/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/eca-rers2012/Problem18_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:08:58,945 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:08:58,950 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:08:59,017 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:08:59,018 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:08:59,025 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:08:59,027 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:08:59,032 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:08:59,036 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:08:59,042 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:08:59,044 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:08:59,046 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:08:59,046 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:08:59,050 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:08:59,052 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:08:59,054 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:08:59,056 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:08:59,059 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:08:59,067 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:08:59,077 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:08:59,080 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:08:59,082 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:08:59,084 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:08:59,087 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:08:59,096 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:08:59,096 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:08:59,096 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:08:59,099 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:08:59,100 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:08:59,101 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:08:59,101 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:08:59,102 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:08:59,104 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:08:59,105 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:08:59,107 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:08:59,107 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:08:59,108 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:08:59,108 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:08:59,108 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:08:59,136 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:08:59,137 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:08:59,147 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 19:08:59,216 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:08:59,217 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:08:59,222 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:08:59,222 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:08:59,222 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:08:59,223 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:08:59,223 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:08:59,223 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:08:59,223 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:08:59,223 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:08:59,225 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:08:59,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:08:59,225 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:08:59,225 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:08:59,226 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:08:59,226 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:08:59,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:08:59,226 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:08:59,226 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:08:59,226 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:08:59,227 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:08:59,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:08:59,227 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:08:59,227 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:08:59,227 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:08:59,228 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:08:59,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:08:59,228 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:08:59,228 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:08:59,228 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:08:59,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:08:59,714 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:08:59,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:08:59,719 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:08:59,720 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:08:59,721 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label24.c [2020-10-27 19:08:59,803 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7a2961e2d/59c78e76e839484f9174c178cdc3df9c/FLAG4c6b4714e [2020-10-27 19:09:00,776 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:09:00,777 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem18_label24.c [2020-10-27 19:09:00,816 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7a2961e2d/59c78e76e839484f9174c178cdc3df9c/FLAG4c6b4714e [2020-10-27 19:09:01,298 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7a2961e2d/59c78e76e839484f9174c178cdc3df9c [2020-10-27 19:09:01,304 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:09:01,312 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:09:01,317 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:09:01,317 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:09:01,321 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:09:01,323 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:09:01" (1/1) ... [2020-10-27 19:09:01,327 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4924ce5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:09:01, skipping insertion in model container [2020-10-27 19:09:01,328 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:09:01" (1/1) ... [2020-10-27 19:09:01,337 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:09:01,497 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:09:02,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:09:02,657 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:09:03,200 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:09:03,238 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:09:03,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:09:03 WrapperNode [2020-10-27 19:09:03,240 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:09:03,242 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:09:03,242 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:09:03,242 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:09:03,259 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:09:03" (1/1) ... [2020-10-27 19:09:03,262 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:09:03" (1/1) ... [2020-10-27 19:09:03,341 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:09:03" (1/1) ... [2020-10-27 19:09:03,342 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:09:03" (1/1) ... [2020-10-27 19:09:03,492 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:09:03" (1/1) ... [2020-10-27 19:09:03,539 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:09:03" (1/1) ... [2020-10-27 19:09:03,578 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:09:03" (1/1) ... [2020-10-27 19:09:03,613 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:09:03,616 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:09:03,616 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:09:03,616 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:09:03,618 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:09:03" (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 19:09:03,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:09:03,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:09:03,709 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:09:03,709 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 19:09:03,710 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 19:09:03,710 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 19:09:03,710 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:09:03,710 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 19:09:03,710 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 19:09:03,710 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 19:09:03,712 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:09:03,712 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:09:03,712 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:09:03,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:09:03,712 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 19:09:03,713 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 19:09:03,713 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:09:03,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:09:03,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:09:03,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:09:03,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:09:03,714 