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:14,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:14,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:14,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:15:14,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:14,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:14,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:14,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:14,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:14,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:14,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848125928] [2020-10-27 14:15:14,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:14,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:15:14,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499262823] [2020-10-27 14:15:14,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:15:14,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:14,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:15:14,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:15:14,881 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 7 states. [2020-10-27 14:15:14,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:14,973 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2020-10-27 14:15:14,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:15:14,974 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-27 14:15:14,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:14,975 INFO L225 Difference]: With dead ends: 45 [2020-10-27 14:15:14,975 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 14:15:14,976 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 14:15:14,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 14:15:14,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-27 14:15:14,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 14:15:14,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-27 14:15:14,984 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 23 [2020-10-27 14:15:14,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:14,984 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-27 14:15:14,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:15:14,985 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-27 14:15:14,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 14:15:14,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:14,986 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:14,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:15:14,986 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:14,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:14,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1440445754, now seen corresponding path program 4 times [2020-10-27 14:15:14,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:14,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151211742] [2020-10-27 14:15:14,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:14,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:15,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:15,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:15,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:16,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:16,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 14:15:16,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:15:16,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1099 [2020-10-27 14:15:16,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:16,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:15:16,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:15:16,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 14:15:16,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:16,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:16,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:16,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:16,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:16,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:16,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:16,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:15:16,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:16,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:16,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:16,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:16,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:16,182 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:16,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151211742] [2020-10-27 14:15:16,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:16,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:15:16,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21164532] [2020-10-27 14:15:16,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:15:16,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:16,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:15:16,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:15:16,185 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 8 states. [2020-10-27 14:15:16,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:16,284 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2020-10-27 14:15:16,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 14:15:16,285 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-27 14:15:16,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:16,286 INFO L225 Difference]: With dead ends: 47 [2020-10-27 14:15:16,286 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 14:15:16,286 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 14:15:16,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 14:15:16,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-27 14:15:16,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 14:15:16,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-27 14:15:16,293 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 25 [2020-10-27 14:15:16,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:16,293 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-27 14:15:16,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:15:16,293 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-27 14:15:16,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 14:15:16,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:16,295 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:16,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:15:16,295 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:16,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:16,296 INFO L82 PathProgramCache]: Analyzing trace with hash -2002950312, now seen corresponding path program 5 times [2020-10-27 14:15:16,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:16,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838635465] [2020-10-27 14:15:16,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:16,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:16,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:16,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:16,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:17,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:17,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 14:15:17,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:15:17,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1520 [2020-10-27 14:15:17,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:17,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:15:17,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:15:17,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:15:17,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:17,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:17,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:17,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:17,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:17,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:17,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:17,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:15:17,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:17,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:17,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:17,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:17,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:17,921 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:17,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838635465] [2020-10-27 14:15:17,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:17,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:15:17,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407376011] [2020-10-27 14:15:17,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:15:17,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:17,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:15:17,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:15:17,924 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 9 states. [2020-10-27 14:15:18,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:18,031 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2020-10-27 14:15:18,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:15:18,032 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-27 14:15:18,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:18,033 INFO L225 Difference]: With dead ends: 49 [2020-10-27 14:15:18,033 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 14:15:18,034 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 14:15:18,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 14:15:18,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-27 14:15:18,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 14:15:18,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-27 14:15:18,041 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 27 [2020-10-27 14:15:18,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:18,042 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-27 14:15:18,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:15:18,042 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-27 14:15:18,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 14:15:18,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:18,043 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:18,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:15:18,044 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:18,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:18,044 INFO L82 PathProgramCache]: Analyzing trace with hash 313215478, now seen corresponding path program 6 times [2020-10-27 14:15:18,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:18,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016604977] [2020-10-27 14:15:18,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:18,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:18,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:18,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:18,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:20,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:20,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 14:15:20,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:15:20,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2109 [2020-10-27 14:15:20,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:20,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:15:20,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:15:20,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:15:20,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:15:20,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:20,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:20,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:20,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:20,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:20,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:20,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:15:20,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:20,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:20,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:20,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:20,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:20,269 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:20,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016604977] [2020-10-27 14:15:20,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:20,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:15:20,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705587188] [2020-10-27 14:15:20,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:15:20,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:20,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:15:20,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:15:20,286 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 10 states. [2020-10-27 14:15:20,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:20,412 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2020-10-27 14:15:20,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:15:20,413 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-27 14:15:20,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:20,414 INFO L225 Difference]: With dead ends: 51 [2020-10-27 14:15:20,414 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 14:15:20,415 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 14:15:20,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 14:15:20,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-27 14:15:20,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 14:15:20,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-27 14:15:20,421 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 29 [2020-10-27 14:15:20,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:20,422 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-27 14:15:20,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:15:20,422 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-27 14:15:20,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 14:15:20,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:20,423 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:20,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:15:20,423 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:20,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:20,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1355480340, now seen corresponding path program 7 times [2020-10-27 14:15:20,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:20,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860482689] [2020-10-27 14:15:20,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:20,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:20,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:20,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:20,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:23,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:23,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 14:15:23,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:15:23,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2664 [2020-10-27 14:15:23,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:23,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:15:23,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:15:23,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 14:15:23,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:15:23,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:23,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:23,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:23,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:23,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:23,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:23,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:15:23,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:23,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:23,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:23,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:23,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:23,234 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:23,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860482689] [2020-10-27 14:15:23,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:23,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:15:23,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674833723] [2020-10-27 14:15:23,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:15:23,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:23,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:15:23,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:15:23,243 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 