/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=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-fpi/brs4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:36:58,047 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:36:58,050 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:36:58,085 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:36:58,086 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:36:58,088 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:36:58,090 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:36:58,092 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:36:58,095 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:36:58,096 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:36:58,098 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:36:58,099 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:36:58,100 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:36:58,101 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:36:58,103 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:36:58,104 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:36:58,106 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:36:58,107 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:36:58,110 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:36:58,112 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:36:58,114 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:36:58,116 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:36:58,118 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:36:58,144 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:36:58,148 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:36:58,149 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:36:58,149 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:36:58,151 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:36:58,151 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:36:58,152 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:36:58,153 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:36:58,161 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:36:58,162 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:36:58,163 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:36:58,164 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:36:58,165 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:36:58,171 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:36:58,172 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:36:58,172 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:36:58,174 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:36:58,175 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:36:58,181 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 [2020-10-26 19:36:58,211 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:36:58,211 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:36:58,213 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:36:58,213 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:36:58,213 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:36:58,213 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:36:58,214 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:36:58,214 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:36:58,214 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:36:58,214 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:36:58,215 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:36:58,215 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:36:58,215 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:36:58,215 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:36:58,216 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:36:58,216 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:36:58,216 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:36:58,216 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:36:58,217 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:36:58,217 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:36:58,217 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:36:58,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:36:58,218 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:36:58,218 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:36:58,218 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:36:58,218 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:36:58,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:36:58,219 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:36:58,219 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:36:58,219 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:36:58,673 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:36:58,707 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:36:58,711 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:36:58,712 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:36:58,713 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:36:58,715 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs4.c [2020-10-26 19:36:58,802 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a541a7f6c/fe5a4f7c4bc14e8c9d949d85c12c55da/FLAG512f55a29 [2020-10-26 19:36:59,550 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:36:59,551 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs4.c [2020-10-26 19:36:59,559 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a541a7f6c/fe5a4f7c4bc14e8c9d949d85c12c55da/FLAG512f55a29 [2020-10-26 19:36:59,867 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a541a7f6c/fe5a4f7c4bc14e8c9d949d85c12c55da [2020-10-26 19:36:59,872 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:36:59,881 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:36:59,885 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:36:59,885 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:36:59,890 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:36:59,891 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:36:59" (1/1) ... [2020-10-26 19:36:59,895 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74b374bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:36:59, skipping insertion in model container [2020-10-26 19:36:59,896 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:36:59" (1/1) ... [2020-10-26 19:36:59,904 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:36:59,934 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:37:00,155 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:37:00,169 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:37:00,204 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:37:00,224 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:37:00,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:00 WrapperNode [2020-10-26 19:37:00,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:37:00,227 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:37:00,227 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:37:00,227 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:37:00,242 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:00" (1/1) ... [2020-10-26 19:37:00,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:00" (1/1) ... [2020-10-26 19:37:00,251 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:00" (1/1) ... [2020-10-26 19:37:00,251 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:00" (1/1) ... [2020-10-26 19:37:00,281 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:00" (1/1) ... [2020-10-26 19:37:00,292 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:00" (1/1) ... [2020-10-26 19:37:00,297 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:00" (1/1) ... [2020-10-26 19:37:00,303 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:37:00,304 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:37:00,304 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:37:00,304 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:37:00,322 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:00" (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 [2020-10-26 19:37:00,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:37:00,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:37:00,421 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:37:00,421 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-26 19:37:00,422 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:37:00,422 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:37:00,422 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:37:00,422 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:37:00,422 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:37:00,422 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:37:00,423 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-26 19:37:00,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:37:00,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:37:00,423 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-26 19:37:00,423 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:37:00,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-26 19:37:00,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:37:00,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:37:00,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:37:00,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:37:00,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:37:00,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:37:00,872 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:37:00,873 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-26 19:37:00,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:37:00 BoogieIcfgContainer [2020-10-26 19:37:00,875 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:37:00,877 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:37:00,877 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:37:00,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:37:00,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:36:59" (1/3) ... [2020-10-26 19:37:00,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@133a8ce8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:37:00, skipping insertion in model container [2020-10-26 19:37:00,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:37:00" (2/3) ... [2020-10-26 19:37:00,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@133a8ce8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:37:00, skipping insertion in model container [2020-10-26 19:37:00,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:37:00" (3/3) ... [2020-10-26 19:37:00,884 INFO L111 eAbstractionObserver]: Analyzing ICFG brs4.c [2020-10-26 19:37:00,898 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:37:00,903 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:37:00,918 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:37:00,946 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:37:00,947 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:37:00,947 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:37:00,947 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:37:00,947 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:37:00,947 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:37:00,947 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:37:00,948 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:37:00,966 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-26 19:37:00,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 19:37:00,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:00,974 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:00,975 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:00,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:00,982 INFO L82 PathProgramCache]: Analyzing trace with hash 288317380, now seen corresponding path program 1 times [2020-10-26 19:37:00,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:00,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006891781] [2020-10-26 19:37:00,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:01,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:01,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:01,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:01,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:01,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:01,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:37:01,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:37:01,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 343 [2020-10-26 19:37:01,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:01,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:01,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-26 19:37:01,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:01,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:37:01,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:01,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:01,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:01,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:01,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:01,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:01,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-26 19:37:01,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:01,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:01,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:01,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:01,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:37:01,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:01,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:01,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:01,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:01,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:01,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:01,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 19:37:01,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:01,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:01,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-26 19:37:01,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:01,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:37:01,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:37:01,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006891781] [2020-10-26 19:37:01,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:37:01,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 19:37:01,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55909420] [2020-10-26 19:37:01,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 19:37:01,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:01,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 19:37:01,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:37:01,789 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-10-26 19:37:01,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:01,910 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2020-10-26 19:37:01,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:37:01,912 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-10-26 19:37:01,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:01,921 INFO L225 Difference]: With dead ends: 61 [2020-10-26 19:37:01,921 INFO L226 Difference]: Without dead ends: 27 [2020-10-26 19:37:01,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:37:01,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-26 19:37:01,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-26 19:37:01,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-26 19:37:01,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-26 19:37:01,976 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 22 [2020-10-26 19:37:01,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:01,976 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-26 19:37:01,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 19:37:01,977 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-26 19:37:01,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 19:37:01,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:01,978 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:01,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:37:01,979 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:01,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:01,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1231035376, now seen corresponding path program 1 times [2020-10-26 19:37:01,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:01,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729415068] [2020-10-26 19:37:01,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:02,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:02,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:02,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:02,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:02,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:37:02,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:37:02,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 329 [2020-10-26 19:37:02,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:02,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:37:02,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:37:02,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:37:02,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:02,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:02,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:02,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:02,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:02,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:02,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:02,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:37:02,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:02,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:02,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:02,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:02,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:37:02,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:02,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:02,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:02,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:02,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:02,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:02,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:37:02,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:02,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:37:02,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:02,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:37:02,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:37:02,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:37:02,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729415068] [2020-10-26 19:37:02,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:37:02,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 19:37:02,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298189455] [2020-10-26 19:37:02,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:37:02,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:02,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:37:02,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:37:02,481 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 5 states. [2020-10-26 19:37:02,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:02,694 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-10-26 19:37:02,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:37:02,695 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-26 19:37:02,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:02,696 INFO L225 Difference]: With dead ends: 40 [2020-10-26 19:37:02,696 INFO L226 Difference]: Without dead ends: 29 [2020-10-26 19:37:02,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:37:02,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-26 19:37:02,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-26 19:37:02,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-26 19:37:02,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-26 19:37:02,708 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 22 [2020-10-26 