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:09:03,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:09:08,130 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:09:08,131 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 19:09:08,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:09:08 BoogieIcfgContainer [2020-10-27 19:09:08,136 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:09:08,139 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:09:08,139 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:09:08,143 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:09:08,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:09:01" (1/3) ... [2020-10-27 19:09:08,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c9e1369 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:09:08, skipping insertion in model container [2020-10-27 19:09:08,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:09:03" (2/3) ... [2020-10-27 19:09:08,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c9e1369 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:09:08, skipping insertion in model container [2020-10-27 19:09:08,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:09:08" (3/3) ... [2020-10-27 19:09:08,147 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem18_label24.c [2020-10-27 19:09:08,161 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:09:08,167 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:09:08,183 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:09:08,217 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:09:08,217 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:09:08,218 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:09:08,218 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:09:08,218 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:09:08,218 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:09:08,218 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:09:08,218 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:09:08,254 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states. [2020-10-27 19:09:08,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 19:09:08,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:09:08,264 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:09:08,265 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:09:08,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:09:08,272 INFO L82 PathProgramCache]: Analyzing trace with hash 463481712, now seen corresponding path program 1 times [2020-10-27 19:09:08,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:09:08,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490418347] [2020-10-27 19:09:08,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:09:08,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:09:08,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:09:09,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:09:09,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 19:09:09,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:09:09,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 640 [2020-10-27 19:09:09,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:09:09,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:09:09,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:09:09,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 19:09:09,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 19:09:09,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:09:09,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:09:09,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:09:09,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:09:09,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:09:09,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:09:09,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 19:09:09,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:09:09,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:09:09,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:09:09,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:09:09,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:09:09,466 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 19:09:09,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490418347] [2020-10-27 19:09:09,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:09:09,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 19:09:09,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661259678] [2020-10-27 19:09:09,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:09:09,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:09:09,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:09:09,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:09:09,496 INFO L87 Difference]: Start difference. First operand 778 states. Second operand 4 states. [2020-10-27 19:09:18,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:09:18,787 INFO L93 Difference]: Finished difference Result 2275 states and 4354 transitions. [2020-10-27 19:09:18,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:09:18,790 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-10-27 19:09:18,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:09:18,828 INFO L225 Difference]: With dead ends: 2275 [2020-10-27 19:09:18,829 INFO L226 Difference]: Without dead ends: 1433 [2020-10-27 19:09:18,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:09:18,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1433 states. [2020-10-27 19:09:19,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1433 to 1429. [2020-10-27 19:09:19,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1429 states. [2020-10-27 19:09:19,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 2323 transitions. [2020-10-27 19:09:19,041 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 2323 transitions. Word has length 58 [2020-10-27 19:09:19,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:09:19,042 INFO L481 AbstractCegarLoop]: Abstraction has 1429 states and 2323 transitions. [2020-10-27 19:09:19,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:09:19,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 2323 transitions. [2020-10-27 19:09:19,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-27 19:09:19,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:09:19,059 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:09:19,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:09:19,060 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:09:19,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:09:19,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1587550226, now seen corresponding path program 1 times [2020-10-27 19:09:19,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:09:19,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521847275] [2020-10-27 19:09:19,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:09:19,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:09:19,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:09:19,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:09:20,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:09:20,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-27 19:09:20,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:09:20,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1274 [2020-10-27 19:09:20,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:09:20,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:09:20,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-27 19:09:20,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 19:09:20,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:09:20,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:09:20,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:09:20,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:09:20,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:09:20,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:09:20,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:09:20,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 19:09:20,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:09:20,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:09:20,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:09:20,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:09:20,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:09:20,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:09:20,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:09:20,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:09:20,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:09:20,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 19:09:20,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:09:20,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-27 19:09:20,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:09:20,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:09:20,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:09:20,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 19:09:20,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:09:20,883 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 49 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:09:20,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521847275] [2020-10-27 19:09:20,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:09:20,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 19:09:20,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848279752] [2020-10-27 19:09:20,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:09:20,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:09:20,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:09:20,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:09:20,892 INFO L87 Difference]: Start difference. First operand 1429 states and 2323 transitions. Second operand 6 states. [2020-10-27 19:09:37,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:09:37,973 INFO L93 Difference]: Finished difference Result 5697 states and 9375 transitions. [2020-10-27 19:09:37,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:09:37,975 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 127 [2020-10-27 19:09:37,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:09:38,004 INFO L225 Difference]: With dead ends: 5697 [2020-10-27 19:09:38,005 INFO L226 Difference]: Without dead ends: 4274 [2020-10-27 19:09:38,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:09:38,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4274 states. [2020-10-27 19:09:38,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4274 to 4270. [2020-10-27 19:09:38,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4270 states. [2020-10-27 19:09:38,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4270 states to 4270 states and 6378 transitions. [2020-10-27 19:09:38,169 INFO L78 Accepts]: Start accepts. Automaton has 4270 states and 6378 transitions. Word has length 127 [2020-10-27 19:09:38,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:09:38,172 INFO L481 AbstractCegarLoop]: Abstraction has 4270 states and 6378 transitions. [2020-10-27 19:09:38,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:09:38,173 INFO L276 IsEmpty]: Start isEmpty. Operand 4270 states and 6378 transitions. [2020-10-27 19:09:38,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-27 19:09:38,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:09:38,176 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:09:38,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:09:38,177 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:09:38,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:09:38,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1450107316, now seen corresponding path program 1 times [2020-10-27 19:09:38,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:09:38,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809629896] [2020-10-27 19:09:38,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:09:38,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:09:38,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:09:38,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:09:39,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:09:39,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-27 19:09:39,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:09:39,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 877 [2020-10-27 19:09:39,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:09:39,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:09:39,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-27 19:09:39,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 19:09:39,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:09:39,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:09:39,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:09:39,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:09:39,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:09:39,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:09:39,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:09:39,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 19:09:39,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:09:39,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:09:39,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:09:39,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:09:39,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:09:39,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:09:39,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:09:39,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:09:39,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:09:39,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 19:09:39,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:09:39,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-27 19:09:39,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:09:39,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:09:39,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:09:39,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 19:09:39,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:09:39,489 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 49 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:09:39,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809629896] [2020-10-27 19:09:39,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:09:39,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:09:39,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539139510] [2020-10-27 19:09:39,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:09:39,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:09:39,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:09:39,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:09:39,495 INFO L87 Difference]: Start difference. First operand 4270 states and 6378 transitions. Second operand 5 states. [2020-10-27 19:09:53,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:09:53,996 INFO L93 Difference]: Finished difference Result 11375 states and 17422 transitions. [2020-10-27 19:09:53,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:09:53,998 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 130 [2020-10-27 19:09:53,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:09:54,043 INFO L225 Difference]: With dead ends: 11375 [2020-10-27 19:09:54,043 INFO L226 Difference]: Without dead ends: 7111 [2020-10-27 19:09:54,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:09:54,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7111 states. [2020-10-27 19:09:54,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7111 to 7107. [2020-10-27 19:09:54,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7107 states. [2020-10-27 19:09:54,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7107 states to 7107 states and 9846 transitions. [2020-10-27 19:09:54,311 INFO L78 Accepts]: Start accepts. Automaton has 7107 states and 9846 transitions. Word has length 130 [2020-10-27 19:09:54,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:09:54,314 INFO L481 AbstractCegarLoop]: Abstraction has 7107 states and 9846 transitions. [2020-10-27 19:09:54,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:09:54,314 INFO L276 IsEmpty]: Start isEmpty. Operand 7107 states and 9846 transitions. [2020-10-27 19:09:54,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-27 19:09:54,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:09:54,318 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:09:54,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:09:54,318 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:09:54,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:09:54,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1574893754, now seen corresponding path program 1 times [2020-10-27 19:09:54,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:09:54,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874029869] [2020-10-27 19:09:54,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:09:54,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:09:54,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:09:54,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:09:55,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:09:55,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-27 19:09:55,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:09:55,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1045 [2020-10-27 19:09:55,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:09:55,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:09:55,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 99 [2020-10-27 19:09:55,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 19:09:55,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-27 19:09:55,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:09:55,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:09:55,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:09:55,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:09:55,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:09:55,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:09:55,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:09:55,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:09:55,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:09:55,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:09:55,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:09:55,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:09:55,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:09:55,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:09:55,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:09:55,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:09:55,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 