11 states. [2020-10-27 14:15:23,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:23,395 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2020-10-27 14:15:23,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:15:23,395 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 14:15:23,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:23,397 INFO L225 Difference]: With dead ends: 53 [2020-10-27 14:15:23,397 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 14:15:23,397 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 14:15:23,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 14:15:23,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-27 14:15:23,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 14:15:23,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-27 14:15:23,413 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 31 [2020-10-27 14:15:23,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:23,413 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-27 14:15:23,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:15:23,414 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-27 14:15:23,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 14:15:23,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:23,417 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:23,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:15:23,418 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:23,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:23,420 INFO L82 PathProgramCache]: Analyzing trace with hash -2050334542, now seen corresponding path program 8 times [2020-10-27 14:15:23,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:23,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155615320] [2020-10-27 14:15:23,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:23,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:23,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:23,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:23,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:26,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:26,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 14:15:26,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:15:26,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3107 [2020-10-27 14:15:26,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:26,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:15:26,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:15:26,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:15:26,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:26,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:26,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:26,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:26,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:26,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:26,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:26,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:15:26,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:26,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:26,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:26,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:26,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:26,685 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:26,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155615320] [2020-10-27 14:15:26,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:26,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:15:26,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249391272] [2020-10-27 14:15:26,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:15:26,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:26,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:15:26,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:15:26,687 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 12 states. [2020-10-27 14:15:26,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:26,803 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2020-10-27 14:15:26,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:15:26,804 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-27 14:15:26,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:26,806 INFO L225 Difference]: With dead ends: 55 [2020-10-27 14:15:26,806 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 14:15:26,807 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 14:15:26,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 14:15:26,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-27 14:15:26,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 14:15:26,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-27 14:15:26,817 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 33 [2020-10-27 14:15:26,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:26,818 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-27 14:15:26,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:15:26,818 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-27 14:15:26,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 14:15:26,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:26,820 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:26,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:15:26,820 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:26,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:26,823 INFO L82 PathProgramCache]: Analyzing trace with hash 2021610704, now seen corresponding path program 9 times [2020-10-27 14:15:26,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:26,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114541688] [2020-10-27 14:15:26,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:26,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:26,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:26,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:27,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:30,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:30,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 14:15:30,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:15:30,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3545 [2020-10-27 14:15:30,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:30,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:15:30,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:15:30,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:15:30,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:30,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:30,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:30,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:30,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:30,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:30,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:30,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:15:30,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:30,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:30,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:30,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:30,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:30,534 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:30,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114541688] [2020-10-27 14:15:30,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:30,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:15:30,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469539109] [2020-10-27 14:15:30,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:15:30,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:30,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:15:30,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:15:30,538 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 13 states. [2020-10-27 14:15:30,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:30,627 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2020-10-27 14:15:30,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:15:30,628 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-27 14:15:30,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:30,629 INFO L225 Difference]: With dead ends: 57 [2020-10-27 14:15:30,629 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 14:15:30,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 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 14:15:30,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 14:15:30,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-27 14:15:30,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 14:15:30,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-27 14:15:30,639 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 35 [2020-10-27 14:15:30,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:30,640 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-27 14:15:30,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:15:30,640 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-27 14:15:30,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 14:15:30,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:30,641 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:30,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:15:30,644 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:30,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:30,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1849181842, now seen corresponding path program 10 times [2020-10-27 14:15:30,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:30,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668393685] [2020-10-27 14:15:30,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:30,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:30,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:30,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:30,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:34,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:34,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 14:15:34,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:15:34,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4284 [2020-10-27 14:15:34,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:34,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:15:34,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:15:34,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:15:34,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:35,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:35,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:35,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:35,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:35,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:35,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:35,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:15:35,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:35,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:35,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:35,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:35,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:35,102 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:35,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668393685] [2020-10-27 14:15:35,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:35,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:15:35,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407035897] [2020-10-27 14:15:35,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:15:35,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:35,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:15:35,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:15:35,105 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 14 states. [2020-10-27 14:15:35,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:35,220 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2020-10-27 14:15:35,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:15:35,221 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-10-27 14:15:35,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:35,223 INFO L225 Difference]: With dead ends: 59 [2020-10-27 14:15:35,223 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 14:15:35,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 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 14:15:35,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 14:15:35,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-27 14:15:35,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 14:15:35,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-27 14:15:35,238 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 37 [2020-10-27 14:15:35,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:35,239 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-27 14:15:35,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:15:35,239 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-27 14:15:35,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 14:15:35,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:35,240 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:35,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:15:35,241 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:35,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:35,243 INFO L82 PathProgramCache]: Analyzing trace with hash 2055827084, now seen corresponding path program 11 times [2020-10-27 14:15:35,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:35,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1500334984] [2020-10-27 14:15:35,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:35,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:35,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:35,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:35,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:39,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:39,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 14:15:39,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:15:39,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4515 [2020-10-27 14:15:39,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:39,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:15:39,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:15:39,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 14:15:39,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:39,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:39,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:39,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:39,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:39,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:39,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:39,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:15:39,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:39,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:39,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:39,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:39,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:39,953 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:39,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1500334984] [2020-10-27 14:15:39,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:39,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:15:39,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879840640] [2020-10-27 14:15:39,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:15:39,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:39,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:15:39,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:15:39,956 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 15 states. [2020-10-27 14:15:40,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:40,094 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2020-10-27 14:15:40,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:15:40,095 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-10-27 14:15:40,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:40,096 INFO L225 Difference]: With dead ends: 61 [2020-10-27 14:15:40,096 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 14:15:40,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 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 14:15:40,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 14:15:40,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-27 14:15:40,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 14:15:40,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-27 14:15:40,111 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 39 [2020-10-27 14:15:40,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:40,112 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-27 14:15:40,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:15:40,114 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-27 14:15:40,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 14:15:40,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:40,115 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:40,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:15:40,116 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:40,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:40,116 INFO L82 PathProgramCache]: Analyzing trace with hash 967988266, now seen corresponding path program 12 times [2020-10-27 14:15:40,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:40,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294011824] [2020-10-27 14:15:40,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:40,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:40,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:40,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:40,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:45,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:45,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 14:15:45,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:15:45,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4907 [2020-10-27 14:15:45,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:45,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:15:45,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:15:45,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:15:45,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:45,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:45,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:45,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:45,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:45,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:45,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:45,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:15:45,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:45,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:45,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:45,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:45,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:45,287 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:45,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294011824] [2020-10-27 14:15:45,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:45,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:15:45,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223385717] [2020-10-27 14:15:45,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:15:45,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:45,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:15:45,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:15:45,290 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 16 states. [2020-10-27 14:15:45,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:45,399 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2020-10-27 14:15:45,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:15:45,400 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2020-10-27 14:15:45,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:45,400 INFO L225 Difference]: With dead ends: 63 [2020-10-27 14:15:45,400 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 14:15:45,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:15:45,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 14:15:45,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-27 14:15:45,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 14:15:45,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-10-27 14:15:45,415 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 41 [2020-10-27 14:15:45,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:45,416 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-10-27 14:15:45,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:15:45,416 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-10-27 14:15:45,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 14:15:45,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:45,417 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:45,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:15:45,419 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:45,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:45,420 INFO L82 PathProgramCache]: Analyzing trace with hash -768062904, now seen corresponding path program 13 times [2020-10-27 14:15:45,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:45,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538824571] [2020-10-27 14:15:45,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:45,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:45,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:45,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:45,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:49,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:49,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 14:15:49,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:15:49,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4410 [2020-10-27 14:15:49,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:49,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:15:49,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:15:49,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 14:15:49,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:50,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:50,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:50,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:50,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:50,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:50,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:50,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:15:50,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:50,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:50,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:50,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:50,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:15:50,069 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:50,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538824571] [2020-10-27 14:15:50,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:50,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:15:50,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958333601] [2020-10-27 14:15:50,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:15:50,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:50,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:15:50,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:15:50,073 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 17 states. [2020-10-27 14:15:50,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:50,307 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2020-10-27 14:15:50,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:15:50,309 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2020-10-27 14:15:50,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:50,310 INFO L225 Difference]: With dead ends: 65 [2020-10-27 14:15:50,310 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 14:15:50,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:15:50,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 14:15:50,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-27 14:15:50,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 14:15:50,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-27 14:15:50,322 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 43 [2020-10-27 14:15:50,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:50,323 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-27 14:15:50,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:15:50,323 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-27 14:15:50,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:15:50,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:50,326 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:50,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:15:50,326 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:50,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:50,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1629040870, now seen corresponding path program 14 times [2020-10-27 14:15:50,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:50,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326389125] [2020-10-27 14:15:50,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:50,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:50,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:50,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:50,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:54,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:54,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 14:15:54,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:15:54,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4655 [2020-10-27 14:15:54,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:54,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:15:54,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:15:54,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 14:15:54,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:55,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:55,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:55,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:55,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:55,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:55,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:55,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:15:55,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:55,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:55,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:55,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:55,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:55,266 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:15:55,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326389125] [2020-10-27 14:15:55,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:55,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:15:55,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094423064] [2020-10-27 14:15:55,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:15:55,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:55,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:15:55,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:15:55,269 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 18 states. [2020-10-27 14:15:55,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:55,448 INFO L93 Difference]: Finished difference Result 67 states and 70 transitions. [2020-10-27 14:15:55,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:15:55,449 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-10-27 14:15:55,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:55,450 INFO L225 Difference]: With dead ends: 67 [2020-10-27 14:15:55,450 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 14:15:55,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 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 14:15:55,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 14:15:55,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-27 14:15:55,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 14:15:55,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-27 14:15:55,455 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 45 [2020-10-27 14:15:55,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:55,456 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-27 14:15:55,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:15:55,456 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-27 14:15:55,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 14:15:55,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:55,457 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:55,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:15:55,457 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:55,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:55,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1151670268, now seen corresponding path program 15 times [2020-10-27 14:15:55,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:55,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945518467] [2020-10-27 14:15:55,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:55,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:55,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:55,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:56,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:00,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:00,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:16:00,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:16:00,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:16:00,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:00,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:16:00,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:16:00,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:16:00,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:00,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:00,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:00,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:00,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:00,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:00,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:00,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:16:00,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:00,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:00,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:00,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:00,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:00,773 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:16:00,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945518467] [2020-10-27 14:16:00,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:00,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:16:00,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229203203] [2020-10-27 14:16:00,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:16:00,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:00,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:16:00,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:16:00,775 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 19 states. [2020-10-27 14:16:00,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:00,904 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2020-10-27 14:16:00,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:16:00,905 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2020-10-27 14:16:00,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:00,906 INFO L225 Difference]: With dead ends: 69 [2020-10-27 14:16:00,906 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 14:16:00,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 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 14:16:00,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 14:16:00,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-27 14:16:00,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 14:16:00,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-27 14:16:00,913 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 47 [2020-10-27 14:16:00,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:00,918 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-27 14:16:00,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:16:00,919 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-27 14:16:00,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 14:16:00,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:00,919 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:16:00,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:16:00,920 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:00,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:00,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1945415774, now seen corresponding path program 16 times [2020-10-27 14:16:00,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:00,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172038569] [2020-10-27 