/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_copy4_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:18:44,149 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:18:44,157 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:18:44,215 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:18:44,217 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:18:44,225 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:18:44,227 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:18:44,232 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:18:44,235 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:18:44,242 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:18:44,244 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:18:44,246 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:18:44,246 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:18:44,251 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:18:44,253 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:18:44,256 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:18:44,257 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:18:44,261 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:18:44,270 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:18:44,280 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:18:44,282 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:18:44,285 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:18:44,287 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:18:44,289 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:18:44,299 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:18:44,321 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:18:44,321 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:18:44,325 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:18:44,326 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:18:44,327 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:18:44,327 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:18:44,328 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:18:44,330 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:18:44,332 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:18:44,333 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:18:44,333 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:18:44,334 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:18:44,334 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:18:44,335 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:18:44,336 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:18:44,337 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:18:44,348 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 14:18:44,436 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:18:44,437 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:18:44,442 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:18:44,443 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:18:44,443 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:18:44,444 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:18:44,444 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:18:44,444 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:18:44,444 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:18:44,445 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:18:44,446 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:18:44,446 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:18:44,447 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:18:44,447 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:18:44,447 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:18:44,448 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:18:44,448 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:18:44,448 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:18:44,449 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:18:44,449 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:18:44,449 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:18:44,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:18:44,450 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:18:44,450 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:18:44,450 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:18:44,451 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:18:44,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:18:44,451 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:18:44,451 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:18:44,452 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:18:44,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:18:44,976 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:18:44,980 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:18:44,981 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:18:44,982 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:18:44,983 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy4_ground-2.i [2020-10-27 14:18:45,073 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/19cf77444/afa2eb042b6840fea2b63296222ebc97/FLAGc195519b8 [2020-10-27 14:18:45,791 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:18:45,792 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy4_ground-2.i [2020-10-27 14:18:45,803 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/19cf77444/afa2eb042b6840fea2b63296222ebc97/FLAGc195519b8 [2020-10-27 14:18:46,152 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/19cf77444/afa2eb042b6840fea2b63296222ebc97 [2020-10-27 14:18:46,158 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:18:46,166 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:18:46,171 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:18:46,171 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:18:46,176 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:18:46,177 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:18:46" (1/1) ... [2020-10-27 14:18:46,181 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19ecd854 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:46, skipping insertion in model container [2020-10-27 14:18:46,182 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:18:46" (1/1) ... [2020-10-27 14:18:46,191 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:18:46,212 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:18:46,453 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:18:46,462 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:18:46,490 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:18:46,508 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:18:46,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:46 WrapperNode [2020-10-27 14:18:46,509 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:18:46,510 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:18:46,510 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:18:46,511 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:18:46,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:46" (1/1) ... [2020-10-27 14:18:46,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:46" (1/1) ... [2020-10-27 14:18:46,561 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:46" (1/1) ... [2020-10-27 14:18:46,561 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:46" (1/1) ... [2020-10-27 14:18:46,597 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:46" (1/1) ... [2020-10-27 14:18:46,611 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:46" (1/1) ... [2020-10-27 14:18:46,616 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:46" (1/1) ... [2020-10-27 14:18:46,625 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:18:46,626 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:18:46,626 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:18:46,626 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:18:46,627 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:46" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:18:46,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:18:46,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:18:46,714 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:18:46,714 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:18:46,714 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:18:46,714 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:18:46,714 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:18:46,714 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 14:18:46,715 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 14:18:46,715 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:18:46,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:18:46,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:18:46,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:18:46,715 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:18:46,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:18:46,716 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:18:46,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:18:46,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:18:46,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:18:46,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:18:47,302 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:18:47,302 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-27 14:18:47,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:18:47 BoogieIcfgContainer [2020-10-27 14:18:47,306 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:18:47,311 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:18:47,311 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:18:47,315 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:18:47,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:18:46" (1/3) ... [2020-10-27 14:18:47,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f9b07c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:18:47, skipping insertion in model container [2020-10-27 14:18:47,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:46" (2/3) ... [2020-10-27 14:18:47,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f9b07c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:18:47, skipping insertion in model container [2020-10-27 14:18:47,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:18:47" (3/3) ... [2020-10-27 14:18:47,321 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy4_ground-2.i [2020-10-27 14:18:47,339 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:18:47,345 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:18:47,361 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:18:47,408 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:18:47,408 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:18:47,408 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:18:47,409 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:18:47,409 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:18:47,409 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:18:47,409 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:18:47,409 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:18:47,434 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-10-27 14:18:47,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 14:18:47,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:47,446 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:18:47,447 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:47,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:47,456 INFO L82 PathProgramCache]: Analyzing trace with hash 340893040, now seen corresponding path program 1 times [2020-10-27 14:18:47,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:47,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530593147] [2020-10-27 14:18:47,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:47,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:47,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:47,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:47,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:47,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:47,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:48,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:48,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 14:18:48,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:18:48,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 782 [2020-10-27 14:18:48,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:48,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:18:48,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 14:18:48,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 14:18:48,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:18:48,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:18:48,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:48,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:48,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:48,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:18:48,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:48,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 14:18:48,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:48,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:48,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:48,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:48,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:48,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:18:48,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530593147] [2020-10-27 14:18:48,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:18:48,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:18:48,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188082558] [2020-10-27 14:18:48,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:18:48,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:18:48,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:18:48,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:18:48,619 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 4 states. [2020-10-27 14:18:48,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:18:48,802 INFO L93 Difference]: Finished difference Result 79 states and 113 transitions. [2020-10-27 14:18:48,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:18:48,804 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-27 14:18:48,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:18:48,814 INFO L225 Difference]: With dead ends: 79 [2020-10-27 14:18:48,814 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 14:18:48,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:18:48,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 14:18:48,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2020-10-27 14:18:48,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 14:18:48,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-27 14:18:48,864 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 23 [2020-10-27 14:18:48,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:18:48,865 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-27 14:18:48,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:18:48,865 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-27 14:18:48,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 14:18:48,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:48,866 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:18:48,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:18:48,867 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:48,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:48,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1144251094, now seen corresponding path program 1 times [2020-10-27 14:18:48,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:48,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836072922] [2020-10-27 14:18:48,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:48,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:48,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:48,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:48,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:48,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:48,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:51,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:53,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:53,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 14:18:53,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:18:53,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:18:53,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:53,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:18:53,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:18:53,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 14:18:53,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 14:18:53,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:18:53,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:53,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:53,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:53,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:18:53,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:53,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 14:18:53,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:53,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:53,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:53,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:53,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-27 14:18:53,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 14:18:54,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836072922] [2020-10-27 14:18:54,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:18:54,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 14:18:54,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590466068] [2020-10-27 14:18:54,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:18:54,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:18:54,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:18:54,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:18:54,011 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 5 states. [2020-10-27 14:18:54,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:18:54,203 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2020-10-27 14:18:54,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:18:54,203 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-10-27 14:18:54,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:18:54,205 INFO L225 Difference]: With dead ends: 74 [2020-10-27 14:18:54,205 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 14:18:54,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:18:54,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 14:18:54,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-10-27 14:18:54,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 14:18:54,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2020-10-27 14:18:54,218 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 31 [2020-10-27 14:18:54,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:18:54,218 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2020-10-27 14:18:54,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:18:54,219 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2020-10-27 14:18:54,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 14:18:54,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:54,220 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:18:54,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:18:54,221 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:54,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:54,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1893734194, now seen corresponding path program 2 times [2020-10-27 14:18:54,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:54,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492547176] [2020-10-27 14:18:54,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:54,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:54,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:54,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:54,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:54,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:54,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:58,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:59,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:59,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 14:18:59,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:18:59,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:18:59,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:59,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:18:59,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 14:18:59,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:18:59,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:59,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:18:59,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:59,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:59,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:59,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:18:59,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:59,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:18:59,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:59,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:59,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:59,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:59,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:18:59,334 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-27 14:18:59,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492547176] [2020-10-27 14:18:59,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:18:59,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:18:59,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950898377] [2020-10-27 14:18:59,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:18:59,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:18:59,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:18:59,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:18:59,342 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 6 states. [2020-10-27 14:18:59,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:18:59,552 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2020-10-27 14:18:59,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:18:59,553 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-10-27 14:18:59,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:18:59,554 INFO L225 Difference]: With dead ends: 88 [2020-10-27 14:18:59,554 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 14:18:59,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:18:59,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 14:18:59,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2020-10-27 14:18:59,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 14:18:59,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2020-10-27 14:18:59,566 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 39 [2020-10-27 14:18:59,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:18:59,567 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2020-10-27 14:18:59,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:18:59,567 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2020-10-27 14:18:59,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 14:18:59,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:59,569 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:18:59,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:18:59,569 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:59,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:59,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1103877830, now seen corresponding path program 3 times [2020-10-27 14:18:59,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:59,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519234153] [2020-10-27 14:18:59,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:59,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:59,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:59,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:59,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:59,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:00,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:04,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:04,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:19:04,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:19:04,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:19:04,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:04,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:19:04,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-27 14:19:04,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 14:19:04,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 14:19:04,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:04,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:04,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:04,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:04,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:04,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:04,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:19:04,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:04,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:04,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:04,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:04,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:04,692 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-27 14:19:04,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519234153] [2020-10-27 14:19:04,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:04,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:19:04,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211713190] [2020-10-27 14:19:04,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:19:04,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:04,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:19:04,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:19:04,699 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 7 states. [2020-10-27 14:19:04,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:04,940 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2020-10-27 14:19:04,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:19:04,941 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2020-10-27 14:19:04,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:04,942 INFO L225 Difference]: With dead ends: 102 [2020-10-27 14:19:04,942 INFO L226 Difference]: Without dead ends: 65 [2020-10-27 14:19:04,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:19:04,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-27 14:19:04,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2020-10-27 14:19:04,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 14:19:04,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2020-10-27 14:19:04,964 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 47 [2020-10-27 14:19:04,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:04,966 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2020-10-27 14:19:04,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:19:04,967 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2020-10-27 14:19:04,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 14:19:04,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:04,969 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:04,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:19:04,970 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:04,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:04,970 INFO L82 PathProgramCache]: Analyzing trace with hash -920671042, now seen corresponding path program 4 times [2020-10-27 14:19:04,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:04,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289195991] [2020-10-27 14:19:04,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:04,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:04,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:05,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:05,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:05,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:05,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:09,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:09,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 14:19:09,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:19:09,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 14:19:09,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:09,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:19:09,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 14:19:10,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 14:19:10,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:10,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:10,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:10,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:10,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:10,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:10,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:10,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:19:10,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:10,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:10,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:10,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:10,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:10,094 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-27 14:19:10,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289195991] [2020-10-27 14:19:10,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:10,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:19:10,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125835047] [2020-10-27 14:19:10,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:19:10,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:10,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:19:10,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:19:10,097 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand 8 states. [2020-10-27 14:19:10,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:10,309 INFO L93 Difference]: Finished difference Result 116 states and 128 transitions. [2020-10-27 14:19:10,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 14:19:10,309 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-10-27 14:19:10,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:10,311 INFO L225 Difference]: With dead ends: 116 [2020-10-27 14:19:10,311 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 14:19:10,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:19:10,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 14:19:10,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2020-10-27 14:19:10,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 14:19:10,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2020-10-27 14:19:10,321 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 55 [2020-10-27 14:19:10,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:10,322 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2020-10-27 14:19:10,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:19:10,322 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2020-10-27 14:19:10,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 14:19:10,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:10,324 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:10,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:19:10,324 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:10,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:10,325 INFO L82 PathProgramCache]: Analyzing trace with hash 469985974, now seen corresponding path program 5 times [2020-10-27 14:19:10,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:10,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513812275] [2020-10-27 14:19:10,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:10,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:10,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:10,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:10,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:10,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:15,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:15,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 14:19:15,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:19:15,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 14:19:15,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:15,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:19:15,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-27 14:19:15,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:19:15,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:15,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:15,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:15,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:15,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:15,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:15,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:15,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:19:15,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:15,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:15,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:15,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:15,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:15,491 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-27 14:19:15,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513812275] [2020-10-27 14:19:15,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:15,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:19:15,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012151507] [2020-10-27 14:19:15,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:19:15,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:15,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:19:15,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:19:15,497 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand 9 states. [2020-10-27 14:19:15,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:15,722 INFO L93 Difference]: Finished difference Result 130 states and 142 transitions. [2020-10-27 14:19:15,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:19:15,723 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 63 [2020-10-27 14:19:15,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:15,725 INFO L225 Difference]: With dead ends: 130 [2020-10-27 14:19:15,725 INFO L226 Difference]: Without dead ends: 81 [2020-10-27 14:19:15,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:19:15,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-27 14:19:15,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2020-10-27 14:19:15,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 14:19:15,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2020-10-27 14:19:15,735 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 63 [2020-10-27 14:19:15,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:15,736 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2020-10-27 14:19:15,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:19:15,736 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2020-10-27 14:19:15,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 14:19:15,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:15,738 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:15,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:19:15,738 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:15,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:15,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1151397714, now seen corresponding path program 6 times [2020-10-27 14:19:15,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:15,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743473694] [2020-10-27 14:19:15,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:15,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:15,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:15,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:15,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:15,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:20,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:20,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 14:19:20,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:19:20,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 14:19:20,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:20,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:19:20,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 14:19:20,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:19:20,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:20,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:20,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:20,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:20,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:20,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:20,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:20,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:19:20,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:20,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:20,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:20,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:20,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:20,896 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-27 14:19:20,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743473694] [2020-10-27 14:19:20,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:20,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:19:20,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282026982] [2020-10-27 14:19:20,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:19:20,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:20,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:19:20,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:19:20,899 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand 10 states. [2020-10-27 14:19:21,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:21,100 INFO L93 Difference]: Finished difference Result 144 states and 156 transitions. [2020-10-27 14:19:21,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:19:21,102 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 71 [2020-10-27 14:19:21,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:21,104 INFO L225 Difference]: With dead ends: 144 [2020-10-27 14:19:21,104 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 14:19:21,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:19:21,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 14:19:21,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2020-10-27 14:19:21,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-27 14:19:21,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 90 transitions. [2020-10-27 14:19:21,124 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 90 transitions. Word has length 71 [2020-10-27 14:19:21,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:21,124 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 90 transitions. [2020-10-27 14:19:21,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:19:21,124 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 90 transitions. [2020-10-27 14:19:21,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 14:19:21,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:21,129 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:21,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:19:21,129 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:21,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:21,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1306878298, now seen corresponding path program 7 times [2020-10-27 14:19:21,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:21,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880585944] [2020-10-27 14:19:21,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:21,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:21,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:21,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:21,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:21,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:26,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:26,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 14:19:26,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:19:26,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 14:19:26,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:26,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:19:26,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-27 14:19:26,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 14:19:26,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:26,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:26,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:26,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:26,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:26,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:26,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:26,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:19:26,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:26,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:26,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:26,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:26,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:26,306 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-27 14:19:26,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880585944] [2020-10-27 14:19:26,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:26,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:19:26,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715290044] [2020-10-27 14:19:26,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:19:26,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:26,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:19:26,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:19:26,310 INFO L87 Difference]: Start difference. First operand 85 states and 90 transitions. Second operand 11 states. [2020-10-27 14:19:26,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:26,560 INFO L93 Difference]: Finished difference Result 158 states and 170 transitions. [2020-10-27 14:19:26,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:19:26,560 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 79 [2020-10-27 14:19:26,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:26,561 INFO L225 Difference]: With dead ends: 158 [2020-10-27 14:19:26,561 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 14:19:26,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:19:26,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 14:19:26,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2020-10-27 14:19:26,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-27 14:19:26,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 98 transitions. [2020-10-27 14:19:26,584 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 98 transitions. Word has length 79 [2020-10-27 14:19:26,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:26,584 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 98 transitions. [2020-10-27 14:19:26,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:19:26,584 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 98 transitions. [2020-10-27 14:19:26,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 14:19:26,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:26,586 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:26,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:19:26,586 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:26,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:26,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1793190754, now seen corresponding path program 8 times [2020-10-27 14:19:26,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:26,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351194741] [2020-10-27 14:19:26,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:26,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:26,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:26,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:26,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:26,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:31,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:31,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 14:19:31,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:19:31,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-27 14:19:31,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:31,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:19:31,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-27 14:19:31,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:19:31,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:31,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:31,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:31,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:31,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:31,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:31,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:31,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:19:31,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:31,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:31,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:31,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:31,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:31,790 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2020-10-27 14:19:31,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351194741] [2020-10-27 14:19:31,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:31,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:19:31,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011678130] [2020-10-27 14:19:31,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:19:31,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:31,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:19:31,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:19:31,798 INFO L87 Difference]: Start difference. First operand 93 states and 98 transitions. Second operand 12 states. [2020-10-27 14:19:32,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:32,090 INFO L93 Difference]: Finished difference Result 172 states and 184 transitions. [2020-10-27 14:19:32,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:19:32,091 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 87 [2020-10-27 14:19:32,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:32,092 INFO L225 Difference]: With dead ends: 172 [2020-10-27 14:19:32,092 INFO L226 Difference]: Without dead ends: 105 [2020-10-27 14:19:32,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:19:32,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-27 14:19:32,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2020-10-27 14:19:32,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-27 14:19:32,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 106 transitions. [2020-10-27 14:19:32,108 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 106 transitions. Word has length 87 [2020-10-27 14:19:32,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:32,110 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 106 transitions. [2020-10-27 14:19:32,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:19:32,110 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 106 transitions. [2020-10-27 14:19:32,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-27 14:19:32,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:32,115 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:32,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:19:32,120 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:32,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:32,121 INFO L82 PathProgramCache]: Analyzing trace with hash -2091814250, now seen corresponding path program 9 times [2020-10-27 14:19:32,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:32,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087451210] [2020-10-27 14:19:32,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:32,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:32,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:32,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:32,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:32,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:37,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:37,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-27 14:19:37,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:19:37,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-27 14:19:37,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:37,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:19:37,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-27 14:19:37,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:19:37,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:37,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:37,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:37,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:37,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:37,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:37,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:37,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 14:19:37,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:37,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:37,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:37,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:37,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:37,349 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-10-27 14:19:37,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087451210] [2020-10-27 14:19:37,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:37,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:19:37,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952595620] [2020-10-27 14:19:37,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:19:37,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:37,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:19:37,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:19:37,352 INFO L87 Difference]: Start difference. First operand 101 states and 106 transitions. Second operand 13 states. [2020-10-27 14:19:37,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:37,760 INFO L93 Difference]: Finished difference Result 186 states and 198 transitions. [2020-10-27 14:19:37,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:19:37,761 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 95 [2020-10-27 14:19:37,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:37,762 INFO L225 Difference]: With dead ends: 186 [2020-10-27 14:19:37,763 INFO L226 Difference]: Without dead ends: 113 [2020-10-27 14:19:37,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:19:37,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-27 14:19:37,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2020-10-27 14:19:37,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-27 14:19:37,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 114 transitions. [2020-10-27 14:19:37,773 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 114 transitions. Word has length 95 [2020-10-27 14:19:37,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:37,773 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 114 transitions. [2020-10-27 14:19:37,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:19:37,774 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 114 transitions. [2020-10-27 14:19:37,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-27 14:19:37,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:37,775 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:37,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:19:37,775 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:37,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:37,776 INFO L82 PathProgramCache]: Analyzing trace with hash 631027854, now seen corresponding path program 10 times [2020-10-27 14:19:37,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:37,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392743553] [2020-10-27 14:19:37,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:37,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:37,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:37,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:37,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:37,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:42,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:42,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-27 14:19:42,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:19:42,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-27 14:19:42,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:42,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:19:42,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-27 14:19:42,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:19:42,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:43,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:43,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:43,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:43,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:43,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:43,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:43,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:19:43,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:43,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:43,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:43,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:43,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:19:43,036 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-10-27 14:19:43,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392743553] [2020-10-27 14:19:43,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:43,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:19:43,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091510776] [2020-10-27 14:19:43,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:19:43,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:43,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:19:43,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:19:43,038 INFO L87 Difference]: Start difference. First operand 109 states and 114 transitions. Second operand 14 states. [2020-10-27 14:19:43,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:43,336 INFO L93 Difference]: Finished difference Result 200 states and 212 transitions. [2020-10-27 14:19:43,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:19:43,337 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 103 [2020-10-27 14:19:43,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:43,338 INFO L225 Difference]: With dead ends: 200 [2020-10-27 14:19:43,338 INFO L226 Difference]: Without dead ends: 121 [2020-10-27 14:19:43,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:19:43,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-27 14:19:43,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 117. [2020-10-27 14:19:43,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-27 14:19:43,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 122 transitions. [2020-10-27 14:19:43,356 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 122 transitions. Word has length 103 [2020-10-27 14:19:43,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:43,357 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 122 transitions. [2020-10-27 14:19:43,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:19:43,357 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 122 transitions. [2020-10-27 14:19:43,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-27 14:19:43,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:43,358 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:43,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:19:43,359 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:43,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:43,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1360533882, now seen corresponding path program 11 times [2020-10-27 14:19:43,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:43,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228423785] [2020-10-27 14:19:43,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:43,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:43,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:43,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:43,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:43,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:48,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:48,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-27 14:19:48,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:19:48,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-27 14:19:48,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:48,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:19:48,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-27 14:19:48,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 14:19:48,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:48,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:48,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:48,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:48,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:48,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:48,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:48,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:19:48,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:48,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:48,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:48,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:48,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:48,618 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2020-10-27 14:19:48,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228423785] [2020-10-27 14:19:48,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:48,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:19:48,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141709987] [2020-10-27 14:19:48,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:19:48,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:48,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:19:48,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:19:48,620 INFO L87 Difference]: Start difference. First operand 117 states and 122 transitions. Second operand 15 states. [2020-10-27 14:19:49,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:49,030 INFO L93 Difference]: Finished difference Result 214 states and 226 transitions. [2020-10-27 14:19:49,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:19:49,031 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 111 [2020-10-27 14:19:49,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:49,032 INFO L225 Difference]: With dead ends: 214 [2020-10-27 14:19:49,035 INFO L226 Difference]: Without dead ends: 129 [2020-10-27 14:19:49,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:19:49,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-27 14:19:49,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 125. [2020-10-27 14:19:49,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-27 14:19:49,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 130 transitions. [2020-10-27 14:19:49,044 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 130 transitions. Word has length 111 [2020-10-27 14:19:49,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:49,045 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 130 transitions. [2020-10-27 14:19:49,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:19:49,045 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 130 transitions. [2020-10-27 14:19:49,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-27 14:19:49,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:49,049 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:49,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:19:49,050 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:49,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:49,050 INFO L82 PathProgramCache]: Analyzing trace with hash -602211202, now seen corresponding path program 12 times [2020-10-27 14:19:49,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:49,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2920376] [2020-10-27 14:19:49,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:49,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:49,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:49,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:49,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:49,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:54,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:54,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-27 14:19:54,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:19:54,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:19:54,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:54,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:19:54,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-27 14:19:54,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:19:54,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:54,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:54,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:54,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:54,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:54,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:54,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:54,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:19:54,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:54,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:54,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:54,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:54,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:54,288 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2020-10-27 14:19:54,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2920376] [2020-10-27 14:19:54,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:54,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:19:54,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525057471] [2020-10-27 14:19:54,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:19:54,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:54,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:19:54,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:19:54,291 INFO L87 Difference]: Start difference. First operand 125 states and 130 transitions. Second operand 16 states. [2020-10-27 14:19:54,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:54,732 INFO L93 Difference]: Finished difference Result 228 states and 240 transitions. [2020-10-27 14:19:54,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:19:54,732 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 119 [2020-10-27 14:19:54,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:54,734 INFO L225 Difference]: With dead ends: 228 [2020-10-27 14:19:54,734 INFO L226 Difference]: Without dead ends: 137 [2020-10-27 14:19:54,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:19:54,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-27 14:19:54,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 133. [2020-10-27 14:19:54,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-27 14:19:54,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 138 transitions. [2020-10-27 14:19:54,743 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 138 transitions. Word has length 119 [2020-10-27 14:19:54,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:54,743 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 138 transitions. [2020-10-27 14:19:54,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:19:54,743 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 138 transitions. [2020-10-27 14:19:54,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-27 14:19:54,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:54,745 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:54,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:19:54,745 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:54,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:54,746 INFO L82 PathProgramCache]: Analyzing trace with hash -199361930, now seen corresponding path program 13 times [2020-10-27 14:19:54,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:54,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935957769] [2020-10-27 14:19:54,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:54,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:54,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:54,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:54,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:54,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:59,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:59,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-27 14:19:59,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:19:59,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:19:59,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:59,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:19:59,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-27 14:19:59,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 14:19:59,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:59,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:00,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:00,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:00,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:00,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:00,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:00,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:20:00,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:00,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:00,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:00,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:00,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:00,021 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2020-10-27 14:20:00,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935957769] [2020-10-27 14:20:00,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:00,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:20:00,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714235202] [2020-10-27 14:20:00,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:20:00,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:00,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:20:00,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:20:00,025 INFO L87 Difference]: Start difference. First operand 133 states and 138 transitions. Second operand 17 states. [2020-10-27 14:20:00,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:00,505 INFO L93 Difference]: Finished difference Result 242 states and 254 transitions. [2020-10-27 14:20:00,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:20:00,505 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 127 [2020-10-27 14:20:00,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:00,507 INFO L225 Difference]: With dead ends: 242 [2020-10-27 14:20:00,507 INFO L226 Difference]: Without dead ends: 145 [2020-10-27 14:20:00,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:20:00,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-27 14:20:00,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 141. [2020-10-27 14:20:00,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-27 14:20:00,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 146 transitions. [2020-10-27 14:20:00,517 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 146 transitions. Word has length 127 [2020-10-27 14:20:00,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:00,518 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 146 transitions. [2020-10-27 14:20:00,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:20:00,518 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 146 transitions. [2020-10-27 14:20:00,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-27 14:20:00,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:00,519 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:00,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:20:00,520 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:00,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:00,520 INFO L82 PathProgramCache]: Analyzing trace with hash -942088082, now seen corresponding path program 14 times [2020-10-27 14:20:00,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:00,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475678614] [2020-10-27 14:20:00,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:00,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:00,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:00,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:00,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:00,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:05,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:05,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-27 14:20:05,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:20:05,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5142 [2020-10-27 14:20:05,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:05,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:20:05,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-27 14:20:05,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 14:20:05,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:05,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:05,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:05,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:05,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:05,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:05,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:05,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:05,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:05,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:05,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:05,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:05,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:05,938 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2020-10-27 14:20:05,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475678614] [2020-10-27 14:20:05,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:05,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:20:05,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876129699] [2020-10-27 14:20:05,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:20:05,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:05,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:20:05,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:20:05,940 INFO L87 Difference]: Start difference. First operand 141 states and 146 transitions. Second operand 18 states. [2020-10-27 14:20:06,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:06,314 INFO L93 Difference]: Finished difference Result 256 states and 268 transitions. [2020-10-27 14:20:06,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:20:06,315 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 135 [2020-10-27 14:20:06,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:06,317 INFO L225 Difference]: With dead ends: 256 [2020-10-27 14:20:06,317 INFO L226 Difference]: Without dead ends: 153 [2020-10-27 14:20:06,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:20:06,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-27 14:20:06,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 149. [2020-10-27 14:20:06,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-27 14:20:06,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 154 transitions. [2020-10-27 14:20:06,326 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 154 transitions. Word has length 135 [2020-10-27 14:20:06,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:06,326 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 154 transitions. [2020-10-27 14:20:06,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:20:06,326 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 154 transitions. [2020-10-27 14:20:06,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-27 14:20:06,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:06,328 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:06,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:20:06,329 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:06,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:06,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1305235866, now seen corresponding path program 15 times [2020-10-27 14:20:06,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:06,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31295229] [2020-10-27 14:20:06,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:06,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:06,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:06,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:06,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:06,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:11,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:11,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-27 14:20:11,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:20:11,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-27 14:20:11,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:11,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:20:11,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-27 14:20:11,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:20:11,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:11,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:11,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:11,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:11,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:11,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:11,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:11,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:11,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:11,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:11,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:11,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:11,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:11,678 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2020-10-27 14:20:11,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31295229] [2020-10-27 14:20:11,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:11,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:20:11,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007895258] [2020-10-27 14:20:11,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:20:11,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:11,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:20:11,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:20:11,680 INFO L87 Difference]: Start difference. First operand 149 states and 154 transitions. Second operand 19 states. [2020-10-27 14:20:12,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:12,175 INFO L93 Difference]: Finished difference Result 270 states and 282 transitions. [2020-10-27 14:20:12,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:20:12,176 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 143 [2020-10-27 14:20:12,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:12,178 INFO L225 Difference]: With dead ends: 270 [2020-10-27 14:20:12,178 INFO L226 Difference]: Without dead ends: 161 [2020-10-27 14:20:12,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:20:12,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-27 14:20:12,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 157. [2020-10-27 14:20:12,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-27 14:20:12,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 162 transitions. [2020-10-27 14:20:12,187 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 162 transitions. Word has length 143 [2020-10-27 14:20:12,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:12,188 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 162 transitions. [2020-10-27 14:20:12,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:20:12,188 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 162 transitions. [2020-10-27 14:20:12,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-27 14:20:12,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:12,190 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:12,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:20:12,190 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:12,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:12,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1743362978, now seen corresponding path program 16 times [2020-10-27 14:20:12,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:12,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769170256] [2020-10-27 14:20:12,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:12,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:12,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:12,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:12,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:12,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:17,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:17,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-27 14:20:17,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:20:17,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-10-27 14:20:17,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:17,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:20:17,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-27 14:20:17,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 14:20:17,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:17,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:17,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:17,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:17,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:17,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:17,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:17,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 14:20:17,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:17,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:17,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:17,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:17,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:17,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2020-10-27 14:20:17,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769170256] [2020-10-27 14:20:17,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:17,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:20:17,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612338080] [2020-10-27 14:20:17,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:20:17,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:17,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:20:17,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:20:17,607 INFO L87 Difference]: Start difference. First operand 157 states and 162 transitions. Second operand 20 states. [2020-10-27 14:20:18,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:18,078 INFO L93 Difference]: Finished difference Result 284 states and 296 transitions. [2020-10-27 14:20:18,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:20:18,078 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 151 [2020-10-27 14:20:18,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:18,080 INFO L225 Difference]: With dead ends: 284 [2020-10-27 14:20:18,080 INFO L226 Difference]: Without dead ends: 169 [2020-10-27 14:20:18,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:20:18,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-27 14:20:18,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 165. [2020-10-27 14:20:18,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-27 14:20:18,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 170 transitions. [2020-10-27 14:20:18,088 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 170 transitions. Word has length 151 [2020-10-27 14:20:18,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:18,089 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 170 transitions. [2020-10-27 14:20:18,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:20:18,089 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 170 transitions. [2020-10-27 14:20:18,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-27 14:20:18,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:18,090 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:18,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:20:18,091 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:18,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:18,092 INFO L82 PathProgramCache]: Analyzing trace with hash -395771306, now seen corresponding path program 17 times [2020-10-27 14:20:18,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:18,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081005139] [2020-10-27 14:20:18,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:18,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:18,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:18,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:18,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:18,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:23,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:23,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-27 14:20:23,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:20:23,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5074 [2020-10-27 14:20:23,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:23,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:20:23,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-27 14:20:23,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 14:20:23,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:23,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:23,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:23,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:23,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:23,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:23,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:23,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:23,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:23,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:23,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:23,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:23,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:23,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 867 trivial. 0 not checked. [2020-10-27 14:20:23,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081005139] [2020-10-27 14:20:23,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:23,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:20:23,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014243686] [2020-10-27 14:20:23,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:20:23,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:23,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:20:23,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:20:23,521 INFO L87 Difference]: Start difference. First operand 165 states and 170 transitions. Second operand 21 states. [2020-10-27 14:20:24,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:24,113 INFO L93 Difference]: Finished difference Result 298 states and 310 transitions. [2020-10-27 14:20:24,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:20:24,113 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 159 [2020-10-27 14:20:24,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:24,115 INFO L225 Difference]: With dead ends: 298 [2020-10-27 14:20:24,115 INFO L226 Difference]: Without dead ends: 177 [2020-10-27 14:20:24,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:20:24,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-27 14:20:24,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 173. [2020-10-27 14:20:24,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-27 14:20:24,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 178 transitions. [2020-10-27 14:20:24,125 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 178 transitions. Word has length 159 [2020-10-27 14:20:24,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:24,125 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 178 transitions. [2020-10-27 14:20:24,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:20:24,125 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 178 transitions. [2020-10-27 14:20:24,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-27 14:20:24,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:24,128 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:24,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:20:24,128 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:24,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:24,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1676441522, now seen corresponding path program 18 times [2020-10-27 14:20:24,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:24,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228863906] [2020-10-27 14:20:24,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:24,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:24,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:24,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:24,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:24,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:29,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:29,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-27 14:20:29,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:20:29,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-10-27 14:20:29,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:29,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:20:29,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-27 14:20:29,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 14:20:29,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:29,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:29,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:29,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:29,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:29,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:29,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:29,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:20:29,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:29,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:29,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:29,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:29,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:29,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 972 trivial. 0 not checked. [2020-10-27 14:20:29,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228863906] [2020-10-27 14:20:29,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:29,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:20:29,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162675511] [2020-10-27 14:20:29,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:20:29,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:29,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:20:29,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:20:29,588 INFO L87 Difference]: Start difference. First operand 173 states and 178 transitions. Second operand 22 states. [2020-10-27 14:20:30,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:30,168 INFO L93 Difference]: Finished difference Result 312 states and 324 transitions. [2020-10-27 14:20:30,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:20:30,168 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 167 [2020-10-27 14:20:30,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:30,169 INFO L225 Difference]: With dead ends: 312 [2020-10-27 14:20:30,170 INFO L226 Difference]: Without dead ends: 185 [2020-10-27 14:20:30,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:20:30,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-27 14:20:30,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 181. [2020-10-27 14:20:30,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-27 14:20:30,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 186 transitions. [2020-10-27 14:20:30,179 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 186 transitions. Word has length 167 [2020-10-27 14:20:30,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:30,179 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 186 transitions. [2020-10-27 14:20:30,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:20:30,180 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 186 transitions. [2020-10-27 14:20:30,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-27 14:20:30,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:30,181 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:30,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:20:30,181 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:30,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:30,182 INFO L82 PathProgramCache]: Analyzing trace with hash 905836102, now seen corresponding path program 19 times [2020-10-27 14:20:30,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:30,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317398439] [2020-10-27 14:20:30,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:30,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:30,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:30,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:30,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:30,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:35,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:35,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-27 14:20:35,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:20:35,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 14:20:35,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:35,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:20:35,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-27 14:20:35,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 14:20:35,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:35,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:35,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:35,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:35,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:35,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:35,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:35,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:35,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:35,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:35,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:35,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:35,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:35,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1083 trivial. 0 not checked. [2020-10-27 14:20:35,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317398439] [2020-10-27 14:20:35,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:35,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:20:35,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018092763] [2020-10-27 14:20:35,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:20:35,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:35,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:20:35,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:20:35,628 INFO L87 Difference]: Start difference. First operand 181 states and 186 transitions. Second operand 23 states. [2020-10-27 14:20:36,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:36,194 INFO L93 Difference]: Finished difference Result 326 states and 338 transitions. [2020-10-27 14:20:36,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:20:36,195 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 175 [2020-10-27 14:20:36,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:36,197 INFO L225 Difference]: With dead ends: 326 [2020-10-27 14:20:36,197 INFO L226 Difference]: Without dead ends: 193 [2020-10-27 14:20:36,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:20:36,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-27 14:20:36,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 189. [2020-10-27 14:20:36,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-27 14:20:36,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 194 transitions. [2020-10-27 14:20:36,208 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 194 transitions. Word has length 175 [2020-10-27 14:20:36,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:36,208 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 194 transitions. [2020-10-27 14:20:36,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:20:36,208 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 194 transitions. [2020-10-27 14:20:36,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-10-27 14:20:36,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:36,210 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:36,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:20:36,210 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:36,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:36,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1022342082, now seen corresponding path program 20 times [2020-10-27 14:20:36,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:36,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043082721] [2020-10-27 14:20:36,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:36,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:36,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:36,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:36,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:36,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:41,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:41,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-27 14:20:41,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:20:41,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5238 [2020-10-27 14:20:41,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:41,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:20:41,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 14:20:41,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 14:20:41,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:41,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:41,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:41,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:41,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:41,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:41,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:41,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:41,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:41,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:41,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:41,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:41,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:41,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2020-10-27 14:20:41,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043082721] [2020-10-27 14:20:41,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:41,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 14:20:41,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85050482] [2020-10-27 14:20:41,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 14:20:41,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:41,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 14:20:41,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:20:41,919 INFO L87 Difference]: Start difference. First operand 189 states and 194 transitions. Second operand 24 states. [2020-10-27 14:20:42,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:42,483 INFO L93 Difference]: Finished difference Result 340 states and 352 transitions. [2020-10-27 14:20:42,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:20:42,484 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 183 [2020-10-27 14:20:42,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:42,486 INFO L225 Difference]: With dead ends: 340 [2020-10-27 14:20:42,486 INFO L226 Difference]: Without dead ends: 201 [2020-10-27 14:20:42,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:20:42,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-27 14:20:42,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 197. [2020-10-27 14:20:42,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-27 14:20:42,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 202 transitions. [2020-10-27 14:20:42,496 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 202 transitions. Word has length 183 [2020-10-27 14:20:42,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:42,496 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 202 transitions. [2020-10-27 14:20:42,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 14:20:42,497 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 202 transitions. [2020-10-27 14:20:42,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-27 14:20:42,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:42,498 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:42,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:20:42,498 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:42,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:42,499 INFO L82 PathProgramCache]: Analyzing trace with hash -634222026, now seen corresponding path program 21 times [2020-10-27 14:20:42,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:42,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760014690] [2020-10-27 14:20:42,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:42,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:42,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:42,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:42,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:42,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:48,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:48,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-27 14:20:48,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:20:48,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5504 [2020-10-27 14:20:48,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:48,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 14:20:48,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 101 [2020-10-27 14:20:48,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 14:20:48,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:48,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:48,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:48,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:48,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:48,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:48,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:48,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:48,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:48,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:48,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:48,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:48,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:48,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1323 trivial. 0 not checked. [2020-10-27 14:20:48,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760014690] [2020-10-27 14:20:48,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:48,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:20:48,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910162388] [2020-10-27 14:20:48,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:20:48,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:48,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:20:48,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:20:48,506 INFO L87 Difference]: Start difference. First operand 197 states and 202 transitions. Second operand 25 states. [2020-10-27 14:20:49,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:49,064 INFO L93 Difference]: Finished difference Result 354 states and 366 transitions. [2020-10-27 14:20:49,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:20:49,068 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 191 [2020-10-27 14:20:49,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:49,069 INFO L225 Difference]: With dead ends: 354 [2020-10-27 14:20:49,069 INFO L226 Difference]: Without dead ends: 209 [2020-10-27 14:20:49,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:20:49,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-27 14:20:49,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 205. [2020-10-27 14:20:49,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-10-27 14:20:49,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 210 transitions. [2020-10-27 14:20:49,079 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 210 transitions. Word has length 191 [2020-10-27 14:20:49,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:49,079 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 210 transitions. [2020-10-27 14:20:49,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:20:49,079 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 210 transitions. [2020-10-27 14:20:49,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-10-27 14:20:49,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:49,081 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:49,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:20:49,081 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:49,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:49,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1672695762, now seen corresponding path program 22 times [2020-10-27 14:20:49,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:49,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138797785] [2020-10-27 14:20:49,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:49,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:49,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:49,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:49,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:49,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:54,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:54,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 209 [2020-10-27 14:20:54,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:20:54,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5091 [2020-10-27 14:20:54,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:54,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 14:20:54,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-27 14:20:54,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 14:20:54,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:54,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:54,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:54,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:54,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:54,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:54,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:54,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:54,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:54,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:54,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:54,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:54,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:54,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1452 trivial. 0 not checked. [2020-10-27 14:20:54,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138797785] [2020-10-27 14:20:54,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:54,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 14:20:54,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052325877] [2020-10-27 14:20:54,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 14:20:54,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:54,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 14:20:54,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:20:54,708 INFO L87 Difference]: Start difference. First operand 205 states and 210 transitions. Second operand 26 states. [2020-10-27 14:20:55,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:55,291 INFO L93 Difference]: Finished difference Result 368 states and 380 transitions. [2020-10-27 14:20:55,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:20:55,291 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 199 [2020-10-27 14:20:55,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:55,293 INFO L225 Difference]: With dead ends: 368 [2020-10-27 14:20:55,293 INFO L226 Difference]: Without dead ends: 217 [2020-10-27 14:20:55,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:20:55,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-27 14:20:55,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 213. [2020-10-27 14:20:55,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-10-27 14:20:55,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 218 transitions. [2020-10-27 14:20:55,305 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 218 transitions. Word has length 199 [2020-10-27 14:20:55,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:55,305 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 218 transitions. [2020-10-27 14:20:55,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 14:20:55,305 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 218 transitions. [2020-10-27 14:20:55,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-27 14:20:55,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:55,307 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:55,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:20:55,307 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:55,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:55,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1270432218, now seen corresponding path program 23 times [2020-10-27 14:20:55,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:55,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797207395] [2020-10-27 14:20:55,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:55,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:55,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:55,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:55,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:55,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:00,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:00,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-27 14:21:00,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:21:00,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5093 [2020-10-27 14:21:00,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:00,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:21:00,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 109 [2020-10-27 14:21:00,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 14:21:00,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:01,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:01,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:01,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:01,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:01,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:01,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:01,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:21:01,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:01,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:01,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:01,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:01,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:01,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1587 trivial. 0 not checked. [2020-10-27 14:21:01,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797207395] [2020-10-27 14:21:01,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:01,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:21:01,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030841544] [2020-10-27 14:21:01,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:21:01,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:01,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:21:01,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:21:01,108 INFO L87 Difference]: Start difference. First operand 213 states and 218 transitions. Second operand 27 states. [2020-10-27 14:21:01,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:01,691 INFO L93 Difference]: Finished difference Result 382 states and 394 transitions. [2020-10-27 14:21:01,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:21:01,692 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 207 [2020-10-27 14:21:01,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:01,694 INFO L225 Difference]: With dead ends: 382 [2020-10-27 14:21:01,694 INFO L226 Difference]: Without dead ends: 225 [2020-10-27 14:21:01,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:21:01,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-27 14:21:01,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 221. [2020-10-27 14:21:01,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-10-27 14:21:01,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 226 transitions. [2020-10-27 14:21:01,705 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 226 transitions. Word has length 207 [2020-10-27 14:21:01,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:01,705 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 226 transitions. [2020-10-27 14:21:01,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:21:01,706 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 226 transitions. [2020-10-27 14:21:01,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-10-27 14:21:01,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:01,707 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:01,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:21:01,708 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:01,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:01,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1460188190, now seen corresponding path program 24 times [2020-10-27 14:21:01,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:01,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406981778] [2020-10-27 14:21:01,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:01,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:01,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:01,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:01,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:01,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:06,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:06,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 225 [2020-10-27 14:21:06,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:21:06,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5170 [2020-10-27 14:21:06,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:06,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 14:21:06,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 113 [2020-10-27 14:21:06,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 14:21:06,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:07,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:07,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:07,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:07,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:07,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:07,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:07,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:21:07,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:07,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:07,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:07,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:07,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:07,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1728 trivial. 0 not checked. [2020-10-27 14:21:07,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406981778] [2020-10-27 14:21:07,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:07,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 14:21:07,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859933222] [2020-10-27 14:21:07,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 14:21:07,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:07,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 14:21:07,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:21:07,490 INFO L87 Difference]: Start difference. First operand 221 states and 226 transitions. Second operand 28 states. [2020-10-27 14:21:08,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:08,245 INFO L93 Difference]: Finished difference Result 396 states and 408 transitions. [2020-10-27 14:21:08,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:21:08,246 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 215 [2020-10-27 14:21:08,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:08,247 INFO L225 Difference]: With dead ends: 396 [2020-10-27 14:21:08,248 INFO L226 Difference]: Without dead ends: 233 [2020-10-27 14:21:08,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:21:08,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-27 14:21:08,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 229. [2020-10-27 14:21:08,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-27 14:21:08,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 234 transitions. [2020-10-27 14:21:08,263 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 234 transitions. Word has length 215 [2020-10-27 14:21:08,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:08,263 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 234 transitions. [2020-10-27 14:21:08,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 14:21:08,263 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 234 transitions. [2020-10-27 14:21:08,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-10-27 14:21:08,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:08,265 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:08,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:21:08,265 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:08,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:08,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1132106262, now seen corresponding path program 25 times [2020-10-27 14:21:08,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:08,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045049740] [2020-10-27 14:21:08,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:08,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:08,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:08,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:08,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:08,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:13,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:13,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-27 14:21:13,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:21:13,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5416 [2020-10-27 14:21:13,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:13,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 14:21:13,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 117 [2020-10-27 14:21:13,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 14:21:13,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:14,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:14,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:14,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:14,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:14,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:14,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:14,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:21:14,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:14,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:14,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:14,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:14,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:14,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 1875 trivial. 0 not checked. [2020-10-27 14:21:14,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045049740] [2020-10-27 14:21:14,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:14,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 14:21:14,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761192096] [2020-10-27 14:21:14,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 14:21:14,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:14,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 14:21:14,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:21:14,360 INFO L87 Difference]: Start difference. First operand 229 states and 234 transitions. Second operand 29 states. [2020-10-27 14:21:15,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:15,154 INFO L93 Difference]: Finished difference Result 410 states and 422 transitions. [2020-10-27 14:21:15,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:21:15,155 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 223 [2020-10-27 14:21:15,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:15,157 INFO L225 Difference]: With dead ends: 410 [2020-10-27 14:21:15,157 INFO L226 Difference]: Without dead ends: 241 [2020-10-27 14:21:15,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:21:15,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-27 14:21:15,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 237. [2020-10-27 14:21:15,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-27 14:21:15,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 242 transitions. [2020-10-27 14:21:15,169 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 242 transitions. Word has length 223 [2020-10-27 14:21:15,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:15,169 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 242 transitions. [2020-10-27 14:21:15,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 14:21:15,170 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 242 transitions. [2020-10-27 14:21:15,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-27 14:21:15,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:15,172 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:15,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:21:15,172 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:15,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:15,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1031514098, now seen corresponding path program 26 times [2020-10-27 14:21:15,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:15,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812053044] [2020-10-27 14:21:15,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:15,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:15,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:15,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:15,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:15,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:20,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:20,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 241 [2020-10-27 14:21:20,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:21:20,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5228 [2020-10-27 14:21:20,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:20,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 14:21:20,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 121 [2020-10-27 14:21:20,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 14:21:20,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:21,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:21,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:21,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:21,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:21,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:21,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:21,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:21:21,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:21,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:21,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:21,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:21,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:21,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 2028 trivial. 0 not checked. [2020-10-27 14:21:21,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812053044] [2020-10-27 14:21:21,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:21,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 14:21:21,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814427725] [2020-10-27 14:21:21,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 14:21:21,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:21,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 14:21:21,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:21:21,140 INFO L87 Difference]: Start difference. First operand 237 states and 242 transitions. Second operand 30 states. [2020-10-27 14:21:21,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:21,854 INFO L93 Difference]: Finished difference Result 424 states and 436 transitions. [2020-10-27 14:21:21,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 14:21:21,855 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 231 [2020-10-27 14:21:21,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:21,859 INFO L225 Difference]: With dead ends: 424 [2020-10-27 14:21:21,859 INFO L226 Difference]: Without dead ends: 249 [2020-10-27 14:21:21,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:21:21,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-27 14:21:21,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 245. [2020-10-27 14:21:21,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-10-27 14:21:21,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 250 transitions. [2020-10-27 14:21:21,871 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 250 transitions. Word has length 231 [2020-10-27 14:21:21,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:21,871 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 250 transitions. [2020-10-27 14:21:21,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 14:21:21,872 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 250 transitions. [2020-10-27 14:21:21,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-10-27 14:21:21,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:21,873 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:21,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:21:21,874 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:21,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:21,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1492253178, now seen corresponding path program 27 times [2020-10-27 14:21:21,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:21,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295320675] [2020-10-27 14:21:21,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:21,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:21,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:21,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:21,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:22,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:26,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:26,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 249 [2020-10-27 14:21:26,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:21:26,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5093 [2020-10-27 14:21:26,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:26,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 14:21:26,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 125 [2020-10-27 14:21:26,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 14:21:26,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:27,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:27,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:27,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:27,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:27,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:27,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:27,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:21:27,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:27,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:27,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:27,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:27,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:27,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 2187 trivial. 0 not checked. [2020-10-27 14:21:27,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295320675] [2020-10-27 14:21:27,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:27,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 14:21:27,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014826292] [2020-10-27 14:21:27,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 14:21:27,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:27,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 14:21:27,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:21:27,730 INFO L87 Difference]: Start difference. First operand 245 states and 250 transitions. Second operand 31 states. [2020-10-27 14:21:28,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:28,577 INFO L93 Difference]: Finished difference Result 438 states and 450 transitions. [2020-10-27 14:21:28,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 14:21:28,577 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 239 [2020-10-27 14:21:28,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:28,579 INFO L225 Difference]: With dead ends: 438 [2020-10-27 14:21:28,579 INFO L226 Difference]: Without dead ends: 257 [2020-10-27 14:21:28,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:21:28,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-27 14:21:28,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 253. [2020-10-27 14:21:28,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-27 14:21:28,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 258 transitions. [2020-10-27 14:21:28,590 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 258 transitions. Word has length 239 [2020-10-27 14:21:28,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:28,591 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 258 transitions. [2020-10-27 14:21:28,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 14:21:28,591 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 258 transitions. [2020-10-27 14:21:28,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-10-27 14:21:28,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:28,593 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:28,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:21:28,593 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:28,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:28,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1308597246, now seen corresponding path program 28 times [2020-10-27 14:21:28,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:28,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1419131966] [2020-10-27 14:21:28,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:28,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:28,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:28,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:28,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:28,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:33,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:33,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 257 [2020-10-27 14:21:33,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:21:33,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5257 [2020-10-27 14:21:33,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:33,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 14:21:33,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 129 [2020-10-27 14:21:33,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 14:21:33,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:34,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:34,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:34,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:34,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:34,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:34,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:34,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:21:34,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:34,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:34,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:34,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:34,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:34,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 2352 trivial. 0 not checked. [2020-10-27 14:21:34,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1419131966] [2020-10-27 14:21:34,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:34,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 14:21:34,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560068267] [2020-10-27 14:21:34,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 14:21:34,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:34,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 14:21:34,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:21:34,658 INFO L87 Difference]: Start difference. First operand 253 states and 258 transitions. Second operand 32 states. [2020-10-27 14:21:35,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:35,398 INFO L93 Difference]: Finished difference Result 452 states and 464 transitions. [2020-10-27 14:21:35,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:21:35,399 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 247 [2020-10-27 14:21:35,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:35,401 INFO L225 Difference]: With dead ends: 452 [2020-10-27 14:21:35,401 INFO L226 Difference]: Without dead ends: 265 [2020-10-27 14:21:35,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:21:35,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-10-27 14:21:35,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 261. [2020-10-27 14:21:35,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-27 14:21:35,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 266 transitions. [2020-10-27 14:21:35,412 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 266 transitions. Word has length 247 [2020-10-27 14:21:35,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:35,413 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 266 transitions. [2020-10-27 14:21:35,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 14:21:35,413 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 266 transitions. [2020-10-27 14:21:35,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-10-27 14:21:35,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:35,415 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:35,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:21:35,415 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:35,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:35,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1639900682, now seen corresponding path program 29 times [2020-10-27 14:21:35,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:35,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817073616] [2020-10-27 14:21:35,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:35,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:35,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:35,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:35,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:35,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:41,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:41,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 265 [2020-10-27 14:21:41,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:21:41,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5635 [2020-10-27 14:21:41,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:41,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 14:21:41,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 133 [2020-10-27 14:21:41,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 14:21:41,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:41,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:41,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:41,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:41,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:41,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:41,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:41,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:21:41,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:41,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:41,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:41,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:41,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:41,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 2523 trivial. 0 not checked. [2020-10-27 14:21:41,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817073616] [2020-10-27 14:21:41,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:41,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 14:21:41,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955841918] [2020-10-27 14:21:41,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 14:21:41,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:41,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 14:21:41,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:21:41,896 INFO L87 Difference]: Start difference. First operand 261 states and 266 transitions. Second operand 33 states. [2020-10-27 14:21:42,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:42,747 INFO L93 Difference]: Finished difference Result 466 states and 478 transitions. [2020-10-27 14:21:42,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 14:21:42,747 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 255 [2020-10-27 14:21:42,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:42,749 INFO L225 Difference]: With dead ends: 466 [2020-10-27 14:21:42,749 INFO L226 Difference]: Without dead ends: 273 [2020-10-27 14:21:42,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:21:42,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-10-27 14:21:42,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 269. [2020-10-27 14:21:42,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-27 14:21:42,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 274 transitions. [2020-10-27 14:21:42,761 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 274 transitions. Word has length 255 [2020-10-27 14:21:42,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:42,761 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 274 transitions. [2020-10-27 14:21:42,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 14:21:42,761 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 274 transitions. [2020-10-27 14:21:42,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-10-27 14:21:42,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:42,763 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:42,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 14:21:42,763 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:42,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:42,764 INFO L82 PathProgramCache]: Analyzing trace with hash 146440174, now seen corresponding path program 30 times [2020-10-27 14:21:42,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:42,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22685634] [2020-10-27 14:21:42,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:42,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:42,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:42,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:42,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:43,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:47,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:47,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 273 [2020-10-27 14:21:47,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:21:47,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5163 [2020-10-27 14:21:47,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:47,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 14:21:47,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 137 [2020-10-27 14:21:47,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 14:21:47,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:48,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:48,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:48,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:48,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:48,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:48,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:48,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:21:48,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:48,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:48,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:48,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:48,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:48,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2700 trivial. 0 not checked. [2020-10-27 14:21:48,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22685634] [2020-10-27 14:21:48,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:48,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 14:21:48,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633444072] [2020-10-27 14:21:48,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 14:21:48,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:48,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 14:21:48,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:21:48,830 INFO L87 Difference]: Start difference. First operand 269 states and 274 transitions. Second operand 34 states. [2020-10-27 14:21:49,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:49,560 INFO L93 Difference]: Finished difference Result 480 states and 492 transitions. [2020-10-27 14:21:49,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 14:21:49,560 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 263 [2020-10-27 14:21:49,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:49,562 INFO L225 Difference]: With dead ends: 480 [2020-10-27 14:21:49,562 INFO L226 Difference]: Without dead ends: 281 [2020-10-27 14:21:49,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:21:49,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-27 14:21:49,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 277. [2020-10-27 14:21:49,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-27 14:21:49,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 282 transitions. [2020-10-27 14:21:49,575 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 282 transitions. Word has length 263 [2020-10-27 14:21:49,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:49,575 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 282 transitions. [2020-10-27 14:21:49,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 14:21:49,575 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 282 transitions. [2020-10-27 14:21:49,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-10-27 14:21:49,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:49,577 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:49,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 14:21:49,579 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:49,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:49,579 INFO L82 PathProgramCache]: Analyzing trace with hash -2007773722, now seen corresponding path program 31 times [2020-10-27 14:21:49,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:49,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957269718] [2020-10-27 14:21:49,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:49,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:49,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:49,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:49,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:49,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:54,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:54,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 281 [2020-10-27 14:21:54,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:21:54,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5086 [2020-10-27 14:21:54,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:54,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 14:21:54,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 141 [2020-10-27 14:21:54,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 14:21:54,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:55,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:55,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:55,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:55,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:55,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:55,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:55,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:21:55,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:55,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:55,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:55,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:55,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:55,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 2883 trivial. 0 not checked. [2020-10-27 14:21:55,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957269718] [2020-10-27 14:21:55,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:55,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 14:21:55,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882712578] [2020-10-27 14:21:55,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 14:21:55,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:55,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 14:21:55,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:21:55,609 INFO L87 Difference]: Start difference. First operand 277 states and 282 transitions. Second operand 35 states. [2020-10-27 14:21:56,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:56,457 INFO L93 Difference]: Finished difference Result 494 states and 506 transitions. [2020-10-27 14:21:56,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 14:21:56,457 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 271 [2020-10-27 14:21:56,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:56,462 INFO L225 Difference]: With dead ends: 494 [2020-10-27 14:21:56,463 INFO L226 Difference]: Without dead ends: 289 [2020-10-27 14:21:56,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:21:56,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-10-27 14:21:56,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 285. [2020-10-27 14:21:56,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2020-10-27 14:21:56,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 290 transitions. [2020-10-27 14:21:56,480 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 290 transitions. Word has length 271 [2020-10-27 14:21:56,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:56,480 INFO L481 AbstractCegarLoop]: Abstraction has 285 states and 290 transitions. [2020-10-27 14:21:56,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 14:21:56,480 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 290 transitions. [2020-10-27 14:21:56,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-10-27 14:21:56,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:56,482 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:56,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 14:21:56,483 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:56,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:56,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1577778210, now seen corresponding path program 32 times [2020-10-27 14:21:56,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:56,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435112173] [2020-10-27 14:21:56,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:56,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:56,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:56,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:56,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:56,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:01,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:01,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 289 [2020-10-27 14:22:01,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:22:01,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5393 [2020-10-27 14:22:01,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:01,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 14:22:01,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 145 [2020-10-27 14:22:01,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 14:22:01,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:02,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:02,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:02,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:02,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:02,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:02,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:02,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:22:02,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:02,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:02,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:02,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:02,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:02,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 3072 trivial. 0 not checked. [2020-10-27 14:22:02,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435112173] [2020-10-27 14:22:02,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:02,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 14:22:02,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051913553] [2020-10-27 14:22:02,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 14:22:02,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:02,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 14:22:02,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:22:02,865 INFO L87 Difference]: Start difference. First operand 285 states and 290 transitions. Second operand 36 states. [2020-10-27 14:22:03,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:03,720 INFO L93 Difference]: Finished difference Result 508 states and 520 transitions. [2020-10-27 14:22:03,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 14:22:03,721 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 279 [2020-10-27 14:22:03,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:03,722 INFO L225 Difference]: With dead ends: 508 [2020-10-27 14:22:03,722 INFO L226 Difference]: Without dead ends: 297 [2020-10-27 14:22:03,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:22:03,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-27 14:22:03,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 293. [2020-10-27 14:22:03,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2020-10-27 14:22:03,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 298 transitions. [2020-10-27 14:22:03,734 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 298 transitions. Word has length 279 [2020-10-27 14:22:03,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:03,734 INFO L481 AbstractCegarLoop]: Abstraction has 293 states and 298 transitions. [2020-10-27 14:22:03,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 14:22:03,734 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 298 transitions. [2020-10-27 14:22:03,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-10-27 14:22:03,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:03,736 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:03,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 14:22:03,737 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:03,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:03,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1686512086, now seen corresponding path program 33 times [2020-10-27 14:22:03,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:03,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392515255] [2020-10-27 14:22:03,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:03,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:03,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:03,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:03,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:04,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:09,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:09,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 297 [2020-10-27 14:22:09,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:22:09,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5397 [2020-10-27 14:22:09,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:09,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 14:22:09,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 149 [2020-10-27 14:22:09,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 14:22:09,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:10,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:10,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:10,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:10,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:10,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:10,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:10,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:22:10,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:10,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:10,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:10,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:10,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:10,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 3267 trivial. 0 not checked. [2020-10-27 14:22:10,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392515255] [2020-10-27 14:22:10,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:10,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 14:22:10,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530510168] [2020-10-27 14:22:10,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 14:22:10,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:10,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 14:22:10,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:22:10,201 INFO L87 Difference]: Start difference. First operand 293 states and 298 transitions. Second operand 37 states. [2020-10-27 14:22:11,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:11,216 INFO L93 Difference]: Finished difference Result 522 states and 534 transitions. [2020-10-27 14:22:11,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 14:22:11,216 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 287 [2020-10-27 14:22:11,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:11,219 INFO L225 Difference]: With dead ends: 522 [2020-10-27 14:22:11,219 INFO L226 Difference]: Without dead ends: 305 [2020-10-27 14:22:11,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:22:11,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-10-27 14:22:11,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 301. [2020-10-27 14:22:11,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-10-27 14:22:11,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 306 transitions. [2020-10-27 14:22:11,231 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 306 transitions. Word has length 287 [2020-10-27 14:22:11,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:11,231 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 306 transitions. [2020-10-27 14:22:11,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 14:22:11,231 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 306 transitions. [2020-10-27 14:22:11,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2020-10-27 14:22:11,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:11,233 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:11,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 14:22:11,233 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:11,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:11,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1760503758, now seen corresponding path program 34 times [2020-10-27 14:22:11,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:11,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659424148] [2020-10-27 14:22:11,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:11,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:11,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:11,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:11,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:11,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:17,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:17,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 305 [2020-10-27 14:22:17,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:22:17,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5850 [2020-10-27 14:22:17,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:17,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 14:22:17,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 153 [2020-10-27 14:22:17,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 14:22:17,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:18,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:18,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:18,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:18,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:18,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:18,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:18,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:22:18,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:18,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:18,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:18,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:18,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:18,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 3468 trivial. 0 not checked. [2020-10-27 14:22:18,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659424148] [2020-10-27 14:22:18,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:18,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 14:22:18,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480295867] [2020-10-27 14:22:18,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 14:22:18,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:18,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 14:22:18,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:22:18,198 INFO L87 Difference]: Start difference. First operand 301 states and 306 transitions. Second operand 38 states. [2020-10-27 14:22:19,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:19,131 INFO L93 Difference]: Finished difference Result 536 states and 548 transitions. [2020-10-27 14:22:19,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 14:22:19,132 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 295 [2020-10-27 14:22:19,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:19,135 INFO L225 Difference]: With dead ends: 536 [2020-10-27 14:22:19,135 INFO L226 Difference]: Without dead ends: 313 [2020-10-27 14:22:19,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:22:19,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-27 14:22:19,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 309. [2020-10-27 14:22:19,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2020-10-27 14:22:19,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 314 transitions. [2020-10-27 14:22:19,145 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 314 transitions. Word has length 295 [2020-10-27 14:22:19,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:19,146 INFO L481 AbstractCegarLoop]: Abstraction has 309 states and 314 transitions. [2020-10-27 14:22:19,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 14:22:19,146 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 314 transitions. [2020-10-27 14:22:19,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-10-27 14:22:19,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:19,147 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:19,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 14:22:19,148 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:19,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:19,148 INFO L82 PathProgramCache]: Analyzing trace with hash -770173498, now seen corresponding path program 35 times [2020-10-27 14:22:19,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:19,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700481143] [2020-10-27 14:22:19,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:19,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:19,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:19,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:19,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:19,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:24,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:24,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 313 [2020-10-27 14:22:24,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:22:24,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5564 [2020-10-27 14:22:24,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:24,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 14:22:24,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 157 [2020-10-27 14:22:24,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 14:22:24,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:25,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:25,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:25,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:25,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:25,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:25,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:25,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:22:25,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:25,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:25,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:25,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:25,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:25,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 3675 trivial. 0 not checked. [2020-10-27 14:22:25,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700481143] [2020-10-27 14:22:25,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:25,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 14:22:25,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330258201] [2020-10-27 14:22:25,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 14:22:25,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:25,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 14:22:25,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:22:25,842 INFO L87 Difference]: Start difference. First operand 309 states and 314 transitions. Second operand 39 states. [2020-10-27 14:22:26,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:26,974 INFO L93 Difference]: Finished difference Result 550 states and 562 transitions. [2020-10-27 14:22:26,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 14:22:26,975 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 303 [2020-10-27 14:22:26,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:26,978 INFO L225 Difference]: With dead ends: 550 [2020-10-27 14:22:26,978 INFO L226 Difference]: Without dead ends: 321 [2020-10-27 14:22:26,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:22:26,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-10-27 14:22:26,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 317. [2020-10-27 14:22:26,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2020-10-27 14:22:26,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 322 transitions. [2020-10-27 14:22:26,989 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 322 transitions. Word has length 303 [2020-10-27 14:22:26,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:26,989 INFO L481 AbstractCegarLoop]: Abstraction has 317 states and 322 transitions. [2020-10-27 14:22:26,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 14:22:26,990 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 322 transitions. [2020-10-27 14:22:26,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2020-10-27 14:22:26,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:26,992 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:26,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 14:22:26,992 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:26,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:26,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1290333118, now seen corresponding path program 36 times [2020-10-27 14:22:26,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:26,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559275542] [2020-10-27 14:22:26,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:27,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:27,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:27,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:27,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:27,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:32,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:32,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 321 [2020-10-27 14:22:32,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:22:32,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5319 [2020-10-27 14:22:32,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:32,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 14:22:32,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 161 [2020-10-27 14:22:32,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 14:22:32,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:33,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:33,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:33,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:33,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:33,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:33,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:33,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:22:33,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:33,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:33,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:33,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:33,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:33,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 3888 trivial. 0 not checked. [2020-10-27 14:22:33,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559275542] [2020-10-27 14:22:33,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:33,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 14:22:33,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960946211] [2020-10-27 14:22:33,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 14:22:33,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:33,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 14:22:33,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 14:22:33,579 INFO L87 Difference]: Start difference. First operand 317 states and 322 transitions. Second operand 40 states.