19:09:55,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:09:55,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-27 19:09:55,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:09:55,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:09:55,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:09:55,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-27 19:09:55,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:09:55,768 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 49 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:09:55,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874029869] [2020-10-27 19:09:55,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:09:55,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:09:55,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037090814] [2020-10-27 19:09:55,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:09:55,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:09:55,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:09:55,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:09:55,771 INFO L87 Difference]: Start difference. First operand 7107 states and 9846 transitions. Second operand 5 states. [2020-10-27 19:10:10,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:10:10,244 INFO L93 Difference]: Finished difference Result 19170 states and 27405 transitions. [2020-10-27 19:10:10,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:10:10,245 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2020-10-27 19:10:10,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:10:10,324 INFO L225 Difference]: With dead ends: 19170 [2020-10-27 19:10:10,324 INFO L226 Difference]: Without dead ends: 12069 [2020-10-27 19:10:10,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:10:10,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12069 states. [2020-10-27 19:10:10,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12069 to 12065. [2020-10-27 19:10:10,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12065 states. [2020-10-27 19:10:10,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12065 states to 12065 states and 16212 transitions. [2020-10-27 19:10:10,705 INFO L78 Accepts]: Start accepts. Automaton has 12065 states and 16212 transitions. Word has length 147 [2020-10-27 19:10:10,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:10:10,706 INFO L481 AbstractCegarLoop]: Abstraction has 12065 states and 16212 transitions. [2020-10-27 19:10:10,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:10:10,706 INFO L276 IsEmpty]: Start isEmpty. Operand 12065 states and 16212 transitions. [2020-10-27 19:10:10,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-10-27 19:10:10,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:10:10,717 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:10:10,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 19:10:10,717 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:10:10,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:10:10,718 INFO L82 PathProgramCache]: Analyzing trace with hash 777700696, now seen corresponding path program 1 times [2020-10-27 19:10:10,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:10:10,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748199591] [2020-10-27 19:10:10,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:10:10,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:10:10,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:10:10,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:10:11,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:10:12,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:10:12,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 220 [2020-10-27 19:10:12,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:10:12,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1701 [2020-10-27 19:10:12,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:10:12,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:10:12,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 160 [2020-10-27 19:10:12,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 19:10:12,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:10:12,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:10:12,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:10:12,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:10:12,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:10:12,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:10:12,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:10:12,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:10:12,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:10:12,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:10:12,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:10:12,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:10:12,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:10:12,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:10:12,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:10:12,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:10:12,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:10:12,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-27 19:10:12,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:10:12,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-27 19:10:12,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:10:12,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:10:12,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:10:12,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 145 [2020-10-27 19:10:12,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:10:13,072 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 49 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:10:13,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748199591] [2020-10-27 19:10:13,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:10:13,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:10:13,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934456474] [2020-10-27 19:10:13,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:10:13,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:10:13,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:10:13,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:10:13,076 INFO L87 Difference]: Start difference. First operand 12065 states and 16212 transitions. Second operand 5 states. [2020-10-27 19:10:23,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:10:23,282 INFO L93 Difference]: Finished difference Result 24150 states and 32479 transitions. [2020-10-27 19:10:23,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:10:23,285 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 208 [2020-10-27 19:10:23,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:10:23,332 INFO L225 Difference]: With dead ends: 24150 [2020-10-27 19:10:23,332 INFO L226 Difference]: Without dead ends: 12069 [2020-10-27 19:10:23,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:10:23,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12069 states. [2020-10-27 19:10:23,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12069 to 12065. [2020-10-27 19:10:23,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12065 states. [2020-10-27 19:10:23,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12065 states to 12065 states and 16206 transitions. [2020-10-27 19:10:23,666 INFO L78 Accepts]: Start accepts. Automaton has 12065 states and 16206 transitions. Word has length 208 [2020-10-27 19:10:23,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:10:23,666 INFO L481 AbstractCegarLoop]: Abstraction has 12065 states and 16206 transitions. [2020-10-27 19:10:23,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:10:23,669 INFO L276 IsEmpty]: Start isEmpty. Operand 12065 states and 16206 transitions. [2020-10-27 19:10:23,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-10-27 19:10:23,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:10:23,676 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:10:23,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 19:10:23,677 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:10:23,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:10:23,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1158107200, now seen corresponding path program 1 times [2020-10-27 19:10:23,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:10:23,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1732797525] [2020-10-27 19:10:23,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:10:23,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:10:23,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:10:24,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:10:24,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:10:25,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:10:25,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 232 [2020-10-27 19:10:25,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:10:25,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1732 [2020-10-27 19:10:25,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:10:25,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:10:25,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 172 [2020-10-27 19:10:25,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 19:10:25,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:10:25,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:10:25,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:10:25,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:10:25,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:10:25,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:10:25,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:10:25,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:10:25,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:10:25,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:10:25,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:10:25,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:10:25,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:10:25,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:10:25,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:10:25,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:10:25,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:10:25,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-27 19:10:25,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:10:25,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-27 19:10:25,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:10:25,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:10:25,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:10:25,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 157 [2020-10-27 19:10:25,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:10:26,003 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 49 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:10:26,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1732797525] [2020-10-27 19:10:26,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:10:26,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:10:26,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625378920] [2020-10-27 19:10:26,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:10:26,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:10:26,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:10:26,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:10:26,008 INFO L87 Difference]: Start difference. First operand 12065 states and 16206 transitions. Second operand 5 states. [2020-10-27 19:10:40,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:10:40,745 INFO L93 Difference]: Finished difference Result 29104 states and 40208 transitions. [2020-10-27 19:10:40,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:10:40,746 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 220 [2020-10-27 19:10:40,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:10:40,811 INFO L225 Difference]: With dead ends: 29104 [2020-10-27 19:10:40,811 INFO L226 Difference]: Without dead ends: 17045 [2020-10-27 19:10:40,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:10:40,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17045 states. [2020-10-27 19:10:41,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17045 to 17039. [2020-10-27 19:10:41,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17039 states. [2020-10-27 19:10:41,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17039 states to 17039 states and 22521 transitions. [2020-10-27 19:10:41,385 INFO L78 Accepts]: Start accepts. Automaton has 17039 states and 22521 transitions. Word has length 220 [2020-10-27 19:10:41,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:10:41,386 INFO L481 AbstractCegarLoop]: Abstraction has 17039 states and 22521 transitions. [2020-10-27 19:10:41,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:10:41,386 INFO L276 IsEmpty]: Start isEmpty. Operand 17039 states and 22521 transitions. [2020-10-27 19:10:41,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-10-27 19:10:41,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:10:41,394 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:10:41,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 19:10:41,395 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:10:41,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:10:41,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1555974992, now seen corresponding path program 1 times [2020-10-27 19:10:41,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:10:41,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383781076] [2020-10-27 19:10:41,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:10:41,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:10:41,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:10:41,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:10:41,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:10:42,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:10:46,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:10:46,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 236 [2020-10-27 19:10:46,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:10:46,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 19:10:46,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:10:46,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:10:46,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 176 [2020-10-27 19:10:46,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 19:10:46,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:10:46,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:10:46,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:10:46,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:10:46,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:10:46,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:10:46,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:10:46,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 19:10:46,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:10:46,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:10:46,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:10:46,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:10:46,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:10:46,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:10:46,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:10:46,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:10:46,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:10:46,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 19:10:46,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:10:46,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 19:10:46,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:10:46,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:10:46,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:10:46,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:10:46,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:10:46,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-27 19:10:46,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:10:46,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:10:46,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:10:46,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 19:10:46,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:10:46,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-27 19:10:46,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:10:46,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:10:46,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:10:46,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-27 19:10:46,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:10:47,234 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-10-27 19:10:47,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383781076] [2020-10-27 19:10:47,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:10:47,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:10:47,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464286740] [2020-10-27 19:10:47,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:10:47,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:10:47,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:10:47,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:10:47,237 INFO L87 Difference]: Start difference. First operand 17039 states and 22521 transitions. Second operand 5 states. [2020-10-27 19:10:48,444 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-10-27 19:10:57,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:10:57,106 INFO L93 Difference]: Finished difference Result 34110 states and 45122 transitions. [2020-10-27 19:10:57,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:10:57,107 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 222 [2020-10-27 19:10:57,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:10:57,177 INFO L225 Difference]: With dead ends: 34110 [2020-10-27 19:10:57,178 INFO L226 Difference]: Without dead ends: 17045 [2020-10-27 19:10:57,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:10:57,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17045 states. [2020-10-27 19:10:57,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17045 to 17039. [2020-10-27 19:10:57,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17039 states. [2020-10-27 19:10:57,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17039 states to 17039 states and 22513 transitions. [2020-10-27 19:10:57,605 INFO L78 Accepts]: Start accepts. Automaton has 17039 states and 22513 transitions. Word has length 222 [2020-10-27 19:10:57,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:10:57,605 INFO L481 AbstractCegarLoop]: Abstraction has 17039 states and 22513 transitions. [2020-10-27 19:10:57,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:10:57,606 INFO L276 IsEmpty]: Start isEmpty. Operand 17039 states and 22513 transitions. [2020-10-27 19:10:57,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-10-27 19:10:57,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:10:57,613 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:10:57,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 19:10:57,614 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:10:57,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:10:57,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1301800408, now seen corresponding path program 1 times [2020-10-27 19:10:57,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:10:57,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210095696] [2020-10-27 19:10:57,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:10:57,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:10:57,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:10:58,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:10:58,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:10:59,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:10:59,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 244 [2020-10-27 19:10:59,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:10:59,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1682 [2020-10-27 19:10:59,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:10:59,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:10:59,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 184 [2020-10-27 19:10:59,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 19:10:59,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:10:59,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:10:59,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:10:59,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:10:59,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:10:59,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:10:59,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:10:59,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:10:59,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:10:59,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:10:59,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:10:59,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:10:59,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:10:59,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:10:59,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:10:59,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:10:59,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:10:59,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-27 19:10:59,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:10:59,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-27 19:10:59,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:10:59,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:10:59,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:10:59,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 169 [2020-10-27 19:10:59,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:10:59,961 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 49 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:10:59,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210095696] [2020-10-27 19:10:59,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:10:59,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 19:10:59,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023461733] [2020-10-27 19:10:59,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:10:59,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:10:59,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:10:59,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:10:59,964 INFO L87 Difference]: Start difference. First operand 17039 states and 22513 transitions. Second operand 6 states. [2020-10-27 19:11:23,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:11:23,672 INFO L93 Difference]: Finished difference Result 41867 states and 56898 transitions. [2020-10-27 19:11:23,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:11:23,674 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 232 [2020-10-27 19:11:23,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:11:23,756 INFO L225 Difference]: With dead ends: 41867 [2020-10-27 19:11:23,756 INFO L226 Difference]: Without dead ends: 24834 [2020-10-27 19:11:23,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:11:23,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24834 states. [2020-10-27 19:11:24,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24834 to 24828. [2020-10-27 19:11:24,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24828 states. [2020-10-27 19:11:24,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24828 states to 24828 states and 31640 transitions. [2020-10-27 19:11:24,310 INFO L78 Accepts]: Start accepts. Automaton has 24828 states and 31640 transitions. Word has length 232 [2020-10-27 19:11:24,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:11:24,310 INFO L481 AbstractCegarLoop]: Abstraction has 24828 states and 31640 transitions. [2020-10-27 19:11:24,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:11:24,311 INFO L276 IsEmpty]: Start isEmpty. Operand 24828 states and 31640 transitions. [2020-10-27 19:11:24,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-10-27 19:11:24,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:11:24,327 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:11:24,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 19:11:24,327 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:11:24,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:11:24,328 INFO L82 PathProgramCache]: Analyzing trace with hash 913497608, now seen corresponding path program 1 times [2020-10-27 19:11:24,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:11:24,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027864689] [2020-10-27 19:11:24,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:11:24,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:11:24,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:11:24,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:11:24,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:11:25,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:11:29,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:11:29,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 336 [2020-10-27 19:11:29,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:11:29,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 19:11:29,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:11:29,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:11:29,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 276 [2020-10-27 19:11:29,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 19:11:29,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:11:29,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:11:29,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:11:29,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:11:29,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:11:29,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:11:29,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:11:29,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:11:29,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:11:29,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:11:29,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:11:29,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:11:29,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:11:29,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:11:29,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:11:29,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:11:29,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:11:29,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 19:11:29,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:11:29,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 19:11:29,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:11:29,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:11:29,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:11:29,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:11:29,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 19:11:29,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-27 19:11:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:11:29,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:11:29,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:11:29,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-27 19:11:29,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:11:29,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-27 19:11:29,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:11:29,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:11:29,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:11:29,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 189 [2020-10-27 19:11:29,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:11:29,982 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-10-27 19:11:29,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027864689] [2020-10-27 19:11:29,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:11:29,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:11:29,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123689603] [2020-10-27 19:11:29,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:11:29,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:11:29,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:11:29,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:11:29,994 INFO L87 Difference]: Start difference. First operand 24828 states and 31640 transitions. Second operand 5 states. [2020-10-27 19:11:32,292 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-27 19:11:40,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:11:40,726 INFO L93 Difference]: Finished difference Result 49665 states and 63355 transitions. [2020-10-27 19:11:40,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:11:40,727 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 322 [2020-10-27 19:11:40,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:11:40,811 INFO L225 Difference]: With dead ends: 49665 [2020-10-27 19:11:40,811 INFO L226 Difference]: Without dead ends: 24834 [2020-10-27 19:11:40,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:11:40,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24834 states. [2020-10-27 19:11:41,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24834 to 24828. [2020-10-27 19:11:41,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24828 states. [2020-10-27 19:11:41,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24828 states to 24828 states and 31626 transitions. [2020-10-27 19:11:41,442 INFO L78 Accepts]: Start accepts. Automaton has 24828 states and 31626 transitions. Word has length 322 [2020-10-27 19:11:41,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:11:41,443 INFO L481 AbstractCegarLoop]: Abstraction has 24828 states and 31626 transitions. [2020-10-27 19:11:41,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:11:41,443 INFO L276 IsEmpty]: Start isEmpty. Operand 24828 states and 31626 transitions. [2020-10-27 19:11:41,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-10-27 19:11:41,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:11:41,464 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:11:41,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 19:11:41,464 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:11:41,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:11:41,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1775537478, now seen corresponding path program 1 times [2020-10-27 19:11:41,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:11:41,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284564291] [2020-10-27 19:11:41,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:11:41,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:11:41,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:11:41,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:11:41,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:11:46,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:11:46,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 355 [2020-10-27 19:11:46,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:11:46,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4522 [2020-10-27 19:11:46,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:11:46,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:11:46,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-27 19:11:46,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 216 [2020-10-27 19:11:46,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:11:46,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:11:46,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:11:46,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:11:46,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:11:46,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:11:46,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:11:46,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:11:46,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:11:46,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:11:46,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:11:46,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:11:46,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:11:46,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:11:46,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:11:46,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:11:46,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:11:46,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 19:11:46,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:11:46,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 19:11:46,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:11:46,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:11:46,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:11:46,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 19:11:46,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:11:46,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-27 19:11:46,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:11:46,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:11:46,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:11:46,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 214 [2020-10-27 19:11:46,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:11:46,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-27 19:11:46,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:11:46,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:11:46,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 19:11:46,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 214 [2020-10-27 19:11:46,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:11:46,675 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 167 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 19:11:46,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284564291] [2020-10-27 19:11:46,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:11:46,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 19:11:46,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364334033] [2020-10-27 19:11:46,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 19:11:46,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:11:46,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 19:11:46,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:11:46,677 INFO L87 Difference]: Start difference. First operand 24828 states and 31626 transitions. Second operand 7 states. [2020-10-27 19:12:02,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:12:02,454 INFO L93 Difference]: Finished difference Result 58630 states and 79896 transitions. [2020-10-27 19:12:02,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 19:12:02,457 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 341 [2020-10-27 19:12:02,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:12:02,586 INFO L225 Difference]: With dead ends: 58630 [2020-10-27 19:12:02,586 INFO L226 Difference]: Without dead ends: 33808 [2020-10-27 19:12:02,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:12:02,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33808 states. [2020-10-27 19:12:03,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33808 to 33550. [2020-10-27 19:12:03,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33550 states. [2020-10-27 19:12:03,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33550 states to 33550 states and 43223 transitions. [2020-10-27 19:12:03,292 INFO L78 Accepts]: Start accepts. Automaton has 33550 states and 43223 transitions. Word has length 341 [2020-10-27 19:12:03,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:12:03,293 INFO L481 AbstractCegarLoop]: Abstraction has 33550 states and 43223 transitions. [2020-10-27 19:12:03,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 19:12:03,293 INFO L276 IsEmpty]: Start isEmpty. Operand 33550 states and 43223 transitions. [2020-10-27 19:12:03,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2020-10-27 19:12:03,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:12:03,317 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:12:03,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 19:12:03,317 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:12:03,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:12:03,318 INFO L82 PathProgramCache]: Analyzing trace with hash -215361750, now seen corresponding path program 1 times [2020-10-27 19:12:03,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:12:03,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777767649] [2020-10-27 19:12:03,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:12:03,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:12:03,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:12:03,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:12:04,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:12:05,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:12:05,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 373 [2020-10-27 19:12:05,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:12:05,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2446 [2020-10-27 19:12:05,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:12:05,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:12:05,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 98 [2020-10-27 19:12:05,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 19:12:05,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:12:05,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:12:05,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:12:05,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:12:05,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:12:05,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:12:05,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:12:05,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:12:05,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:12:05,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:12:05,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:12:05,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:12:05,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:12:05,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:12:06,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:12:06,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:12:06,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:12:06,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 19:12:06,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:12:06,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-27 19:12:06,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:12:06,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:12:06,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:12:06,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-27 19:12:06,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:12:06,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-10-27 19:12:06,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:12:06,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:12:06,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:12:06,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:12:06,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 214 [2020-10-27 19:12:06,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:12:06,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 418 [2020-10-27 19:12:06,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:12:06,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:12:06,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 19:12:06,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 214 [2020-10-27 19:12:06,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:12:07,422 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 185 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 19:12:07,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777767649] [2020-10-27 19:12:07,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:12:07,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 19:12:07,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099725557] [2020-10-27 19:12:07,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:12:07,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:12:07,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:12:07,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:12:07,425 INFO L87 Difference]: Start difference. First operand 33550 states and 43223 transitions. Second operand 6 states. [2020-10-27 19:12:17,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:12:17,132 INFO L93 Difference]: Finished difference Result 67133 states and 86646 transitions. [2020-10-27 19:12:17,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:12:17,135 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 359 [2020-10-27 19:12:17,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:12:17,258 INFO L225 Difference]: With dead ends: 67133 [2020-10-27 19:12:17,259 INFO L226 Difference]: Without dead ends: 33571 [2020-10-27 19:12:17,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:12:17,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33571 states. [2020-10-27 19:12:18,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33571 to 33550. [2020-10-27 19:12:18,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33550 states. [2020-10-27 19:12:18,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33550 states to 33550 states and 43205 transitions. [2020-10-27 19:12:18,221 INFO L78 Accepts]: Start accepts. Automaton has 33550 states and 43205 transitions. Word has length 359 [2020-10-27 19:12:18,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:12:18,222 INFO L481 AbstractCegarLoop]: Abstraction has 33550 states and 43205 transitions. [2020-10-27 19:12:18,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:12:18,222 INFO L276 IsEmpty]: Start isEmpty. Operand 33550 states and 43205 transitions. [2020-10-27 19:12:18,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2020-10-27 19:12:18,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:12:18,249 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:12:18,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 19:12:18,249 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:12:18,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:12:18,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1385042616, now seen corresponding path program 1 times [2020-10-27 19:12:18,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:12:18,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688688821] [2020-10-27 19:12:18,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:12:18,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:12:18,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:12:18,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:12:20,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:12:20,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 374 [2020-10-27 19:12:20,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:12:20,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2010 [2020-10-27 19:12:20,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:12:20,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:12:20,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 99 [2020-10-27 19:12:20,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 216 [2020-10-27 19:12:20,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:12:20,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:12:20,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:12:20,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:12:20,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:12:20,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:12:20,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:12:20,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:12:20,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:12:20,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:12:20,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:12:20,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:12:20,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:12:20,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:12:20,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:12:20,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:12:20,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:12:20,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 19:12:20,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:12:20,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-27 19:12:20,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:12:20,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:12:20,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:12:20,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-27 19:12:20,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:12:20,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-10-27 19:12:20,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:12:20,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:12:20,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:12:20,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 214 [2020-10-27 19:12:20,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:12:20,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-27 19:12:20,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:12:20,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:12:20,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 19:12:20,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 214 [2020-10-27 19:12:20,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:12:21,084 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 186 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 19:12:21,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688688821] [2020-10-27 19:12:21,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:12:21,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 19:12:21,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138120221] [2020-10-27 19:12:21,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 19:12:21,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:12:21,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 19:12:21,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:12:21,087 INFO L87 Difference]: Start difference. First operand 33550 states and 43205 transitions. Second operand 7 states. [2020-10-27 19:12:42,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:12:42,009 INFO L93 Difference]: Finished difference Result 76712 states and 101280 transitions. [2020-10-27 19:12:42,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 19:12:42,012 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 360 [2020-10-27 19:12:42,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted.