/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-lopstr16/partial_lesser_bound-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 04:03:11,134 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 04:03:11,137 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 04:03:11,193 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 04:03:11,194 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 04:03:11,201 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 04:03:11,205 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 04:03:11,208 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 04:03:11,210 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 04:03:11,211 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 04:03:11,213 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 04:03:11,214 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 04:03:11,215 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 04:03:11,216 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 04:03:11,217 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 04:03:11,219 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 04:03:11,220 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 04:03:11,221 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 04:03:11,223 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 04:03:11,225 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 04:03:11,227 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 04:03:11,232 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 04:03:11,233 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 04:03:11,234 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 04:03:11,238 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 04:03:11,238 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 04:03:11,238 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 04:03:11,240 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 04:03:11,240 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 04:03:11,241 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 04:03:11,242 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 04:03:11,243 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 04:03:11,244 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 04:03:11,245 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 04:03:11,246 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 04:03:11,247 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 04:03:11,248 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 04:03:11,248 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 04:03:11,249 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 04:03:11,250 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 04:03:11,251 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 04:03:11,252 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 04:03:11,282 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 04:03:11,282 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 04:03:11,284 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 04:03:11,284 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 04:03:11,284 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 04:03:11,284 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 04:03:11,285 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 04:03:11,285 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 04:03:11,285 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 04:03:11,285 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 04:03:11,285 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 04:03:11,286 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 04:03:11,286 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 04:03:11,286 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 04:03:11,286 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 04:03:11,286 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 04:03:11,287 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 04:03:11,287 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 04:03:11,287 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 04:03:11,287 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 04:03:11,287 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 04:03:11,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 04:03:11,288 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 04:03:11,288 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 04:03:11,288 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 04:03:11,289 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 04:03:11,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 04:03:11,289 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 04:03:11,289 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 04:03:11,289 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 04:03:11,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 04:03:11,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 04:03:11,760 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 04:03:11,761 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 04:03:11,762 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 04:03:11,763 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/partial_lesser_bound-1.i [2020-10-29 04:03:11,843 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1cc3fce2a/b836a0ddb4594f968e1df0b3bcfc2075/FLAG07e1ec99f [2020-10-29 04:03:12,523 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 04:03:12,524 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-lopstr16/partial_lesser_bound-1.i [2020-10-29 04:03:12,533 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1cc3fce2a/b836a0ddb4594f968e1df0b3bcfc2075/FLAG07e1ec99f [2020-10-29 04:03:12,845 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1cc3fce2a/b836a0ddb4594f968e1df0b3bcfc2075 [2020-10-29 04:03:12,849 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 04:03:12,856 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 04:03:12,859 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 04:03:12,860 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 04:03:12,864 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 04:03:12,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 04:03:12" (1/1) ... [2020-10-29 04:03:12,872 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@99320ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:03:12, skipping insertion in model container [2020-10-29 04:03:12,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 04:03:12" (1/1) ... [2020-10-29 04:03:12,881 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 04:03:12,903 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 04:03:13,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 04:03:13,107 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 04:03:13,128 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 04:03:13,148 INFO L208 MainTranslator]: Completed translation [2020-10-29 04:03:13,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:03:13 WrapperNode [2020-10-29 04:03:13,149 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 04:03:13,150 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 04:03:13,150 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 04:03:13,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 04:03:13,164 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:03:13" (1/1) ... [2020-10-29 04:03:13,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:03:13" (1/1) ... [2020-10-29 04:03:13,173 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:03:13" (1/1) ... [2020-10-29 04:03:13,174 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:03:13" (1/1) ... [2020-10-29 04:03:13,181 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:03:13" (1/1) ... [2020-10-29 04:03:13,187 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:03:13" (1/1) ... [2020-10-29 04:03:13,189 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:03:13" (1/1) ... [2020-10-29 04:03:13,191 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 04:03:13,192 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 04:03:13,193 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 04:03:13,193 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 04:03:13,194 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:03:13" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 04:03:13,268 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 04:03:13,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 04:03:13,269 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 04:03:13,269 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 04:03:13,269 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 04:03:13,269 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 04:03:13,270 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 04:03:13,270 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 04:03:13,270 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 04:03:13,270 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 04:03:13,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 04:03:13,271 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 04:03:13,271 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 04:03:13,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 04:03:13,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 04:03:13,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 04:03:13,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 04:03:13,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 04:03:13,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 04:03:13,754 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 04:03:13,754 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-29 04:03:13,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 04:03:13 BoogieIcfgContainer [2020-10-29 04:03:13,757 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 04:03:13,762 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 04:03:13,763 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 04:03:13,766 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 04:03:13,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 04:03:12" (1/3) ... [2020-10-29 04:03:13,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ce6a24f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 04:03:13, skipping insertion in model container [2020-10-29 04:03:13,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:03:13" (2/3) ... [2020-10-29 04:03:13,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ce6a24f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 04:03:13, skipping insertion in model container [2020-10-29 04:03:13,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 04:03:13" (3/3) ... [2020-10-29 04:03:13,771 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_lesser_bound-1.i [2020-10-29 04:03:13,785 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 04:03:13,790 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 04:03:13,806 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 04:03:13,856 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 04:03:13,857 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 04:03:13,857 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 04:03:13,857 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 04:03:13,857 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 04:03:13,857 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 04:03:13,858 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 04:03:13,858 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 04:03:13,878 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-29 04:03:13,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-29 04:03:13,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:03:13,887 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:03:13,887 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:03:13,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:03:13,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1906025394, now seen corresponding path program 1 times [2020-10-29 04:03:13,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:03:13,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68354430] [2020-10-29 04:03:13,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:03:14,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:03:14,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:14,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:14,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:03:14,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 04:03:14,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 04:03:14,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 219 [2020-10-29 04:03:14,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:03:14,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:03:14,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:03:14,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 04:03:14,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:03:14,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 04:03:14,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:03:14,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:03:14,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:14,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:03:14,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:03:14,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:03:14,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 04:03:14,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:03:14,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:03:14,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:03:14,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:03:14,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:03:14,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 04:03:14,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:03:14,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68354430] [2020-10-29 04:03:14,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 04:03:14,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 04:03:14,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863880620] [2020-10-29 04:03:14,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-29 04:03:14,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:03:14,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-29 04:03:14,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-29 04:03:14,460 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-10-29 04:03:14,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:03:14,555 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-10-29 04:03:14,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-29 04:03:14,557 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-29 04:03:14,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:03:14,565 INFO L225 Difference]: With dead ends: 53 [2020-10-29 04:03:14,565 INFO L226 Difference]: Without dead ends: 24 [2020-10-29 04:03:14,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-29 04:03:14,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-29 04:03:14,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-29 04:03:14,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-29 04:03:14,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-29 04:03:14,614 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2020-10-29 04:03:14,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:03:14,615 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-29 04:03:14,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-29 04:03:14,615 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-29 04:03:14,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-29 04:03:14,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:03:14,616 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:03:14,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 04:03:14,617 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:03:14,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:03:14,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1754426942, now seen corresponding path program 1 times [2020-10-29 04:03:14,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:03:14,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119789003] [2020-10-29 04:03:14,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:03:14,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:03:14,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:14,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:14,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:03:14,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 04:03:14,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 04:03:14,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 228 [2020-10-29 04:03:14,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:03:14,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:03:14,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:03:14,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 04:03:14,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:03:14,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:03:14,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:03:14,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:03:14,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:14,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:03:14,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:03:14,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:03:14,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 04:03:14,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:03:14,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:03:14,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:03:14,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:03:14,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:03:14,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 04:03:14,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:03:14,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119789003] [2020-10-29 04:03:14,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 04:03:14,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 04:03:14,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127839001] [2020-10-29 04:03:14,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 04:03:14,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:03:14,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 04:03:14,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 04:03:14,947 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 4 states. [2020-10-29 04:03:15,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:03:15,100 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2020-10-29 04:03:15,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 04:03:15,100 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-29 04:03:15,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:03:15,102 INFO L225 Difference]: With dead ends: 56 [2020-10-29 04:03:15,102 INFO L226 Difference]: Without dead ends: 40 [2020-10-29 04:03:15,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 04:03:15,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-29 04:03:15,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 26. [2020-10-29 04:03:15,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-29 04:03:15,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-29 04:03:15,113 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 17 [2020-10-29 04:03:15,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:03:15,113 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-29 04:03:15,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 04:03:15,114 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-29 04:03:15,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 04:03:15,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:03:15,115 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] [2020-10-29 04:03:15,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 04:03:15,115 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:03:15,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:03:15,116 INFO L82 PathProgramCache]: Analyzing trace with hash -999640386, now seen corresponding path program 1 times [2020-10-29 04:03:15,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:03:15,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833131873] [2020-10-29 04:03:15,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:03:15,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:03:15,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:15,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:15,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:16,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:03:16,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 04:03:16,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 04:03:16,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1085 [2020-10-29 04:03:16,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:03:16,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:03:16,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 04:03:16,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 04:03:16,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 04:03:16,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:03:16,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:03:16,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:03:16,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:16,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:03:16,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:03:16,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:03:16,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 04:03:16,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:03:16,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:03:16,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:03:16,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:03:16,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:03:16,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 04:03:16,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 04:03:16,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833131873] [2020-10-29 04:03:16,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:03:16,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 04:03:16,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223189666] [2020-10-29 04:03:16,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 04:03:16,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:03:16,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 04:03:16,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 04:03:16,368 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 9 states. [2020-10-29 04:03:16,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:03:16,851 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-10-29 04:03:16,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 04:03:16,852 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-10-29 04:03:16,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:03:16,853 INFO L225 Difference]: With dead ends: 40 [2020-10-29 04:03:16,853 INFO L226 Difference]: Without dead ends: 36 [2020-10-29 04:03:16,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-29 04:03:16,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-29 04:03:16,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2020-10-29 04:03:16,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-29 04:03:16,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-29 04:03:16,864 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 21 [2020-10-29 04:03:16,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:03:16,865 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-29 04:03:16,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 04:03:16,865 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-29 04:03:16,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 04:03:16,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:03:16,866 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 04:03:16,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 04:03:16,867 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:03:16,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:03:16,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1350306584, now seen corresponding path program 1 times [2020-10-29 04:03:16,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:03:16,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562115526] [2020-10-29 04:03:16,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:03:16,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:03:16,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:16,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:16,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:16,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:17,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:18,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:03:18,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 04:03:18,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 04:03:18,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1466 [2020-10-29 04:03:18,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:03:18,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:03:18,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 04:03:18,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:03:18,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 04:03:18,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:03:18,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:03:18,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:03:18,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:18,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:03:18,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:03:18,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:03:18,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 04:03:18,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:03:18,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:03:18,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:03:18,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:03:18,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:03:18,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 04:03:18,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-29 04:03:18,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:03:18,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:18,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:03:18,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 04:03:18,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:03:18,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 04:03:18,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:03:18,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:03:18,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 04:03:18,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 04:03:18,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 04:03:18,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:03:18,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 04:03:18,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562115526] [2020-10-29 04:03:18,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:03:18,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 04:03:18,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424715232] [2020-10-29 04:03:18,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 04:03:18,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:03:18,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 04:03:18,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-29 04:03:18,812 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 11 states. [2020-10-29 04:03:19,182 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-29 04:03:19,468 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-10-29 04:03:19,797 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-29 04:03:20,146 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-10-29 04:03:20,554 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2020-10-29 04:03:20,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:03:20,803 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2020-10-29 04:03:20,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 04:03:20,804 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-29 04:03:20,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:03:20,807 INFO L225 Difference]: With dead ends: 53 [2020-10-29 04:03:20,807 INFO L226 Difference]: Without dead ends: 34 [2020-10-29 04:03:20,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2020-10-29 04:03:20,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-29 04:03:20,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-29 04:03:20,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-29 04:03:20,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-29 04:03:20,817 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2020-10-29 04:03:20,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:03:20,817 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-29 04:03:20,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 04:03:20,817 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-29 04:03:20,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 04:03:20,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:03:20,819 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:03:20,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 04:03:20,819 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:03:20,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:03:20,820 INFO L82 PathProgramCache]: Analyzing trace with hash 507031094, now seen corresponding path program 2 times [2020-10-29 04:03:20,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:03:20,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698531638] [2020-10-29 04:03:20,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:03:20,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:03:20,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:20,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:20,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:21,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:21,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:21,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:23,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:03:23,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 04:03:23,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 04:03:23,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3148 [2020-10-29 04:03:23,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:03:23,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:03:23,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 04:03:23,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:03:23,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 04:03:23,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:03:24,411 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-10-29 04:03:24,602 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-10-29 04:03:25,239 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 75 [2020-10-29 04:03:25,776 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2020-10-29 04:03:26,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:03:26,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:03:26,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:26,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:03:26,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:03:26,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:03:26,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 04:03:26,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:03:26,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:03:26,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:03:26,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:03:26,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:03:26,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:03:26,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-29 04:03:26,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:03:26,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:26,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:03:26,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 04:03:26,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:03:26,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 04:03:26,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:03:26,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:03:26,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 04:03:26,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:03:26,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 04:03:26,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:03:26,309 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 04:03:26,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698531638] [2020-10-29 04:03:26,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:03:26,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 04:03:26,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316652587] [2020-10-29 04:03:26,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 04:03:26,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:03:26,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 04:03:26,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-29 04:03:26,312 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 16 states. [2020-10-29 04:03:27,834 WARN L193 SmtUtils]: Spent 951.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 98 [2020-10-29 04:03:29,030 WARN L193 SmtUtils]: Spent 803.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 91 [2020-10-29 04:03:30,242 WARN L193 SmtUtils]: Spent 908.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 102 [2020-10-29 04:03:31,427 WARN L193 SmtUtils]: Spent 894.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 122 [2020-10-29 04:03:32,633 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 127 DAG size of output: 125 [2020-10-29 04:03:33,842 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 131 DAG size of output: 127 [2020-10-29 04:03:35,110 WARN L193 SmtUtils]: Spent 852.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 100 [2020-10-29 04:03:36,412 WARN L193 SmtUtils]: Spent 977.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 98 [2020-10-29 04:03:37,064 WARN L193 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2020-10-29 04:03:39,971 WARN L193 SmtUtils]: Spent 2.54 s on a formula simplification. DAG size of input: 114 DAG size of output: 96 [2020-10-29 04:03:43,468 WARN L193 SmtUtils]: Spent 3.07 s on a formula simplification. DAG size of input: 147 DAG size of output: 129 [2020-10-29 04:03:47,599 WARN L193 SmtUtils]: Spent 3.74 s on a formula simplification. DAG size of input: 151 DAG size of output: 131 [2020-10-29 04:03:51,490 WARN L193 SmtUtils]: Spent 2.83 s on a formula simplification. DAG size of input: 112 DAG size of output: 94 [2020-10-29 04:03:51,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:03:51,895 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2020-10-29 04:03:51,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 04:03:51,901 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2020-10-29 04:03:51,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:03:51,902 INFO L225 Difference]: With dead ends: 58 [2020-10-29 04:03:51,902 INFO L226 Difference]: Without dead ends: 36 [2020-10-29 04:03:51,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 24.6s TimeCoverageRelationStatistics Valid=238, Invalid=952, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 04:03:51,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-29 04:03:51,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-29 04:03:51,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-29 04:03:51,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-29 04:03:51,916 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2020-10-29 04:03:51,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:03:51,917 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-29 04:03:51,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 04:03:51,917 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-29 04:03:51,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 04:03:51,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:03:51,919 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] [2020-10-29 04:03:51,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 04:03:51,919 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:03:51,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:03:51,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1868104148, now seen corresponding path program 3 times [2020-10-29 04:03:51,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:03:51,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322456049] [2020-10-29 04:03:51,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:03:51,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:03:51,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:51,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:51,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:52,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:52,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:53,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:56,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:03:56,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 04:03:56,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 04:03:56,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4267 [2020-10-29 04:03:56,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:03:56,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:03:56,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 04:03:56,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 04:03:56,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 04:03:56,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:03:56,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:03:56,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:03:56,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:56,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:03:56,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:03:56,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:03:56,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 04:03:56,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:03:56,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:03:56,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:03:56,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:03:56,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:03:56,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:03:56,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-29 04:03:56,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:03:56,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:56,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:03:56,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 04:03:56,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:03:56,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 04:03:56,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:03:56,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:03:56,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:03:56,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:03:56,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 04:03:56,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:03:56,463 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 04:03:56,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322456049] [2020-10-29 04:03:56,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:03:56,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 04:03:56,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939637443] [2020-10-29 04:03:56,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 04:03:56,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:03:56,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 04:03:56,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-29 04:03:56,469 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 11 states. [2020-10-29 04:03:57,087 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-10-29 04:03:57,302 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-29 04:03:57,440 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-10-29 04:03:57,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:03:57,660 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2020-10-29 04:03:57,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 04:03:57,661 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-29 04:03:57,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:03:57,662 INFO L225 Difference]: With dead ends: 76 [2020-10-29 04:03:57,662 INFO L226 Difference]: Without dead ends: 49 [2020-10-29 04:03:57,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-10-29 04:03:57,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-29 04:03:57,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-10-29 04:03:57,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-29 04:03:57,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-29 04:03:57,673 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 33 [2020-10-29 04:03:57,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:03:57,673 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-29 04:03:57,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 04:03:57,674 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-29 04:03:57,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 04:03:57,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:03:57,675 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:03:57,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 04:03:57,676 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:03:57,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:03:57,676 INFO L82 PathProgramCache]: Analyzing trace with hash 664533644, now seen corresponding path program 4 times [2020-10-29 04:03:57,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:03:57,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700269061] [2020-10-29 04:03:57,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:03:57,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:03:57,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:57,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:57,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:57,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:57,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:58,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:59,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:59,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:03:59,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:00,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:00,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:02,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:02,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:04:02,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 04:04:02,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 04:04:02,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-29 04:04:02,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:04:02,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:04:02,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 04:04:02,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 04:04:02,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 04:04:02,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:04:02,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:04:02,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:04:02,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:02,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:04:02,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:04:02,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:04:02,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 04:04:02,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:04:02,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:04:02,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:04:02,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:04:02,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:04:02,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:04:02,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-29 04:04:02,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:04:02,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:02,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:04:02,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 04:04:02,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:04:02,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 04:04:02,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:04:02,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:04:02,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:04:02,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:04:02,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 04:04:02,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:04:02,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-29 04:04:02,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:04:02,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:02,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:04:02,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 04:04:02,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:04:02,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 04:04:02,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:04:02,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:04:02,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:04:02,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:04:02,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 04:04:02,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:04:02,978 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-29 04:04:02,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700269061] [2020-10-29 04:04:02,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:04:02,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 04:04:02,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082837005] [2020-10-29 04:04:02,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 04:04:02,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:04:02,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 04:04:02,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-29 04:04:02,987 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 13 states. [2020-10-29 04:04:03,798 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-10-29 04:04:04,146 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-10-29 04:04:04,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:04:04,336 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2020-10-29 04:04:04,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 04:04:04,337 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2020-10-29 04:04:04,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:04:04,338 INFO L225 Difference]: With dead ends: 95 [2020-10-29 04:04:04,338 INFO L226 Difference]: Without dead ends: 60 [2020-10-29 04:04:04,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2020-10-29 04:04:04,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-29 04:04:04,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2020-10-29 04:04:04,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-29 04:04:04,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-29 04:04:04,352 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 43 [2020-10-29 04:04:04,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:04:04,352 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-29 04:04:04,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 04:04:04,352 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-29 04:04:04,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 04:04:04,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:04:04,354 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:04:04,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 04:04:04,354 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:04:04,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:04:04,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1490231868, now seen corresponding path program 5 times [2020-10-29 04:04:04,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:04:04,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142666475] [2020-10-29 04:04:04,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:04:04,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:04:04,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:04,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:04,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:04,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:04,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:04,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:05,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:05,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:06,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:06,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:07,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:07,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:08,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:09,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:09,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:04:09,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-29 04:04:09,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 04:04:09,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 04:04:09,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:04:09,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:04:09,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 04:04:09,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 04:04:09,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 04:04:09,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:04:09,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:04:09,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:04:09,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:09,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:04:09,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:04:09,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:04:09,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 04:04:09,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:04:09,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:04:09,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:04:09,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:04:09,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:04:09,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:04:09,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-29 04:04:09,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:04:09,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:09,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:04:09,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 04:04:09,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:04:09,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 04:04:09,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:04:09,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:04:09,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:04:09,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:04:09,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 04:04:09,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:04:09,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-29 04:04:09,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:04:09,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:09,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:04:09,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 04:04:09,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:04:09,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 04:04:09,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:04:09,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:04:09,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:04:09,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:04:09,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 04:04:09,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:04:09,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-29 04:04:09,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:04:09,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:09,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:04:09,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 04:04:09,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:04:09,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 04:04:09,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:04:09,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:04:09,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 04:04:09,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 04:04:09,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 04:04:09,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:04:09,851 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 04:04:09,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142666475] [2020-10-29 04:04:09,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:04:09,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 04:04:09,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902569062] [2020-10-29 04:04:09,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 04:04:09,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:04:09,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 04:04:09,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-29 04:04:09,855 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 17 states. [2020-10-29 04:04:10,082 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-10-29 04:04:10,872 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2020-10-29 04:04:11,020 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-10-29 04:04:11,532 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-10-29 04:04:11,668 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2020-10-29 04:04:12,396 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-10-29 04:04:13,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:04:13,537 INFO L93 Difference]: Finished difference Result 125 states and 130 transitions. [2020-10-29 04:04:13,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-29 04:04:13,538 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 53 [2020-10-29 04:04:13,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:04:13,542 INFO L225 Difference]: With dead ends: 125 [2020-10-29 04:04:13,542 INFO L226 Difference]: Without dead ends: 90 [2020-10-29 04:04:13,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=518, Invalid=2134, Unknown=0, NotChecked=0, Total=2652 [2020-10-29 04:04:13,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-29 04:04:13,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-10-29 04:04:13,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-29 04:04:13,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-10-29 04:04:13,557 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 53 [2020-10-29 04:04:13,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:04:13,557 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-10-29 04:04:13,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 04:04:13,558 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-10-29 04:04:13,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 04:04:13,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:04:13,559 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:04:13,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 04:04:13,559 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:04:13,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:04:13,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1482416000, now seen corresponding path program 6 times [2020-10-29 04:04:13,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:04:13,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341730007] [2020-10-29 04:04:13,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:04:13,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:04:13,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:13,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:13,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:13,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:14,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:15,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:15,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:15,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:16,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:16,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:16,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:17,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:17,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:17,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:18,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:18,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:18,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:04:18,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 04:04:18,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-29 04:04:18,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 04:04:18,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:04:18,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:04:18,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-29 04:04:18,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:04:18,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 04:04:18,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0