19:37:02,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:02,709 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-26 19:37:02,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:37:02,709 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-26 19:37:02,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 19:37:02,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:02,710 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:02,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:37:02,711 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:02,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:02,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1214934215, now seen corresponding path program 1 times [2020-10-26 19:37:02,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:02,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167632252] [2020-10-26 19:37:02,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:02,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:02,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:02,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:02,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:03,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:03,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:37:03,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:37:03,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1106 [2020-10-26 19:37:03,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:03,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:37:03,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:37:03,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:37:03,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:03,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:03,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:03,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:04,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:04,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:04,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:04,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:37:04,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:04,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:04,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:04,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:04,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:04,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:04,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:04,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:04,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:04,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:04,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:04,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:37:04,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:04,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:37:04,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:04,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:37:04,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:04,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:37:04,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167632252] [2020-10-26 19:37:04,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:04,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:37:04,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413285787] [2020-10-26 19:37:04,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:37:04,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:04,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:37:04,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:37:04,022 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 10 states. [2020-10-26 19:37:04,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:04,477 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2020-10-26 19:37:04,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:37:04,477 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-26 19:37:04,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:04,479 INFO L225 Difference]: With dead ends: 69 [2020-10-26 19:37:04,479 INFO L226 Difference]: Without dead ends: 57 [2020-10-26 19:37:04,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:37:04,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-26 19:37:04,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2020-10-26 19:37:04,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-26 19:37:04,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2020-10-26 19:37:04,505 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 28 [2020-10-26 19:37:04,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:04,507 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2020-10-26 19:37:04,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:37:04,507 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2020-10-26 19:37:04,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 19:37:04,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:04,509 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:04,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:37:04,511 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:04,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:04,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1894992585, now seen corresponding path program 1 times [2020-10-26 19:37:04,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:04,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647427951] [2020-10-26 19:37:04,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:04,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:04,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:04,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:04,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:05,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:05,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:37:05,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:37:05,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 780 [2020-10-26 19:37:05,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:05,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:37:05,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:37:05,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:37:05,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:05,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:05,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:05,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:05,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:05,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:05,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:05,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:37:05,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:05,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:05,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:05,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:05,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:05,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:05,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:05,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:05,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:05,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:05,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:05,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:37:05,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:05,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:37:05,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:05,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:37:05,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:05,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:37:05,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647427951] [2020-10-26 19:37:05,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:37:05,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-26 19:37:05,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879075919] [2020-10-26 19:37:05,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:37:05,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:05,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:37:05,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:37:05,479 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand 8 states. [2020-10-26 19:37:05,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:05,792 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2020-10-26 19:37:05,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:37:05,794 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-26 19:37:05,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:05,796 INFO L225 Difference]: With dead ends: 53 [2020-10-26 19:37:05,796 INFO L226 Difference]: Without dead ends: 39 [2020-10-26 19:37:05,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:37:05,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-26 19:37:05,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-26 19:37:05,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-26 19:37:05,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-10-26 19:37:05,827 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 28 [2020-10-26 19:37:05,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:05,829 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-10-26 19:37:05,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:37:05,829 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-10-26 19:37:05,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 19:37:05,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:05,831 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:05,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:37:05,831 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:05,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:05,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1229914284, now seen corresponding path program 1 times [2020-10-26 19:37:05,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:05,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787028669] [2020-10-26 19:37:05,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:05,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:05,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:06,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:06,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:06,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:06,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:07,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:07,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:07,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:07,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:07,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:08,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:08,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:08,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:08,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:08,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:09,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:09,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:09,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:09,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:09,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:09,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:10,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:10,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:37:10,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-26 19:37:10,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:37:10,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:10,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:37:10,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:37:10,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:37:10,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:11,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:11,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:11,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:11,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:11,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:11,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:11,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:37:11,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:11,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:11,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:11,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:11,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:11,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:11,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:11,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:11,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:11,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:11,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:11,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:37:11,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:11,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:37:11,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:11,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:37:11,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:11,592 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:37:11,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787028669] [2020-10-26 19:37:11,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:11,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:37:11,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412323687] [2020-10-26 19:37:11,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:37:11,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:11,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:37:11,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:37:11,595 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 17 states. [2020-10-26 19:37:12,569 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2020-10-26 19:37:13,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:13,587 INFO L93 Difference]: Finished difference Result 86 states and 104 transitions. [2020-10-26 19:37:13,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:37:13,587 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2020-10-26 19:37:13,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:13,591 INFO L225 Difference]: With dead ends: 86 [2020-10-26 19:37:13,591 INFO L226 Difference]: Without dead ends: 79 [2020-10-26 19:37:13,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=239, Invalid=1093, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:37:13,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-26 19:37:13,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 60. [2020-10-26 19:37:13,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-26 19:37:13,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2020-10-26 19:37:13,607 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 34 [2020-10-26 19:37:13,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:13,608 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2020-10-26 19:37:13,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:37:13,608 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2020-10-26 19:37:13,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 19:37:13,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:13,609 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:13,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:37:13,610 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:13,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:13,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1090575102, now seen corresponding path program 2 times [2020-10-26 19:37:13,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:13,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046043028] [2020-10-26 19:37:13,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:13,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:13,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:13,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:13,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:13,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:14,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:14,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:14,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:14,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:14,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:14,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:16,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:16,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:17,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:18,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:18,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:18,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:18,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:18,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 19:37:18,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-26 19:37:18,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-26 19:37:18,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:18,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:37:18,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:37:18,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 19:37:18,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:18,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:18,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:18,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:18,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:18,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:18,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:18,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:37:18,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:18,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:18,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:18,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:18,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:18,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:18,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:18,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:18,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:18,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:18,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:37:18,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:18,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:37:18,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:18,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:37:18,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:18,933 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:37:18,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046043028] [2020-10-26 19:37:18,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:18,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:37:18,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764607312] [2020-10-26 19:37:18,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:37:18,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:18,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:37:18,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:37:18,937 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand 13 states. [2020-10-26 19:37:19,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:19,614 INFO L93 Difference]: Finished difference Result 99 states and 123 transitions. [2020-10-26 19:37:19,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:37:19,615 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-10-26 19:37:19,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:19,616 INFO L225 Difference]: With dead ends: 99 [2020-10-26 19:37:19,616 INFO L226 Difference]: Without dead ends: 80 [2020-10-26 19:37:19,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=181, Invalid=521, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:37:19,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-26 19:37:19,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 63. [2020-10-26 19:37:19,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-26 19:37:19,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 79 transitions. [2020-10-26 19:37:19,629 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 79 transitions. Word has length 37 [2020-10-26 19:37:19,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:19,629 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 79 transitions. [2020-10-26 19:37:19,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:37:19,630 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 79 transitions. [2020-10-26 19:37:19,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 19:37:19,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:19,631 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:19,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:37:19,631 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:19,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:19,632 INFO L82 PathProgramCache]: Analyzing trace with hash -99928167, now seen corresponding path program 3 times [2020-10-26 19:37:19,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:19,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615381993] [2020-10-26 19:37:19,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:19,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:19,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:19,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:19,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:19,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:19,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:19,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:20,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:20,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:20,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:20,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:20,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:20,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:20,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:20,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:20,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:21,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:22,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:22,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:22,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:23,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:23,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:24,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:24,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:24,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 19:37:24,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-26 19:37:24,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:37:24,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:24,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:37:24,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:37:24,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 19:37:24,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:24,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:24,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:24,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:24,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:24,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:24,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:24,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:37:24,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:24,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:24,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:24,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:24,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:24,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:24,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:24,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:24,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:24,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:24,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:24,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:37:24,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:24,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:37:24,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:24,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:37:24,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:24,976 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:37:24,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615381993] [2020-10-26 19:37:24,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:24,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:37:24,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213137778] [2020-10-26 19:37:24,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:37:24,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:24,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:37:24,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:37:24,980 INFO L87 Difference]: Start difference. First operand 63 states and 79 transitions. Second operand 13 states. [2020-10-26 19:37:26,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:26,527 INFO L93 Difference]: Finished difference Result 204 states and 264 transitions. [2020-10-26 19:37:26,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:37:26,527 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-10-26 19:37:26,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:26,529 INFO L225 Difference]: With dead ends: 204 [2020-10-26 19:37:26,530 INFO L226 Difference]: Without dead ends: 177 [2020-10-26 19:37:26,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=432, Invalid=1460, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:37:26,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-26 19:37:26,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 108. [2020-10-26 19:37:26,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-26 19:37:26,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 141 transitions. [2020-10-26 19:37:26,552 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 141 transitions. Word has length 37 [2020-10-26 19:37:26,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:26,552 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 141 transitions. [2020-10-26 19:37:26,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:37:26,552 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 141 transitions. [2020-10-26 19:37:26,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 19:37:26,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:26,554 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:26,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:37:26,555 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:26,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:26,555 INFO L82 PathProgramCache]: Analyzing trace with hash -264327849, now seen corresponding path program 4 times [2020-10-26 19:37:26,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:26,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855031586] [2020-10-26 19:37:26,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:26,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:26,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:26,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:26,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:27,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:27,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:27,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:28,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:28,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:29,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:29,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:29,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:29,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:29,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:30,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:30,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:31,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:31,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:37:31,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-26 19:37:31,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:37:31,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:31,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:37:31,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:37:31,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:37:31,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:32,391 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2020-10-26 19:37:32,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:32,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:32,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:32,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:32,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:32,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:32,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:37:32,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:32,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:32,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:32,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:32,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:32,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:32,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:32,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:32,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:32,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:32,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:32,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 19:37:32,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:32,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:37:32,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:32,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:37:32,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:32,769 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:37:32,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855031586] [2020-10-26 19:37:32,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:32,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:37:32,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93628158] [2020-10-26 19:37:32,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:37:32,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:32,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:37:32,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:37:32,773 INFO L87 Difference]: Start difference. First operand 108 states and 141 transitions. Second operand 20 states. [2020-10-26 19:37:33,150 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-26 19:37:33,402 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-10-26 19:37:33,869 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-10-26 19:37:34,166 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2020-10-26 19:37:35,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:35,112 INFO L93 Difference]: Finished difference Result 147 states and 189 transitions. [2020-10-26 19:37:35,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:37:35,113 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 40 [2020-10-26 19:37:35,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:35,115 INFO L225 Difference]: With dead ends: 147 [2020-10-26 19:37:35,115 INFO L226 Difference]: Without dead ends: 138 [2020-10-26 19:37:35,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=286, Invalid=1274, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:37:35,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-26 19:37:35,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 125. [2020-10-26 19:37:35,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-26 19:37:35,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 163 transitions. [2020-10-26 19:37:35,156 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 163 transitions. Word has length 40 [2020-10-26 19:37:35,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:35,157 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 163 transitions. [2020-10-26 19:37:35,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:37:35,157 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 163 transitions. [2020-10-26 19:37:35,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 19:37:35,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:35,160 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:35,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:37:35,161 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:35,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:35,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1454831118, now seen corresponding path program 5 times [2020-10-26 19:37:35,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:35,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537146985] [2020-10-26 19:37:35,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:35,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:35,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:35,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:35,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:35,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:35,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:35,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:35,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:35,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:35,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:35,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:36,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:36,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:36,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:36,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:37,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:37,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:37,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:37,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:37,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:37,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:38,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:38,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:39,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:39,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:39,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:39,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:40,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:40,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:37:40,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 26 [2020-10-26 19:37:40,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:37:40,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:40,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:37:40,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:37:40,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:37:40,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:40,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:40,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:40,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:40,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:40,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:40,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:40,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:37:40,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:40,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:40,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:40,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:40,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:40,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:40,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:40,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:40,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:40,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:40,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:40,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:37:40,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:40,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:37:40,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:40,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:37:40,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:40,485 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:37:40,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537146985] [2020-10-26 19:37:40,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:40,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:37:40,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505179440] [2020-10-26 19:37:40,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:37:40,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:40,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:37:40,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:37:40,492 INFO L87 Difference]: Start difference. First operand 125 states and 163 transitions. Second operand 14 states. [2020-10-26 19:37:42,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:42,437 INFO L93 Difference]: Finished difference Result 364 states and 482 transitions. [2020-10-26 19:37:42,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:37:42,437 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2020-10-26 19:37:42,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:42,439 INFO L225 Difference]: With dead ends: 364 [2020-10-26 19:37:42,440 INFO L226 Difference]: Without dead ends: 254 [2020-10-26 19:37:42,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=536, Invalid=1626, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:37:42,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-26 19:37:42,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 99. [2020-10-26 19:37:42,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-26 19:37:42,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 131 transitions. [2020-10-26 19:37:42,462 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 131 transitions. Word has length 40 [2020-10-26 19:37:42,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:42,462 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 131 transitions. [2020-10-26 19:37:42,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:37:42,462 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 131 transitions. [2020-10-26 19:37:42,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:37:42,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:42,464 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:42,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:37:42,465 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:42,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:42,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1529169449, now seen corresponding path program 6 times [2020-10-26 19:37:42,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:42,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408581518] [2020-10-26 19:37:42,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:42,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:42,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:42,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:42,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:42,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:42,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:42,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:44,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:44,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:44,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:45,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:45,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:45,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:45,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:45,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:46,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:46,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:46,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:46,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:47,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:47,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:47,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:47,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:47,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:47,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:47,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:37:47,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-26 19:37:47,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5070 [2020-10-26 19:37:47,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:47,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:37:47,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:37:47,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 19:37:47,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:48,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:48,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:48,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:48,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:48,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:48,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:48,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:37:48,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:48,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:48,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:48,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:48,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:48,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:48,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:48,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:48,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:48,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:48,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:48,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:37:48,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:48,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:37:48,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:48,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:37:48,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:48,155 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:37:48,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408581518] [2020-10-26 19:37:48,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:48,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:37:48,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649670241] [2020-10-26 19:37:48,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:37:48,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:48,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:37:48,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:37:48,158 INFO L87 Difference]: Start difference. First operand 99 states and 131 transitions. Second operand 21 states. [2020-10-26 19:37:50,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:50,405 INFO L93 Difference]: Finished difference Result 219 states and 296 transitions. [2020-10-26 19:37:50,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:37:50,406 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 43 [2020-10-26 19:37:50,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:50,407 INFO L225 Difference]: With dead ends: 219 [2020-10-26 19:37:50,408 INFO L226 Difference]: Without dead ends: 129 [2020-10-26 19:37:50,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=414, Invalid=1748, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:37:50,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-26 19:37:50,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 61. [2020-10-26 19:37:50,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-26 19:37:50,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2020-10-26 19:37:50,423 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 43 [2020-10-26 19:37:50,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:50,423 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2020-10-26 19:37:50,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:37:50,424 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2020-10-26 19:37:50,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:37:50,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:50,425 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:50,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:37:50,426 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:50,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:50,426 INFO L82 PathProgramCache]: Analyzing trace with hash -814888421, now seen corresponding path program 7 times [2020-10-26 19:37:50,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:50,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342879582] [2020-10-26 19:37:50,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:50,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:50,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:50,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:50,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:50,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:50,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:50,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:51,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:51,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:52,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:52,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:52,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:52,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:53,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:53,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:55,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:55,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:37:55,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-26 19:37:55,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:37:55,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:55,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:37:55,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:37:55,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 19:37:55,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:55,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:55,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:55,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:55,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:55,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:55,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:55,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:37:55,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:55,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:55,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:55,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:55,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:55,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:55,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:55,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:55,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:55,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:55,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:55,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:37:55,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:55,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:37:55,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:55,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:37:55,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:55,792 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:37:55,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342879582] [2020-10-26 19:37:55,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:55,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:37:55,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890097882] [2020-10-26 19:37:55,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:37:55,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:55,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:37:55,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:37:55,794 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand 16 states. [2020-10-26 19:37:56,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:56,863 INFO L93 Difference]: Finished difference Result 121 states and 145 transitions. [2020-10-26 19:37:56,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:37:56,864 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-10-26 19:37:56,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:56,866 INFO L225 Difference]: With dead ends: 121 [2020-10-26 19:37:56,866 INFO L226 Difference]: Without dead ends: 99 [2020-10-26 19:37:56,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=282, Invalid=908, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:37:56,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-26 19:37:56,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 84. [2020-10-26 19:37:56,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-26 19:37:56,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2020-10-26 19:37:56,883 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 43 [2020-10-26 19:37:56,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:56,883 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2020-10-26 19:37:56,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:37:56,884 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2020-10-26 19:37:56,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:37:56,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:56,885 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:56,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:37:56,885 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:56,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:56,886 INFO L82 PathProgramCache]: Analyzing trace with hash 742155168, now seen corresponding path program 8 times [2020-10-26 19:37:56,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:56,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627407898] [2020-10-26 19:37:56,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:56,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:56,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:56,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:56,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:56,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:57,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:57,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:57,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:57,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:57,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:57,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:57,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:58,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:58,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:58,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:58,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:58,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:58,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:58,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:58,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:00,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:00,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:00,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:00,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:01,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:01,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:38:01,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-26 19:38:01,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:38:01,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:01,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:38:01,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:38:01,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 19:38:01,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:02,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:02,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:02,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:02,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:02,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:02,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:02,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:38:02,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:02,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:02,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:02,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:02,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:02,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:02,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:02,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:02,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:02,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:02,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:02,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:38:02,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:02,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:02,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:02,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:02,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:02,188 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:38:02,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627407898] [2020-10-26 19:38:02,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:02,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:38:02,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926204103] [2020-10-26 19:38:02,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:38:02,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:02,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:38:02,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:38:02,191 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand 15 states. [2020-10-26 19:38:03,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:03,816 INFO L93 Difference]: Finished difference Result 195 states and 244 transitions. [2020-10-26 19:38:03,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:38:03,817 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-10-26 19:38:03,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:03,818 INFO L225 Difference]: With dead ends: 195 [2020-10-26 19:38:03,818 INFO L226 Difference]: Without dead ends: 174 [2020-10-26 19:38:03,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=572, Invalid=1590, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:38:03,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-26 19:38:03,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 73. [2020-10-26 19:38:03,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-26 19:38:03,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2020-10-26 19:38:03,836 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 43 [2020-10-26 19:38:03,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:03,837 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2020-10-26 19:38:03,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:38:03,837 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2020-10-26 19:38:03,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-26 19:38:03,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:03,839 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:03,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:38:03,839 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:03,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:03,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1651460684, now seen corresponding path program 9 times [2020-10-26 19:38:03,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:03,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954541903] [2020-10-26 19:38:03,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:03,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:03,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:04,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:04,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:04,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:04,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:05,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:07,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:08,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:08,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:08,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:08,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:38:08,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 19:38:08,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5094 [2020-10-26 19:38:08,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:08,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:38:08,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:38:08,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:38:08,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:10,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:10,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:10,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:10,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:10,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:10,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:10,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:38:10,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:10,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:10,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:10,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:10,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:38:10,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:10,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:10,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:10,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:10,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:10,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:10,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:38:10,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:10,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:10,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:10,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:10,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:10,108 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:38:10,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954541903] [2020-10-26 19:38:10,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:10,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:38:10,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939386896] [2020-10-26 19:38:10,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:38:10,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:10,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:38:10,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:38:10,111 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand 25 states. [2020-10-26 19:38:11,031 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 34 [2020-10-26 19:38:13,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:13,319 INFO L93 Difference]: Finished difference Result 160 states and 202 transitions. [2020-10-26 19:38:13,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:38:13,320 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 46 [2020-10-26 19:38:13,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:13,321 INFO L225 Difference]: With dead ends: 160 [2020-10-26 19:38:13,321 INFO L226 Difference]: Without dead ends: 101 [2020-10-26 19:38:13,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=484, Invalid=2486, Unknown=0, NotChecked=0, Total=2970 [2020-10-26 19:38:13,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-26 19:38:13,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 73. [2020-10-26 19:38:13,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-26 19:38:13,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2020-10-26 19:38:13,340 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 46 [2020-10-26 19:38:13,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:13,340 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2020-10-26 19:38:13,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:38:13,341 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2020-10-26 19:38:13,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-26 19:38:13,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:13,342 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:13,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:38:13,343 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:13,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:13,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1286146206, now seen corresponding path program 10 times [2020-10-26 19:38:13,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:13,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376488541] [2020-10-26 19:38:13,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:13,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:13,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:13,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:13,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:13,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:13,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:13,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:13,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:14,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:14,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:14,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:14,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:14,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:15,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:15,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:15,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:15,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:15,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:16,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:16,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:17,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:17,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:18,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:18,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-26 19:38:18,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-26 19:38:18,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:38:18,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:18,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:38:18,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:38:18,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 19:38:18,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:18,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:18,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:18,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:18,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:18,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:18,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:18,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:38:18,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:18,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:18,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:18,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:18,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:18,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:18,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:18,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:18,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:18,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:18,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:18,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:38:18,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:18,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:18,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:18,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:18,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:18,795 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:38:18,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376488541] [2020-10-26 19:38:18,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:18,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:38:18,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333312330] [2020-10-26 19:38:18,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:38:18,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:18,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:38:18,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:38:18,797 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand 19 states. [2020-10-26 19:38:19,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:19,993 INFO L93 Difference]: Finished difference Result 115 states and 132 transitions. [2020-10-26 19:38:19,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:38:19,994 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 49 [2020-10-26 19:38:19,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:19,995 INFO L225 Difference]: With dead ends: 115 [2020-10-26 19:38:19,995 INFO L226 Difference]: Without dead ends: 91 [2020-10-26 19:38:19,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=349, Invalid=1211, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:38:19,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-26 19:38:20,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 76. [2020-10-26 19:38:20,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-26 19:38:20,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2020-10-26 19:38:20,012 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 49 [2020-10-26 19:38:20,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:20,012 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2020-10-26 19:38:20,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:38:20,012 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2020-10-26 19:38:20,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-26 19:38:20,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:20,013 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:20,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:38:20,013 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:20,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:20,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1524909305, now seen corresponding path program 11 times [2020-10-26 19:38:20,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:20,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829811249] [2020-10-26 19:38:20,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:20,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:20,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:20,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:20,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:20,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:20,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:20,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:20,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:20,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:20,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:20,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:20,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:20,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:20,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:21,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:21,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:21,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:21,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:21,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:21,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:21,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:21,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:21,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:22,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:22,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:22,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:22,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:23,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:23,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:24,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:24,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:24,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:25,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:25,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-26 19:38:25,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 31 [2020-10-26 19:38:25,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-26 19:38:25,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:25,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:38:25,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:38:25,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-26 19:38:25,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:25,651 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2020-10-26 19:38:25,829 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2020-10-26 19:38:25,976 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2020-10-26 19:38:26,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:26,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:26,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:26,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:26,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:26,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:26,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:38:26,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:26,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:26,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:26,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:26,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:26,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:26,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:26,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:26,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:26,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:26,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:26,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:38:26,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:26,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:26,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:26,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:26,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:26,528 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 35 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-26 19:38:26,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829811249] [2020-10-26 19:38:26,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:26,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:38:26,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892058863] [2020-10-26 19:38:26,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:38:26,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:26,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:38:26,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:38:26,530 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand 24 states. [2020-10-26 19:38:27,831 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 53 [2020-10-26 19:38:28,365 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-10-26 19:38:28,654 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2020-10-26 19:38:28,906 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-26 19:38:29,072 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-26 19:38:29,329 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-10-26 19:38:29,982 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-10-26 19:38:30,147 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-10-26 19:38:30,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:30,371 INFO L93 Difference]: Finished difference Result 109 states and 125 transitions. [2020-10-26 19:38:30,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:38:30,371 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 49 [2020-10-26 19:38:30,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:30,373 INFO L225 Difference]: With dead ends: 109 [2020-10-26 19:38:30,373 INFO L226 Difference]: Without dead ends: 102 [2020-10-26 19:38:30,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=397, Invalid=2359, Unknown=0, NotChecked=0, Total=2756 [2020-10-26 19:38:30,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-26 19:38:30,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2020-10-26 19:38:30,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-26 19:38:30,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 110 transitions. [2020-10-26 19:38:30,391 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 110 transitions. Word has length 49 [2020-10-26 19:38:30,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:30,391 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 110 transitions. [2020-10-26 19:38:30,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:38:30,391 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 110 transitions. [2020-10-26 19:38:30,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 19:38:30,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:30,392 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:30,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:38:30,392 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:30,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:30,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1805023033, now seen corresponding path program 12 times [2020-10-26 19:38:30,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:30,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658501638] [2020-10-26 19:38:30,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:30,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:30,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:30,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:31,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:31,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:32,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:32,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:32,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:33,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:33,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:34,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:34,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:35,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:35,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:35,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:38:35,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-26 19:38:35,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5069 [2020-10-26 19:38:35,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:35,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:38:35,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:38:35,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:38:35,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:35,909 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2020-10-26 19:38:36,035 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2020-10-26 19:38:36,163 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2020-10-26 19:38:36,591 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 49 [2020-10-26 19:38:36,813 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2020-10-26 19:38:37,059 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2020-10-26 19:38:37,295 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2020-10-26 19:38:37,587 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 59 [2020-10-26 19:38:37,741 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-10-26 19:38:37,953 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-10-26 19:38:38,102 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-26 19:38:38,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:38,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:38,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:38,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:38,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:38,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:38,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:38:38,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:38,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:38,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:38,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:38,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:38,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:38,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:38,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:38,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:38,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:38,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:38,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:38:38,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:38,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:38,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:38,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:38,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:38,561 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 20 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:38:38,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658501638] [2020-10-26 19:38:38,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:38,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:38:38,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535096869] [2020-10-26 19:38:38,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:38:38,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:38,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:38:38,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:38:38,564 INFO L87 Difference]: Start difference. First operand 94 states and 110 transitions. Second operand 28 states. [2020-10-26 19:38:40,688 WARN L193 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 81 [2020-10-26 19:38:41,180 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 57 [2020-10-26 19:38:42,208 WARN L193 SmtUtils]: Spent 958.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 112 [2020-10-26 19:38:43,317 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 144 DAG size of output: 116 [2020-10-26 19:38:43,540 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-10-26 19:38:44,228 WARN L193 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 93 [2020-10-26 19:38:45,489 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 147 DAG size of output: 119 [2020-10-26 19:38:45,934 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-10-26 19:38:46,539 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 98 [2020-10-26 19:38:47,200 WARN L193 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 76 [2020-10-26 19:38:48,439 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 150 DAG size of output: 122 [2020-10-26 19:38:49,018 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-10-26 19:38:49,570 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 88 [2020-10-26 19:38:49,957 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2020-10-26 19:38:50,510 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 89 [2020-10-26 19:38:50,701 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-10-26 19:38:50,956 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-26 19:38:51,275 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-26 19:38:52,426 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 141 DAG size of output: 113 [2020-10-26 19:38:53,560 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 143 DAG size of output: 115 [2020-10-26 19:38:53,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:53,850 INFO L93 Difference]: Finished difference Result 132 states and 153 transitions. [2020-10-26 19:38:53,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-26 19:38:53,852 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 52 [2020-10-26 19:38:53,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:53,853 INFO L225 Difference]: With dead ends: 132 [2020-10-26 19:38:53,853 INFO L226 Difference]: Without dead ends: 125 [2020-10-26 19:38:53,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=551, Invalid=3739, Unknown=0, NotChecked=0, Total=4290 [2020-10-26 19:38:53,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-26 19:38:53,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 111. [2020-10-26 19:38:53,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-26 19:38:53,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 131 transitions. [2020-10-26 19:38:53,885 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 131 transitions. Word has length 52 [2020-10-26 19:38:53,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:53,885 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 131 transitions. [2020-10-26 19:38:53,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:38:53,885 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 131 transitions. [2020-10-26 19:38:53,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 19:38:53,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:53,886 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:53,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:38:53,886 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:53,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:53,887 INFO L82 PathProgramCache]: Analyzing trace with hash 2043786132, now seen corresponding path program 13 times [2020-10-26 19:38:53,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:53,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050894082] [2020-10-26 19:38:53,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:53,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:53,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:53,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:53,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:54,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:54,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:54,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:54,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:54,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:54,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:54,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:55,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:55,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:55,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:55,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:55,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:55,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:55,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:55,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:55,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:55,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:56,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:56,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:56,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:56,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:56,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:57,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:57,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:57,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:57,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:58,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:58,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:58,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:58,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:58,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:58,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:38:58,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 33 [2020-10-26 19:38:58,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:38:58,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:58,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:38:58,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:38:58,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:38:58,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:59,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:59,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:59,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:59,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:59,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:59,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:59,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:38:59,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:59,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:59,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:59,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:59,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:59,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:59,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:59,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:59,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:59,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:59,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:59,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:38:59,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:59,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:59,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:59,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:59,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:59,254 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 11 proven. 53 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-26 19:38:59,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050894082] [2020-10-26 19:38:59,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:59,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:38:59,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063573499] [2020-10-26 19:38:59,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:38:59,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:59,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:38:59,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:38:59,261 INFO L87 Difference]: Start difference. First operand 111 states and 131 transitions. Second operand 16 states. [2020-10-26 19:38:59,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:59,993 INFO L93 Difference]: Finished difference Result 159 states and 188 transitions. [2020-10-26 19:38:59,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:38:59,994 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 52 [2020-10-26 19:38:59,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:59,995 INFO L225 Difference]: With dead ends: 159 [2020-10-26 19:38:59,995 INFO L226 Difference]: Without dead ends: 127 [2020-10-26 19:38:59,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:38:59,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-26 19:39:00,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 77. [2020-10-26 19:39:00,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-26 19:39:00,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2020-10-26 19:39:00,014 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 52 [2020-10-26 19:39:00,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:00,015 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2020-10-26 19:39:00,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:39:00,015 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2020-10-26 19:39:00,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-26 19:39:00,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:00,016 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:00,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:39:00,016 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:00,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:00,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1551637753, now seen corresponding path program 14 times [2020-10-26 19:39:00,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:00,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377052935] [2020-10-26 19:39:00,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:00,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:00,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:00,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:00,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:00,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:00,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:00,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:00,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:00,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:00,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:00,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:01,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:01,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:01,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:02,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:02,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:02,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:02,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:02,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:02,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:03,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:03,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:03,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:04,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:04,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:04,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:05,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:05,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-26 19:39:05,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-10-26 19:39:05,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:39:05,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:05,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:39:05,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:39:05,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-26 19:39:05,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:05,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:05,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:05,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:05,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:05,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:05,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:05,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:39:05,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:05,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:05,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:05,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:05,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:05,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:05,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:05,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:05,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:05,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:05,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:05,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:39:05,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:05,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:39:05,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:05,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:39:05,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:05,888 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 13 proven. 71 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:39:05,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377052935] [2020-10-26 19:39:05,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:05,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:39:05,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673017612] [2020-10-26 19:39:05,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:39:05,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:05,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:39:05,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:39:05,891 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand 22 states. [2020-10-26 19:39:07,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:07,352 INFO L93 Difference]: Finished difference Result 150 states and 167 transitions. [2020-10-26 19:39:07,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:39:07,352 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 55 [2020-10-26 19:39:07,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:07,354 INFO L225 Difference]: With dead ends: 150 [2020-10-26 19:39:07,354 INFO L226 Difference]: Without dead ends: 123 [2020-10-26 19:39:07,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=465, Invalid=1697, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:39:07,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-26 19:39:07,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 99. [2020-10-26 19:39:07,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-26 19:39:07,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 114 transitions. [2020-10-26 19:39:07,378 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 114 transitions. Word has length 55 [2020-10-26 19:39:07,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:07,378 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 114 transitions. [2020-10-26 19:39:07,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:39:07,378 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 114 transitions. [2020-10-26 19:39:07,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-26 19:39:07,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:07,379 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:07,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:39:07,379 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:07,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:07,380 INFO L82 PathProgramCache]: Analyzing trace with hash 2077277886, now seen corresponding path program 15 times [2020-10-26 19:39:07,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:07,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684703650] [2020-10-26 19:39:07,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:07,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:07,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:07,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:07,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:07,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:07,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:07,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:07,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:08,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:08,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:08,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:08,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:08,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:08,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:08,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:08,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:08,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:08,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:08,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:08,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:09,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:09,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:09,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:11,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:11,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:12,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:12,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-26 19:39:12,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-26 19:39:12,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:39:12,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:12,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:39:12,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:39:12,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:39:12,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:12,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:12,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:12,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:12,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:12,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:12,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:12,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:39:12,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:12,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:12,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:12,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:12,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:12,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:12,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:12,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:12,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:12,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:12,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:12,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:39:12,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:12,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:12,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:12,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:12,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:12,567 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-26 19:39:12,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684703650] [2020-10-26 19:39:12,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:12,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:39:12,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298132153] [2020-10-26 19:39:12,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:39:12,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:12,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:39:12,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:39:12,569 INFO L87 Difference]: Start difference. First operand 99 states and 114 transitions. Second operand 9 states. [2020-10-26 19:39:12,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:12,889 INFO L93 Difference]: Finished difference Result 170 states and 198 transitions. [2020-10-26 19:39:12,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:39:12,890 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-10-26 19:39:12,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:12,891 INFO L225 Difference]: With dead ends: 170 [2020-10-26 19:39:12,891 INFO L226 Difference]: Without dead ends: 92 [2020-10-26 19:39:12,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:39:12,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-26 19:39:12,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 74. [2020-10-26 19:39:12,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-26 19:39:12,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2020-10-26 19:39:12,909 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 55 [2020-10-26 19:39:12,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:12,909 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2020-10-26 19:39:12,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:39:12,910 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2020-10-26 19:39:12,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-26 19:39:12,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:12,911 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:12,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:39:12,911 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:12,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:12,911 INFO L82 PathProgramCache]: Analyzing trace with hash 2139317500, now seen corresponding path program 16 times [2020-10-26 19:39:12,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:12,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174040346] [2020-10-26 19:39:12,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:12,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:12,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:12,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:13,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:13,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:13,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:13,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:13,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:13,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:13,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:13,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:13,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:14,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:14,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:14,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:14,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:14,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:14,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:14,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:14,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:14,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:15,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:15,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:15,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:16,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:16,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:16,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:17,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:17,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-26 19:39:17,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 26 [2020-10-26 19:39:17,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:39:17,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:17,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:39:17,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:39:17,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-26 19:39:17,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:18,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:18,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:18,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:18,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:18,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:18,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:18,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:39:18,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:18,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:18,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:18,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:18,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:18,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:18,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:18,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:18,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:18,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:18,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:18,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:39:18,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:18,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:18,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:18,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:18,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:18,157 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 35 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:39:18,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174040346] [2020-10-26 19:39:18,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:18,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:39:18,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601562660] [2020-10-26 19:39:18,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:39:18,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:18,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:39:18,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:39:18,159 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 16 states. [2020-10-26 19:39:18,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:18,909 INFO L93 Difference]: Finished difference Result 95 states and 104 transitions. [2020-10-26 19:39:18,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:39:18,911 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 55 [2020-10-26 19:39:18,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:18,912 INFO L225 Difference]: With dead ends: 95 [2020-10-26 19:39:18,912 INFO L226 Difference]: Without dead ends: 88 [2020-10-26 19:39:18,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:39:18,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-26 19:39:18,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 60. [2020-10-26 19:39:18,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-26 19:39:18,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-10-26 19:39:18,928 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 55 [2020-10-26 19:39:18,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:18,928 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-10-26 19:39:18,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:39:18,928 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-10-26 19:39:18,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-26 19:39:18,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:18,929 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:18,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:39:18,929 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:18,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:18,930 INFO L82 PathProgramCache]: Analyzing trace with hash 488944726, now seen corresponding path program 17 times [2020-10-26 19:39:18,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:18,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322145642] [2020-10-26 19:39:18,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:18,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:18,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:19,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:19,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:19,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:20,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:20,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:20,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:20,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:23,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:23,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:23,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:23,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 19:39:23,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:39:23,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:39:23,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:23,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:39:23,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:39:23,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:39:23,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:26,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:26,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:26,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:26,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:26,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:26,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:26,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:39:26,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:26,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:26,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:26,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:26,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:26,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:26,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:26,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:26,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:26,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:26,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:39:26,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:26,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:39:26,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:26,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:39:26,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:26,148 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:39:26,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322145642] [2020-10-26 19:39:26,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:26,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:39:26,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257445050] [2020-10-26 19:39:26,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:39:26,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:26,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:39:26,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:39:26,151 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 29 states. [2020-10-26 19:39:28,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:28,799 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-10-26 19:39:28,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:39:28,800 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 58 [2020-10-26 19:39:28,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:28,801 INFO L225 Difference]: With dead ends: 72 [2020-10-26 19:39:28,801 INFO L226 Difference]: Without dead ends: 65 [2020-10-26 19:39:28,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=208, Invalid=1514, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:39:28,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-26 19:39:28,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2020-10-26 19:39:28,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-26 19:39:28,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-10-26 19:39:28,815 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 58 [2020-10-26 19:39:28,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:28,816 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-10-26 19:39:28,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:39:28,816 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-10-26 19:39:28,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-26 19:39:28,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:28,817 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:28,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:39:28,817 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:28,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:28,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1275728196, now seen corresponding path program 18 times [2020-10-26 19:39:28,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:28,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835471055] [2020-10-26 19:39:28,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:28,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:28,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:28,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:29,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:29,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:29,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:29,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:30,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:30,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:30,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:31,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:31,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:33,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:33,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 19:39:33,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-26 19:39:33,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 19:39:33,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:33,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:39:33,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:39:33,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-26 19:39:33,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:34,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:34,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:34,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:34,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:34,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:34,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:34,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:39:34,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:34,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:34,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:34,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:34,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:34,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:34,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:34,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:34,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:34,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:34,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:34,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:39:34,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:34,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:39:34,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:34,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:39:34,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:34,545 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 14 proven. 105 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:39:34,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835471055] [2020-10-26 19:39:34,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:34,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:39:34,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044276340] [2020-10-26 19:39:34,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:39:34,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:34,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:39:34,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:39:34,548 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 25 states. [2020-10-26 19:39:36,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:36,431 INFO L93 Difference]: Finished difference Result 103 states and 109 transitions. [2020-10-26 19:39:36,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:39:36,435 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 61 [2020-10-26 19:39:36,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:36,436 INFO L225 Difference]: With dead ends: 103 [2020-10-26 19:39:36,436 INFO L226 Difference]: Without dead ends: 72 [2020-10-26 19:39:36,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=599, Invalid=2263, Unknown=0, NotChecked=0, Total=2862 [2020-10-26 19:39:36,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-26 19:39:36,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2020-10-26 19:39:36,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-26 19:39:36,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2020-10-26 19:39:36,451 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 61 [2020-10-26 19:39:36,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:36,451 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2020-10-26 19:39:36,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:39:36,451 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2020-10-26 19:39:36,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-26 19:39:36,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:36,452 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:36,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:39:36,452 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:36,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:36,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1530186841, now seen corresponding path program 19 times [2020-10-26 19:39:36,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:36,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456853455] [2020-10-26 19:39:36,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:36,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:36,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:36,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:37,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:37,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:38,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:38,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:39,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:39,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:40,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:41,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:41,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 19:39:41,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 19:39:41,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-26 19:39:41,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:41,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:39:41,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:39:41,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:39:41,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:42,899 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-26 19:39:43,085 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2020-10-26 19:39:43,289 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-10-26 19:39:43,458 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-10-26 19:39:43,653 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-10-26 19:39:43,850 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2020-10-26 19:39:44,042 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-10-26 19:39:44,212 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2020-10-26 19:39:44,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:44,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:44,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:44,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:44,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:44,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:44,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:39:44,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:44,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:44,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:44,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:44,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:44,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:44,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:44,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:44,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:44,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:44,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:44,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:39:44,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:44,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:39:44,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:44,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:39:44,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:44,985 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 20 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:39:44,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456853455] [2020-10-26 19:39:44,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:44,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:39:44,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889860891] [2020-10-26 19:39:44,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:39:44,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:44,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:39:44,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1173, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:39:44,987 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 37 states. [2020-10-26 19:39:47,047 WARN L193 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 96 [2020-10-26 19:39:47,695 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-10-26 19:39:48,071 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 95 [2020-10-26 19:39:48,495 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 99 [2020-10-26 19:39:49,068 WARN L193 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 99 [2020-10-26 19:39:49,398 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 86 [2020-10-26 19:39:49,736 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 88 [2020-10-26 19:39:50,163 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 91 [2020-10-26 19:39:50,484 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 93 [2020-10-26 19:39:50,804 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 96 [2020-10-26 19:39:51,138 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 86 [2020-10-26 19:39:51,417 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 89 [2020-10-26 19:39:51,727 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 89 [2020-10-26 19:39:52,203 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 90 [2020-10-26 19:39:52,544 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2020-10-26 19:39:52,873 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 89 [2020-10-26 19:39:53,413 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 92 [2020-10-26 19:39:53,779 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 95 [2020-10-26 19:39:54,305 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 95 [2020-10-26 19:39:54,850 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 91 [2020-10-26 19:39:55,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:55,153 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2020-10-26 19:39:55,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-26 19:39:55,154 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 64 [2020-10-26 19:39:55,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:55,155 INFO L225 Difference]: With dead ends: 110 [2020-10-26 19:39:55,155 INFO L226 Difference]: Without dead ends: 80 [2020-10-26 19:39:55,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1768 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=792, Invalid=5214, Unknown=0, NotChecked=0, Total=6006 [2020-10-26 19:39:55,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-26 19:39:55,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2020-10-26 19:39:55,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-26 19:39:55,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2020-10-26 19:39:55,172 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 64 [2020-10-26 19:39:55,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:55,172 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2020-10-26 19:39:55,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:39:55,172 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2020-10-26 19:39:55,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 19:39:55,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:55,173 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:55,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:39:55,174 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:55,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:55,174 INFO L82 PathProgramCache]: Analyzing trace with hash -403427940, now seen corresponding path program 20 times [2020-10-26 19:39:55,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:55,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560981269] [2020-10-26 19:39:55,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:55,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:55,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:55,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:55,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:55,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:55,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:56,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:56,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:56,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:56,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:57,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:57,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:57,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:57,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:57,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:57,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:57,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:57,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:58,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:58,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:58,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:59,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:59,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:59,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:00,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:00,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:40:00,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-26 19:40:00,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-26 19:40:00,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:00,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:40:00,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:40:00,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-26 19:40:00,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:01,509 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2020-10-26 19:40:01,680 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-10-26 19:40:01,855 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-10-26 19:40:02,271 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-10-26 19:40:02,729 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-10-26 19:40:03,084 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2020-10-26 19:40:04,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:40:04,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:04,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:04,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:04,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:40:04,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:04,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:40:04,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:04,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:04,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:04,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:04,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:04,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:40:04,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:04,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:04,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:04,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:40:04,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:04,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:40:04,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:04,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:04,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:04,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:04,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:04,467 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 12 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:40:04,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560981269] [2020-10-26 19:40:04,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:40:04,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:40:04,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988757742] [2020-10-26 19:40:04,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:40:04,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:40:04,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:40:04,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1266, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:40:04,469 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand 38 states. [2020-10-26 19:40:05,607 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-26 19:40:05,838 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2020-10-26 19:40:06,118 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-10-26 19:40:06,368 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2020-10-26 19:40:07,744 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-10-26 19:40:08,090 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2020-10-26 19:40:08,304 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2020-10-26 19:40:08,567 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-26 19:40:09,047 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 80 [2020-10-26 19:40:09,293 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 40 [2020-10-26 19:40:09,513 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-10-26 19:40:10,099 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2020-10-26 19:40:10,620 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 85 [2020-10-26 19:40:10,782 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2020-10-26 19:40:11,260 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2020-10-26 19:40:11,663 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 78 [2020-10-26 19:40:11,959 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2020-10-26 19:40:12,448 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2020-10-26 19:40:12,661 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2020-10-26 19:40:12,977 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 45 [2020-10-26 19:40:13,365 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 63 [2020-10-26 19:40:13,696 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 55 [2020-10-26 19:40:14,112 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 52 [2020-10-26 19:40:14,400 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 54 [2020-10-26 19:40:14,776 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 52 [2020-10-26 19:40:15,151 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2020-10-26 19:40:15,419 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-10-26 19:40:15,652 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2020-10-26 19:40:15,894 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-26 19:40:16,315 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 70 [2020-10-26 19:40:16,522 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2020-10-26 19:40:16,963 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 73 [2020-10-26 19:40:17,292 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2020-10-26 19:40:17,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:40:17,585 INFO L93 Difference]: Finished difference Result 147 states and 167 transitions. [2020-10-26 19:40:17,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-26 19:40:17,587 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 67 [2020-10-26 19:40:17,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:40:17,588 INFO L225 Difference]: With dead ends: 147 [2020-10-26 19:40:17,588 INFO L226 Difference]: Without dead ends: 140 [2020-10-26 19:40:17,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1585 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=741, Invalid=5901, Unknown=0, NotChecked=0, Total=6642 [2020-10-26 19:40:17,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-26 19:40:17,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 107. [2020-10-26 19:40:17,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-26 19:40:17,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 126 transitions. [2020-10-26 19:40:17,611 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 126 transitions. Word has length 67 [2020-10-26 19:40:17,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:40:17,611 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 126 transitions. [2020-10-26 19:40:17,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:40:17,611 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 126 transitions. [2020-10-26 19:40:17,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-26 19:40:17,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:17,612 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 7, 6, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:40:17,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:40:17,612 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:17,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:17,613 INFO L82 PathProgramCache]: Analyzing trace with hash 409364539, now seen corresponding path program 21 times [2020-10-26 19:40:17,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:17,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696429666] [2020-10-26 19:40:17,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:17,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:17,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:17,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:17,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:17,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:17,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:17,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:17,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:18,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:18,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:20,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:22,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:22,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-26 19:40:22,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:40:22,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:40:22,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:22,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:40:22,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:40:22,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:40:22,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:23,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:40:23,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:23,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:23,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:23,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:40:23,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:23,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:40:23,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:23,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:23,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:23,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:23,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:23,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:40:23,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:23,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:23,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:23,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:40:23,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:23,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:40:23,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:23,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:23,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:23,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:23,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:23,080 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 92 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:40:23,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696429666] [2020-10-26 19:40:23,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:40:23,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:40:23,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826745044] [2020-10-26 19:40:23,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:40:23,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:40:23,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:40:23,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:40:23,083 INFO L87 Difference]: Start difference. First operand 107 states and 126 transitions. Second operand 21 states. [2020-10-26 19:40:24,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:40:24,701 INFO L93 Difference]: Finished difference Result 173 states and 193 transitions. [2020-10-26 19:40:24,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:40:24,702 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 70 [2020-10-26 19:40:24,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:40:24,704 INFO L225 Difference]: With dead ends: 173 [2020-10-26 19:40:24,704 INFO L226 Difference]: Without dead ends: 166 [2020-10-26 19:40:24,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=215, Invalid=715, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:40:24,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-26 19:40:24,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 78. [2020-10-26 19:40:24,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-26 19:40:24,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2020-10-26 19:40:24,725 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 70 [2020-10-26 19:40:24,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:40:24,725 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2020-10-26 19:40:24,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:40:24,725 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2020-10-26 19:40:24,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-26 19:40:24,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:24,726 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:40:24,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:40:24,726 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:24,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:24,726 INFO L82 PathProgramCache]: Analyzing trace with hash -102258762, now seen corresponding path program 22 times [2020-10-26 19:40:24,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:24,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812577977] [2020-10-26 19:40:24,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:24,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:24,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:25,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:26,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:26,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:26,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:27,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:27,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:29,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:29,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:29,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-26 19:40:29,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:40:29,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:40:29,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:29,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:40:29,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:40:29,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-26 19:40:29,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:30,197 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 28 [2020-10-26 19:40:30,331 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 29 [2020-10-26 19:40:30,718 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 36 [2020-10-26 19:40:30,861 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 37 [2020-10-26 19:40:30,995 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2020-10-26 19:40:31,284 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2020-10-26 19:40:31,438 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2020-10-26 19:40:31,594 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2020-10-26 19:40:31,879 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2020-10-26 19:40:32,075 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2020-10-26 19:40:32,283 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47