14:16:00,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:00,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:00,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:00,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:01,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:05,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:05,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 14:16:05,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:16:05,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:16:05,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:05,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:16:05,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:16:05,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 14:16:05,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:06,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:06,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:06,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:06,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:06,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:06,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:06,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:16:06,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:06,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:06,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:06,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:06,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:06,238 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:16:06,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172038569] [2020-10-27 14:16:06,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:06,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:16:06,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348313960] [2020-10-27 14:16:06,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:16:06,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:06,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:16:06,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:16:06,246 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 20 states. [2020-10-27 14:16:06,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:06,448 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2020-10-27 14:16:06,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:16:06,449 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 49 [2020-10-27 14:16:06,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:06,450 INFO L225 Difference]: With dead ends: 71 [2020-10-27 14:16:06,450 INFO L226 Difference]: Without dead ends: 58 [2020-10-27 14:16:06,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 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 14:16:06,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-27 14:16:06,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-27 14:16:06,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 14:16:06,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-27 14:16:06,457 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 49 [2020-10-27 14:16:06,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:06,458 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-27 14:16:06,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:16:06,458 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-27 14:16:06,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 14:16:06,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:06,458 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:16:06,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:16:06,459 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:06,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:06,459 INFO L82 PathProgramCache]: Analyzing trace with hash -230668352, now seen corresponding path program 17 times [2020-10-27 14:16:06,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:06,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819321856] [2020-10-27 14:16:06,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:06,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:06,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:06,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:07,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:10,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:10,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 14:16:10,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:16:10,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3909 [2020-10-27 14:16:10,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:10,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:16:10,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:16:10,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 14:16:10,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:10,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:10,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:10,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:10,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:10,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:10,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:10,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:16:10,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:10,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:10,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:10,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:10,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:10,705 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:16:10,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819321856] [2020-10-27 14:16:10,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:10,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:16:10,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782017116] [2020-10-27 14:16:10,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:16:10,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:10,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:16:10,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:16:10,707 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 21 states. [2020-10-27 14:16:10,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:10,863 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2020-10-27 14:16:10,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:16:10,864 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 51 [2020-10-27 14:16:10,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:10,865 INFO L225 Difference]: With dead ends: 73 [2020-10-27 14:16:10,865 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 14:16:10,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:16:10,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 14:16:10,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-27 14:16:10,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 14:16:10,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-10-27 14:16:10,871 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 51 [2020-10-27 14:16:10,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:10,871 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-10-27 14:16:10,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:16:10,871 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-10-27 14:16:10,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 14:16:10,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:10,872 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:16:10,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:16:10,872 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:10,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:10,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1625837474, now seen corresponding path program 18 times [2020-10-27 14:16:10,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:10,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965435962] [2020-10-27 14:16:10,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:10,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:10,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:10,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:11,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:15,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:15,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 14:16:15,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:16:15,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4784 [2020-10-27 14:16:15,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:15,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:16:15,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:16:15,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 14:16:15,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:16,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:16,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:16,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:16,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:16,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:16,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:16,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:16:16,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:16,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:16,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:16,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:16,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:16:16,126 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:16:16,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965435962] [2020-10-27 14:16:16,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:16,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:16:16,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459395208] [2020-10-27 14:16:16,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:16:16,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:16,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:16:16,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:16:16,130 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 22 states. [2020-10-27 14:16:16,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:16,268 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2020-10-27 14:16:16,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:16:16,269 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 53 [2020-10-27 14:16:16,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:16,270 INFO L225 Difference]: With dead ends: 75 [2020-10-27 14:16:16,270 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 14:16:16,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:16:16,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 14:16:16,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-27 14:16:16,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 14:16:16,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2020-10-27 14:16:16,276 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 53 [2020-10-27 14:16:16,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:16,276 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2020-10-27 14:16:16,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:16:16,277 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2020-10-27 14:16:16,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 14:16:16,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:16,277 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:16:16,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:16:16,278 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:16,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:16,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1941399932, now seen corresponding path program 19 times [2020-10-27 14:16:16,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:16,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451893171] [2020-10-27 14:16:16,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:16,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:16,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:16,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:17,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:21,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:21,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 14:16:21,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:16:21,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:16:21,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:21,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:16:21,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:16:21,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 14:16:21,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:21,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:21,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:21,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:21,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:21,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:21,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:21,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 14:16:21,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:21,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:21,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:21,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:21,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:21,702 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:16:21,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451893171] [2020-10-27 14:16:21,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:21,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:16:21,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778751011] [2020-10-27 14:16:21,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:16:21,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:21,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:16:21,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:16:21,705 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 23 states. [2020-10-27 14:16:21,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:21,848 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2020-10-27 14:16:21,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:16:21,848 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 55 [2020-10-27 14:16:21,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:21,849 INFO L225 Difference]: With dead ends: 77 [2020-10-27 14:16:21,849 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 14:16:21,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 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 14:16:21,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 14:16:21,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-27 14:16:21,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 14:16:21,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-10-27 14:16:21,854 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 55 [2020-10-27 14:16:21,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:21,855 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-10-27 14:16:21,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:16:21,855 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-10-27 14:16:21,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 14:16:21,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:21,855 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:16:21,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:16:21,856 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:21,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:21,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1622322406, now seen corresponding path program 20 times [2020-10-27 14:16:21,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:21,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702213147] [2020-10-27 14:16:21,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:21,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:21,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:21,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:22,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:26,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:26,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 14:16:26,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:16:26,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:16:26,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:26,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:16:26,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:16:26,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 14:16:26,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:27,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:27,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:27,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:27,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:27,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:27,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:27,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:16:27,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:27,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:27,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:27,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:27,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:16:27,266 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:16:27,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702213147] [2020-10-27 14:16:27,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:27,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 14:16:27,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109496212] [2020-10-27 14:16:27,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 14:16:27,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:27,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 14:16:27,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:16:27,271 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 24 states. [2020-10-27 14:16:27,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:27,497 INFO L93 Difference]: Finished difference Result 79 states and 82 transitions. [2020-10-27 14:16:27,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:16:27,500 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 57 [2020-10-27 14:16:27,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:27,501 INFO L225 Difference]: With dead ends: 79 [2020-10-27 14:16:27,502 INFO L226 Difference]: Without dead ends: 66 [2020-10-27 14:16:27,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:16:27,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-27 14:16:27,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-27 14:16:27,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-27 14:16:27,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-10-27 14:16:27,510 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 57 [2020-10-27 14:16:27,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:27,514 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-10-27 14:16:27,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 14:16:27,514 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-10-27 14:16:27,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 14:16:27,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:27,516 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:16:27,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:16:27,517 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:27,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:27,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1024412984, now seen corresponding path program 21 times [2020-10-27 14:16:27,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:27,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609901018] [2020-10-27 14:16:27,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:27,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:27,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:27,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:28,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:32,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:32,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 14:16:32,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:16:32,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:16:32,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:32,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 14:16:32,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:16:32,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 14:16:32,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:32,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:32,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:32,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:32,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:32,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:32,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:32,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:16:32,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:32,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:32,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:32,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:32,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:32,976 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:16:32,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609901018] [2020-10-27 14:16:32,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:32,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:16:32,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431443445] [2020-10-27 14:16:32,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:16:32,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:32,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:16:32,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:16:32,988 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 25 states. [2020-10-27 14:16:33,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:33,245 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2020-10-27 14:16:33,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:16:33,246 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 59 [2020-10-27 14:16:33,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:33,246 INFO L225 Difference]: With dead ends: 81 [2020-10-27 14:16:33,247 INFO L226 Difference]: Without dead ends: 68 [2020-10-27 14:16:33,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 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 14:16:33,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-27 14:16:33,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-27 14:16:33,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 14:16:33,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-10-27 14:16:33,252 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 59 [2020-10-27 14:16:33,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:33,253 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-10-27 14:16:33,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:16:33,253 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-10-27 14:16:33,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 14:16:33,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:33,254 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:16:33,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:16:33,254 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:33,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:33,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1916483542, now seen corresponding path program 22 times [2020-10-27 14:16:33,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:33,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31980512] [2020-10-27 14:16:33,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:33,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:33,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:33,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:34,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:38,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:38,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 14:16:38,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:16:38,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:16:38,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:38,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 14:16:38,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:16:38,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 14:16:38,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:38,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:38,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:38,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:38,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:38,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:38,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:38,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:16:38,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:38,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:38,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:38,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:38,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:38,761 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:16:38,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31980512] [2020-10-27 14:16:38,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:38,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 14:16:38,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697599276] [2020-10-27 14:16:38,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 14:16:38,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:38,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 14:16:38,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:16:38,764 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 26 states. [2020-10-27 14:16:39,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:39,030 INFO L93 Difference]: Finished difference Result 83 states and 86 transitions. [2020-10-27 14:16:39,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:16:39,030 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 61 [2020-10-27 14:16:39,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:39,031 INFO L225 Difference]: With dead ends: 83 [2020-10-27 14:16:39,031 INFO L226 Difference]: Without dead ends: 70 [2020-10-27 14:16:39,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 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 14:16:39,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-27 14:16:39,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-27 14:16:39,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 14:16:39,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-27 14:16:39,039 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 61 [2020-10-27 14:16:39,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:39,039 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-27 14:16:39,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 14:16:39,040 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-27 14:16:39,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 14:16:39,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:39,040 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:16:39,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:16:39,042 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:39,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:39,043 INFO L82 PathProgramCache]: Analyzing trace with hash 202830580, now seen corresponding path program 23 times [2020-10-27 14:16:39,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:39,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083292873] [2020-10-27 14:16:39,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:39,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:39,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:39,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:40,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:44,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:44,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 14:16:44,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:16:44,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:16:44,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:44,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:16:44,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:16:44,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 14:16:44,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:44,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:44,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:44,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:44,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:44,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:44,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:44,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:16:44,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:44,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:44,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:44,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:44,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:44,587 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:16:44,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083292873] [2020-10-27 14:16:44,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:44,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:16:44,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530206841] [2020-10-27 14:16:44,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:16:44,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:44,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:16:44,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:16:44,590 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 27 states. [2020-10-27 14:16:44,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:44,865 INFO L93 Difference]: Finished difference Result 85 states and 88 transitions. [2020-10-27 14:16:44,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:16:44,866 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 63 [2020-10-27 14:16:44,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:44,867 INFO L225 Difference]: With dead ends: 85 [2020-10-27 14:16:44,867 INFO L226 Difference]: Without dead ends: 72 [2020-10-27 14:16:44,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 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 14:16:44,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-27 14:16:44,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-27 14:16:44,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 14:16:44,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-27 14:16:44,875 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 63 [2020-10-27 14:16:44,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:44,875 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-27 14:16:44,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:16:44,875 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-27 14:16:44,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 14:16:44,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:44,876 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:16:44,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:16:44,876 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:44,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:44,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1645191534, now seen corresponding path program 24 times [2020-10-27 14:16:44,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:44,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281321241] [2020-10-27 14:16:44,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:44,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:44,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:46,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:49,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:49,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 14:16:49,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:16:49,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:16:49,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:49,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 14:16:49,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:16:49,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 14:16:49,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:50,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:50,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:50,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:50,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:50,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:50,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:50,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:16:50,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:50,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:50,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:50,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:50,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:50,479 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:16:50,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281321241] [2020-10-27 14:16:50,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:50,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 14:16:50,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032911615] [2020-10-27 14:16:50,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 14:16:50,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:50,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 14:16:50,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:16:50,481 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 28 states. [2020-10-27 14:16:50,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:50,792 INFO L93 Difference]: Finished difference Result 87 states and 90 transitions. [2020-10-27 14:16:50,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:16:50,793 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 65 [2020-10-27 14:16:50,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:50,794 INFO L225 Difference]: With dead ends: 87 [2020-10-27 14:16:50,794 INFO L226 Difference]: Without dead ends: 74 [2020-10-27 14:16:50,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:16:50,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-27 14:16:50,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-27 14:16:50,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 14:16:50,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-10-27 14:16:50,804 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 65 [2020-10-27 14:16:50,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:50,805 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-10-27 14:16:50,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 14:16:50,805 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-10-27 14:16:50,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 14:16:50,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:50,806 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:16:50,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:16:50,806 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:50,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:50,810 INFO L82 PathProgramCache]: Analyzing trace with hash 522017456, now seen corresponding path program 25 times [2020-10-27 14:16:50,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:50,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928348163] [2020-10-27 14:16:50,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:50,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:50,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:50,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:52,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:55,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:55,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 14:16:55,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:16:55,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:16:55,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:55,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 14:16:55,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:16:55,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 14:16:55,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:56,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:56,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:56,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:56,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:56,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:56,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:56,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:16:56,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:56,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:56,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:56,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:56,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:56,443 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:16:56,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928348163] [2020-10-27 14:16:56,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:56,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 14:16:56,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256258314] [2020-10-27 14:16:56,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 14:16:56,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:56,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 14:16:56,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:16:56,445 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 29 states. [2020-10-27 14:16:56,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:56,760 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2020-10-27 14:16:56,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:16:56,760 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 67 [2020-10-27 14:16:56,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:56,761 INFO L225 Difference]: With dead ends: 89 [2020-10-27 14:16:56,761 INFO L226 Difference]: Without dead ends: 76 [2020-10-27 14:16:56,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 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 14:16:56,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-27 14:16:56,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-27 14:16:56,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-27 14:16:56,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-10-27 14:16:56,767 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 67 [2020-10-27 14:16:56,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:56,767 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-10-27 14:16:56,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 14:16:56,767 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-10-27 14:16:56,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 14:16:56,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:56,768 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:16:56,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:16:56,768 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:56,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:56,769 INFO L82 PathProgramCache]: Analyzing trace with hash 150718286, now seen corresponding path program 26 times [2020-10-27 14:16:56,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:56,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295985441] [2020-10-27 14:16:56,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:56,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:56,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:56,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:58,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:01,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:01,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 14:17:01,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:17:01,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:17:01,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:01,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 14:17:01,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:17:01,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 14:17:01,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:02,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:17:02,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:02,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:02,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:02,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:17:02,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:02,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:17:02,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:02,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:02,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:02,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:02,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:02,412 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:17:02,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295985441] [2020-10-27 14:17:02,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:17:02,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 14:17:02,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074657577] [2020-10-27 14:17:02,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 14:17:02,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:17:02,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 14:17:02,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:17:02,415 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 30 states. [2020-10-27 14:17:02,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:17:02,750 INFO L93 Difference]: Finished difference Result 91 states and 94 transitions. [2020-10-27 14:17:02,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 14:17:02,751 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 69 [2020-10-27 14:17:02,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:17:02,752 INFO L225 Difference]: With dead ends: 91 [2020-10-27 14:17:02,752 INFO L226 Difference]: Without dead ends: 78 [2020-10-27 14:17:02,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:17:02,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-27 14:17:02,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-27 14:17:02,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 14:17:02,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2020-10-27 14:17:02,757 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 69 [2020-10-27 14:17:02,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:17:02,757 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2020-10-27 14:17:02,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 14:17:02,758 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2020-10-27 14:17:02,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 14:17:02,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:17:02,758 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:17:02,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:17:02,759 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:17:02,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:17:02,759 INFO L82 PathProgramCache]: Analyzing trace with hash -185498516, now seen corresponding path program 27 times [2020-10-27 14:17:02,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:17:02,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583941933] [2020-10-27 14:17:02,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:17:02,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:02,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:02,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:04,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:07,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:07,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 14:17:07,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:17:07,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5220 [2020-10-27 14:17:07,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:07,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 14:17:07,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:17:07,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 14:17:07,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:08,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:17:08,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:08,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:08,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:08,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:17:08,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:08,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:17:08,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:08,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:08,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:08,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:08,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:08,610 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:17:08,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583941933] [2020-10-27 14:17:08,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:17:08,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 14:17:08,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683724818] [2020-10-27 14:17:08,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 14:17:08,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:17:08,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 14:17:08,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:17:08,612 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 31 states. [2020-10-27 14:17:08,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:17:08,910 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2020-10-27 14:17:08,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 14:17:08,910 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 71 [2020-10-27 14:17:08,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:17:08,912 INFO L225 Difference]: With dead ends: 93 [2020-10-27 14:17:08,912 INFO L226 Difference]: Without dead ends: 80 [2020-10-27 14:17:08,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:17:08,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-27 14:17:08,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-27 14:17:08,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-27 14:17:08,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2020-10-27 14:17:08,918 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 71 [2020-10-27 14:17:08,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:17:08,918 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2020-10-27 14:17:08,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 14:17:08,918 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2020-10-27 14:17:08,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 14:17:08,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:17:08,919 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:17:08,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:17:08,919 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:17:08,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:17:08,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1167298038, now seen corresponding path program 28 times [2020-10-27 14:17:08,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:17:08,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118119008] [2020-10-27 14:17:08,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:17:08,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:08,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:08,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:11,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:15,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:15,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 14:17:15,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:17:15,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6964 [2020-10-27 14:17:15,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:15,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 14:17:15,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:17:15,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 14:17:15,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:16,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:17:16,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:16,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:16,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:16,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:17:16,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:16,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:17:16,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:16,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:16,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:16,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:16,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:16,609 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:17:16,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118119008] [2020-10-27 14:17:16,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:17:16,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 14:17:16,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870003158] [2020-10-27 14:17:16,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 14:17:16,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:17:16,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 14:17:16,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:17:16,611 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 32 states. [2020-10-27 14:17:16,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:17:16,955 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2020-10-27 14:17:16,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:17:16,956 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 73 [2020-10-27 14:17:16,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:17:16,956 INFO L225 Difference]: With dead ends: 95 [2020-10-27 14:17:16,957 INFO L226 Difference]: Without dead ends: 82 [2020-10-27 14:17:16,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:17:16,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-27 14:17:16,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-27 14:17:16,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-27 14:17:16,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-10-27 14:17:16,962 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 73 [2020-10-27 14:17:16,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:17:16,962 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-10-27 14:17:16,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 14:17:16,962 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-10-27 14:17:16,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 14:17:16,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:17:16,963 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:17:16,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 14:17:16,964 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:17:16,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:17:16,964 INFO L82 PathProgramCache]: Analyzing trace with hash 216166440, now seen corresponding path program 29 times [2020-10-27 14:17:16,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:17:16,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564047417] [2020-10-27 14:17:16,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:17:16,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:16,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:16,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:18,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:23,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:23,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 14:17:23,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:17:23,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6078 [2020-10-27 14:17:23,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:23,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 14:17:23,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:17:23,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 14:17:23,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:23,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:17:23,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:23,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:23,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:23,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:17:23,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:23,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:17:23,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:23,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:23,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:23,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:23,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:23,828 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:17:23,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564047417] [2020-10-27 14:17:23,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:17:23,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 14:17:23,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246400623] [2020-10-27 14:17:23,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 14:17:23,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:17:23,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 14:17:23,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:17:23,831 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 33 states. [2020-10-27 14:17:24,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:17:24,167 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2020-10-27 14:17:24,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 14:17:24,167 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 75 [2020-10-27 14:17:24,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:17:24,168 INFO L225 Difference]: With dead ends: 97 [2020-10-27 14:17:24,168 INFO L226 Difference]: Without dead ends: 84 [2020-10-27 14:17:24,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:17:24,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-27 14:17:24,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-27 14:17:24,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 14:17:24,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-27 14:17:24,174 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 75 [2020-10-27 14:17:24,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:17:24,174 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-27 14:17:24,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 14:17:24,175 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-27 14:17:24,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 14:17:24,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:17:24,176 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:17:24,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 14:17:24,176 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:17:24,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:17:24,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1714331962, now seen corresponding path program 30 times [2020-10-27 14:17:24,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:17:24,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472212136] [2020-10-27 14:17:24,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:17:24,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:24,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:24,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:25,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:30,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:30,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 14:17:30,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:17:30,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5822 [2020-10-27 14:17:30,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:30,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 14:17:30,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:17:30,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 14:17:30,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:30,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:17:30,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:30,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:30,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:30,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:17:30,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:30,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:17:30,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:30,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:30,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:30,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:30,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:30,813 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:17:30,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472212136] [2020-10-27 14:17:30,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:17:30,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 14:17:30,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153795316] [2020-10-27 14:17:30,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 14:17:30,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:17:30,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 14:17:30,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:17:30,817 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 34 states. [2020-10-27 14:17:31,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:17:31,119 INFO L93 Difference]: Finished difference Result 99 states and 102 transitions. [2020-10-27 14:17:31,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 14:17:31,120 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 77 [2020-10-27 14:17:31,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:17:31,121 INFO L225 Difference]: With dead ends: 99 [2020-10-27 14:17:31,121 INFO L226 Difference]: Without dead ends: 86 [2020-10-27 14:17:31,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:17:31,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-27 14:17:31,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-27 14:17:31,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-27 14:17:31,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2020-10-27 14:17:31,126 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 77 [2020-10-27 14:17:31,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:17:31,126 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2020-10-27 14:17:31,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 14:17:31,126 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2020-10-27 14:17:31,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 14:17:31,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:17:31,127 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:17:31,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 14:17:31,127 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:17:31,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:17:31,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1497424412, now seen corresponding path program 31 times [2020-10-27 14:17:31,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:17:31,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441526687] [2020-10-27 14:17:31,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:17:31,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:31,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:31,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:33,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:37,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:37,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 14:17:37,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:17:37,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6164 [2020-10-27 14:17:37,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:37,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 14:17:37,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:17:37,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 14:17:37,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:38,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:17:38,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:38,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:38,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:38,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:17:38,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:38,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:17:38,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:38,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:38,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:38,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:38,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:38,123 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:17:38,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441526687] [2020-10-27 14:17:38,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:17:38,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 14:17:38,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834110770] [2020-10-27 14:17:38,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 14:17:38,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:17:38,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 14:17:38,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:17:38,125 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 35 states. [2020-10-27 14:17:38,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:17:38,356 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2020-10-27 14:17:38,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 14:17:38,357 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 79 [2020-10-27 14:17:38,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:17:38,357 INFO L225 Difference]: With dead ends: 101 [2020-10-27 14:17:38,357 INFO L226 Difference]: Without dead ends: 88 [2020-10-27 14:17:38,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:17:38,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-27 14:17:38,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-27 14:17:38,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-27 14:17:38,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-10-27 14:17:38,363 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 79 [2020-10-27 14:17:38,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:17:38,363 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-10-27 14:17:38,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 14:17:38,364 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-10-27 14:17:38,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 14:17:38,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:17:38,365 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:17:38,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 14:17:38,365 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:17:38,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:17:38,365 INFO L82 PathProgramCache]: Analyzing trace with hash 792300930, now seen corresponding path program 32 times [2020-10-27 14:17:38,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:17:38,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960761374] [2020-10-27 14:17:38,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:17:38,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:38,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:38,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:40,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:44,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:44,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 14:17:44,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:17:44,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6359 [2020-10-27 14:17:44,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:44,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 14:17:44,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:17:44,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 14:17:44,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:45,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:17:45,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:45,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:45,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:45,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:17:45,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:45,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:17:45,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:45,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:45,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:45,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:45,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:45,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:17:45,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960761374] [2020-10-27 14:17:45,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:17:45,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 14:17:45,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810941912] [2020-10-27 14:17:45,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 14:17:45,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:17:45,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 14:17:45,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:17:45,636 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 36 states. [2020-10-27 14:17:45,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:17:45,877 INFO L93 Difference]: Finished difference Result 103 states and 106 transitions. [2020-10-27 14:17:45,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 14:17:45,877 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 81 [2020-10-27 14:17:45,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:17:45,879 INFO L225 Difference]: With dead ends: 103 [2020-10-27 14:17:45,879 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 14:17:45,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:17:45,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 14:17:45,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-27 14:17:45,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-27 14:17:45,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2020-10-27 14:17:45,886 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 81 [2020-10-27 14:17:45,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:17:45,886 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2020-10-27 14:17:45,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 14:17:45,886 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2020-10-27 14:17:45,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 14:17:45,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:17:45,887 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:17:45,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 14:17:45,887 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:17:45,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:17:45,888 INFO L82 PathProgramCache]: Analyzing trace with hash -2099868256, now seen corresponding path program 33 times [2020-10-27 14:17:45,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:17:45,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776453575] [2020-10-27 14:17:45,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:17:45,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:45,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:45,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:47,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:54,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:54,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 14:17:54,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:17:54,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8184 [2020-10-27 14:17:54,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:54,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 14:17:54,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:17:54,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 14:17:54,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:55,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:17:55,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:55,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:55,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:55,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:17:55,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:55,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:17:55,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:55,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:55,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:55,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:55,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:55,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:17:55,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776453575] [2020-10-27 14:17:55,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:17:55,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 14:17:55,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72960946] [2020-10-27 14:17:55,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 14:17:55,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:17:55,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 14:17:55,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:17:55,039 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand 37 states. [2020-10-27 14:17:55,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:17:55,316 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2020-10-27 14:17:55,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 14:17:55,317 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 83 [2020-10-27 14:17:55,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:17:55,318 INFO L225 Difference]: With dead ends: 105 [2020-10-27 14:17:55,318 INFO L226 Difference]: Without dead ends: 92 [2020-10-27 14:17:55,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:17:55,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-27 14:17:55,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-27 14:17:55,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 14:17:55,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2020-10-27 14:17:55,324 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 83 [2020-10-27 14:17:55,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:17:55,325 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2020-10-27 14:17:55,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 14:17:55,325 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2020-10-27 14:17:55,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 14:17:55,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:17:55,326 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:17:55,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 14:17:55,326 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:17:55,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:17:55,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1664351806, now seen corresponding path program 34 times [2020-10-27 14:17:55,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:17:55,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [924550419] [2020-10-27 14:17:55,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:17:55,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:55,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:55,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:59,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:07,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:07,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 14:18:07,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:18:07,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11965 [2020-10-27 14:18:07,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:07,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 14:18:07,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:18:07,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 14:18:07,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:08,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:18:08,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:08,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:08,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:08,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:18:08,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:08,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:18:08,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:08,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:08,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:08,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:08,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:08,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:18:08,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [924550419] [2020-10-27 14:18:08,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:18:08,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 14:18:08,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898517658] [2020-10-27 14:18:08,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 14:18:08,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:18:08,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 14:18:08,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:18:08,286 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 38 states. [2020-10-27 14:18:08,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:18:08,668 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2020-10-27 14:18:08,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 14:18:08,668 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 85 [2020-10-27 14:18:08,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:18:08,669 INFO L225 Difference]: With dead ends: 107 [2020-10-27 14:18:08,669 INFO L226 Difference]: Without dead ends: 94 [2020-10-27 14:18:08,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:18:08,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-27 14:18:08,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-27 14:18:08,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-27 14:18:08,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2020-10-27 14:18:08,676 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 85 [2020-10-27 14:18:08,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:18:08,676 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2020-10-27 14:18:08,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 14:18:08,676 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2020-10-27 14:18:08,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 14:18:08,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:08,678 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:18:08,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 14:18:08,678 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:08,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:08,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1577599140, now seen corresponding path program 35 times [2020-10-27 14:18:08,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:08,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847223505] [2020-10-27 14:18:08,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:08,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:08,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:08,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:10,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:21,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:21,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 14:18:21,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:18:21,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13054 [2020-10-27 14:18:21,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:21,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 14:18:21,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:18:21,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 14:18:21,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:22,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:18:22,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:22,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:22,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:22,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:18:22,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:22,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:18:22,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:22,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:22,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:22,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:22,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:22,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:18:22,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847223505] [2020-10-27 14:18:22,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:18:22,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 14:18:22,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715030350] [2020-10-27 14:18:22,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 14:18:22,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:18:22,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 14:18:22,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:18:22,797 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand 39 states. [2020-10-27 14:18:23,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:18:23,234 INFO L93 Difference]: Finished difference Result 109 states and 112 transitions. [2020-10-27 14:18:23,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 14:18:23,235 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 87 [2020-10-27 14:18:23,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:18:23,237 INFO L225 Difference]: With dead ends: 109 [2020-10-27 14:18:23,237 INFO L226 Difference]: Without dead ends: 96 [2020-10-27 14:18:23,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:18:23,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-27 14:18:23,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-27 14:18:23,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 14:18:23,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2020-10-27 14:18:23,252 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 87 [2020-10-27 14:18:23,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:18:23,252 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2020-10-27 14:18:23,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 14:18:23,252 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2020-10-27 14:18:23,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-27 14:18:23,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:23,253 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:18:23,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 14:18:23,254 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:23,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:23,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1053798650, now seen corresponding path program 36 times [2020-10-27 14:18:23,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:23,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655575452] [2020-10-27 14:18:23,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:23,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:23,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:23,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:26,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:34,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:34,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 14:18:34,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:18:34,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11391 [2020-10-27 14:18:34,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:34,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 14:18:34,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:18:34,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 14:18:34,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:35,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:18:35,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:35,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:35,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:35,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:18:35,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:35,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:18:35,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:35,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:35,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:35,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:35,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:35,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:18:35,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655575452] [2020-10-27 14:18:35,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:18:35,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 14:18:35,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575688608] [2020-10-27 14:18:35,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 14:18:35,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:18:35,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 14:18:35,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 14:18:35,742 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 40 states. [2020-10-27 14:18:35,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:18:35,991 INFO L93 Difference]: Finished difference Result 111 states and 114 transitions. [2020-10-27 14:18:35,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 14:18:35,992 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 89 [2020-10-27 14:18:35,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:18:35,993 INFO L225 Difference]: With dead ends: 111 [2020-10-27 14:18:35,993 INFO L226 Difference]: Without dead ends: 98 [2020-10-27 14:18:35,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 14:18:35,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-27 14:18:35,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-27 14:18:35,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 14:18:36,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2020-10-27 14:18:36,000 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 89 [2020-10-27 14:18:36,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:18:36,000 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2020-10-27 14:18:36,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 14:18:36,000 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2020-10-27 14:18:36,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-27 14:18:36,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:36,001 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:18:36,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 14:18:36,002 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:36,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:36,002 INFO L82 PathProgramCache]: Analyzing trace with hash 91337496, now seen corresponding path program 37 times [2020-10-27 14:18:36,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:36,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506321338] [2020-10-27 14:18:36,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:36,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:36,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:36,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:39,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking...