/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_copy7_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:18:57,258 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:18:57,261 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:18:57,302 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:18:57,303 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:18:57,304 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:18:57,306 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:18:57,308 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:18:57,310 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:18:57,312 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:18:57,333 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:18:57,338 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:18:57,339 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:18:57,349 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:18:57,351 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:18:57,355 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:18:57,356 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:18:57,357 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:18:57,362 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:18:57,368 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:18:57,370 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:18:57,371 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:18:57,372 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:18:57,373 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:18:57,376 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:18:57,376 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:18:57,377 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:18:57,378 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:18:57,378 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:18:57,379 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:18:57,380 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:18:57,380 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:18:57,381 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:18:57,382 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:18:57,383 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:18:57,384 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:18:57,384 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:18:57,384 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:18:57,385 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:18:57,386 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:18:57,386 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:18:57,387 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 14:18:57,416 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:18:57,417 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:18:57,418 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:18:57,418 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:18:57,418 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:18:57,419 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:18:57,419 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:18:57,420 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:18:57,420 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:18:57,420 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:18:57,421 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:18:57,421 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:18:57,422 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:18:57,422 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:18:57,422 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:18:57,422 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:18:57,422 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:18:57,423 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:18:57,423 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:18:57,423 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:18:57,423 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:18:57,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:18:57,424 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:18:57,424 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:18:57,424 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:18:57,424 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:18:57,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:18:57,425 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:18:57,425 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:18:57,425 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:18:57,853 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:18:57,880 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:18:57,883 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:18:57,885 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:18:57,885 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:18:57,887 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy7_ground-1.i [2020-10-27 14:18:57,969 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2afbc0e9b/bac2da9fd92f473397f5a7b954ca0653/FLAGa12ec3292 [2020-10-27 14:18:58,628 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:18:58,629 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy7_ground-1.i [2020-10-27 14:18:58,637 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2afbc0e9b/bac2da9fd92f473397f5a7b954ca0653/FLAGa12ec3292 [2020-10-27 14:18:58,943 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2afbc0e9b/bac2da9fd92f473397f5a7b954ca0653 [2020-10-27 14:18:58,946 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:18:58,954 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:18:58,955 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:18:58,955 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:18:58,960 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:18:58,961 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:18:58" (1/1) ... [2020-10-27 14:18:58,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d846b01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:58, skipping insertion in model container [2020-10-27 14:18:58,964 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:18:58" (1/1) ... [2020-10-27 14:18:58,973 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:18:58,992 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:18:59,176 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:18:59,186 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:18:59,217 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:18:59,235 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:18:59,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:59 WrapperNode [2020-10-27 14:18:59,235 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:18:59,237 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:18:59,240 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:18:59,240 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:18:59,278 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:59" (1/1) ... [2020-10-27 14:18:59,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:59" (1/1) ... [2020-10-27 14:18:59,311 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:59" (1/1) ... [2020-10-27 14:18:59,312 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:59" (1/1) ... [2020-10-27 14:18:59,345 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:59" (1/1) ... [2020-10-27 14:18:59,353 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:59" (1/1) ... [2020-10-27 14:18:59,355 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:59" (1/1) ... [2020-10-27 14:18:59,358 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:18:59,359 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:18:59,359 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:18:59,360 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:18:59,361 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:59" (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 14:18:59,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:18:59,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:18:59,452 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:18:59,452 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:18:59,452 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:18:59,452 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:18:59,453 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:18:59,453 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 14:18:59,453 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 14:18:59,453 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:18:59,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:18:59,453 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:18:59,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:18:59,454 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:18:59,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:18:59,454 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:18:59,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:18:59,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:18:59,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:18:59,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:18:59,965 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:18:59,965 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-27 14:18:59,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:18:59 BoogieIcfgContainer [2020-10-27 14:18:59,967 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:18:59,969 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:18:59,969 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:18:59,973 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:18:59,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:18:58" (1/3) ... [2020-10-27 14:18:59,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7172802d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:18:59, skipping insertion in model container [2020-10-27 14:18:59,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:59" (2/3) ... [2020-10-27 14:18:59,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7172802d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:18:59, skipping insertion in model container [2020-10-27 14:18:59,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:18:59" (3/3) ... [2020-10-27 14:18:59,977 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy7_ground-1.i [2020-10-27 14:18:59,989 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:18:59,995 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:19:00,010 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:19:00,038 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:19:00,038 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:19:00,038 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:19:00,038 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:19:00,038 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:19:00,039 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:19:00,039 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:19:00,039 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:19:00,058 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-10-27 14:19:00,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 14:19:00,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:00,066 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] [2020-10-27 14:19:00,067 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:00,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:00,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1013743180, now seen corresponding path program 1 times [2020-10-27 14:19:00,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:00,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129635616] [2020-10-27 14:19:00,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:00,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:00,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:00,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:00,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:00,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:00,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:00,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:00,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:00,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:03,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:03,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 14:19:03,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:19:03,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2793 [2020-10-27 14:19:03,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:03,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:19:03,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:19:03,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 14:19:03,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 14:19:03,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:03,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:03,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:03,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:03,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:03,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:03,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:19:03,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:03,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:03,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:03,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:03,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:03,197 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 14:19:03,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129635616] [2020-10-27 14:19:03,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:19:03,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:19:03,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150920591] [2020-10-27 14:19:03,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:19:03,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:03,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:19:03,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:19:03,227 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 4 states. [2020-10-27 14:19:03,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:03,480 INFO L93 Difference]: Finished difference Result 103 states and 155 transitions. [2020-10-27 14:19:03,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:19:03,483 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-27 14:19:03,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:03,493 INFO L225 Difference]: With dead ends: 103 [2020-10-27 14:19:03,494 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 14:19:03,502 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 14:19:03,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 14:19:03,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2020-10-27 14:19:03,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 14:19:03,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-10-27 14:19:03,556 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 29 [2020-10-27 14:19:03,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:03,556 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-10-27 14:19:03,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:19:03,557 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-10-27 14:19:03,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 14:19:03,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:03,559 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:03,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:19:03,560 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:03,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:03,561 INFO L82 PathProgramCache]: Analyzing trace with hash 188130124, now seen corresponding path program 1 times [2020-10-27 14:19:03,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:03,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392298287] [2020-10-27 14:19:03,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:03,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:03,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:03,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:03,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:03,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:03,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:03,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:03,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:08,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:08,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:08,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 14:19:08,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:19:08,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:19:08,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:08,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:19:08,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-27 14:19:08,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 14:19:08,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:08,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:08,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:08,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:08,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:08,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:08,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:08,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:19:08,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:08,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:08,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:08,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:08,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:08,674 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 14:19:08,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392298287] [2020-10-27 14:19:08,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:08,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 14:19:08,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953124547] [2020-10-27 14:19:08,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:19:08,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:08,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:19:08,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:19:08,679 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 5 states. [2020-10-27 14:19:08,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:08,923 INFO L93 Difference]: Finished difference Result 107 states and 128 transitions. [2020-10-27 14:19:08,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:19:08,923 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-10-27 14:19:08,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:08,925 INFO L225 Difference]: With dead ends: 107 [2020-10-27 14:19:08,925 INFO L226 Difference]: Without dead ends: 70 [2020-10-27 14:19:08,927 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 14:19:08,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-27 14:19:08,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2020-10-27 14:19:08,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 14:19:08,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2020-10-27 14:19:08,940 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 43 [2020-10-27 14:19:08,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:08,940 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2020-10-27 14:19:08,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:19:08,941 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2020-10-27 14:19:08,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 14:19:08,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:08,944 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:08,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:19:08,944 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:08,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:08,945 INFO L82 PathProgramCache]: Analyzing trace with hash 139617246, now seen corresponding path program 2 times [2020-10-27 14:19:08,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:08,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036779224] [2020-10-27 14:19:08,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:08,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:08,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:09,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:09,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:09,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:09,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:09,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:10,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:13,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:13,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 14:19:13,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:19:13,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 14:19:13,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:13,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:19:13,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 14:19:13,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:19:13,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:14,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:14,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:14,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:14,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:14,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:14,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:14,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:19:14,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:14,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:14,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:14,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:14,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:14,065 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-27 14:19:14,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036779224] [2020-10-27 14:19:14,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:14,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:19:14,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285503502] [2020-10-27 14:19:14,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:19:14,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:14,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:19:14,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:19:14,068 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand 6 states. [2020-10-27 14:19:14,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:14,317 INFO L93 Difference]: Finished difference Result 133 states and 154 transitions. [2020-10-27 14:19:14,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:19:14,318 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-27 14:19:14,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:14,319 INFO L225 Difference]: With dead ends: 133 [2020-10-27 14:19:14,320 INFO L226 Difference]: Without dead ends: 84 [2020-10-27 14:19:14,321 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 14:19:14,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-27 14:19:14,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 77. [2020-10-27 14:19:14,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 14:19:14,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2020-10-27 14:19:14,333 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 57 [2020-10-27 14:19:14,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:14,333 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2020-10-27 14:19:14,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:19:14,333 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2020-10-27 14:19:14,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 14:19:14,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:14,336 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:14,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:19:14,336 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:14,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:14,337 INFO L82 PathProgramCache]: Analyzing trace with hash -277529360, now seen corresponding path program 3 times [2020-10-27 14:19:14,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:14,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454952128] [2020-10-27 14:19:14,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:14,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:14,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:14,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:14,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:14,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:14,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:14,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:19,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:19,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 14:19:19,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:19:19,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:19:19,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:19,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:19:19,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-27 14:19:19,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 14:19:19,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:19,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:19,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:19,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:19,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:19,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:19,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:19,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 14:19:19,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:19,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:19,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:19,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:19,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:19,477 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-10-27 14:19:19,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454952128] [2020-10-27 14:19:19,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:19,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:19:19,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056479122] [2020-10-27 14:19:19,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:19:19,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:19,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:19:19,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:19:19,480 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand 7 states. [2020-10-27 14:19:19,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:19,816 INFO L93 Difference]: Finished difference Result 159 states and 180 transitions. [2020-10-27 14:19:19,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:19:19,816 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 71 [2020-10-27 14:19:19,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:19,818 INFO L225 Difference]: With dead ends: 159 [2020-10-27 14:19:19,818 INFO L226 Difference]: Without dead ends: 98 [2020-10-27 14:19:19,819 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 14:19:19,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-27 14:19:19,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 91. [2020-10-27 14:19:19,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 14:19:19,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2020-10-27 14:19:19,842 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 71 [2020-10-27 14:19:19,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:19,842 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 99 transitions. [2020-10-27 14:19:19,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:19:19,842 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 99 transitions. [2020-10-27 14:19:19,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 14:19:19,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:19,851 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:19,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:19:19,852 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:19,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:19,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1826992510, now seen corresponding path program 4 times [2020-10-27 14:19:19,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:19,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797356453] [2020-10-27 14:19:19,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:19,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:19,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:19,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:19,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:20,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:20,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:20,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:24,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:24,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 14:19:24,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:19:24,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-27 14:19:24,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:24,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:19:24,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-27 14:19:24,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 14:19:24,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:19:25,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:25,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:25,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:25,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:25,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:25,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:25,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:19:25,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:25,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:25,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:25,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:25,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:25,040 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-10-27 14:19:25,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797356453] [2020-10-27 14:19:25,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:25,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:19:25,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393519539] [2020-10-27 14:19:25,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:19:25,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:25,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:19:25,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:19:25,043 INFO L87 Difference]: Start difference. First operand 91 states and 99 transitions. Second operand 8 states. [2020-10-27 14:19:25,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:25,340 INFO L93 Difference]: Finished difference Result 185 states and 206 transitions. [2020-10-27 14:19:25,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 14:19:25,341 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 85 [2020-10-27 14:19:25,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:25,343 INFO L225 Difference]: With dead ends: 185 [2020-10-27 14:19:25,343 INFO L226 Difference]: Without dead ends: 112 [2020-10-27 14:19:25,344 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 14:19:25,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-27 14:19:25,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 105. [2020-10-27 14:19:25,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-27 14:19:25,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 113 transitions. [2020-10-27 14:19:25,354 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 113 transitions. Word has length 85 [2020-10-27 14:19:25,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:25,355 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 113 transitions. [2020-10-27 14:19:25,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:19:25,355 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 113 transitions. [2020-10-27 14:19:25,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 14:19:25,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:25,357 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:25,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:19:25,358 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:25,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:25,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1405401236, now seen corresponding path program 5 times [2020-10-27 14:19:25,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:25,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787362600] [2020-10-27 14:19:25,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:25,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:25,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:25,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:25,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:25,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:25,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:25,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:30,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:30,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 14:19:30,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:19:30,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 14:19:30,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:30,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:19:30,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-27 14:19:30,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:19:30,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:19:30,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:30,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:30,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:30,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:30,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:30,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:30,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:19:30,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:30,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:30,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:30,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:30,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:30,533 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-10-27 14:19:30,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787362600] [2020-10-27 14:19:30,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:30,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:19:30,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769830344] [2020-10-27 14:19:30,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:19:30,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:30,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:19:30,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:19:30,538 INFO L87 Difference]: Start difference. First operand 105 states and 113 transitions. Second operand 9 states. [2020-10-27 14:19:30,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:30,891 INFO L93 Difference]: Finished difference Result 211 states and 232 transitions. [2020-10-27 14:19:30,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:19:30,892 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 99 [2020-10-27 14:19:30,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:30,893 INFO L225 Difference]: With dead ends: 211 [2020-10-27 14:19:30,893 INFO L226 Difference]: Without dead ends: 126 [2020-10-27 14:19:30,896 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 14:19:30,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-27 14:19:30,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 119. [2020-10-27 14:19:30,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-27 14:19:30,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 127 transitions. [2020-10-27 14:19:30,914 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 127 transitions. Word has length 99 [2020-10-27 14:19:30,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:30,914 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 127 transitions. [2020-10-27 14:19:30,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:19:30,914 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 127 transitions. [2020-10-27 14:19:30,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-27 14:19:30,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:30,919 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:30,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:19:30,919 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:30,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:30,926 INFO L82 PathProgramCache]: Analyzing trace with hash -234906842, now seen corresponding path program 6 times [2020-10-27 14:19:30,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:30,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186704764] [2020-10-27 14:19:30,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:30,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:30,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:30,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:31,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:31,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:31,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:31,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:36,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:36,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-27 14:19:36,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:19:36,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5094 [2020-10-27 14:19:36,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:36,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:19:36,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-27 14:19:36,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:19:36,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:36,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:36,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:36,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:36,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:36,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:36,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:36,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:19:36,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:36,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:36,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:36,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:36,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:36,222 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-10-27 14:19:36,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186704764] [2020-10-27 14:19:36,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:36,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:19:36,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210735493] [2020-10-27 14:19:36,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:19:36,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:36,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:19:36,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:19:36,225 INFO L87 Difference]: Start difference. First operand 119 states and 127 transitions. Second operand 10 states. [2020-10-27 14:19:36,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:36,636 INFO L93 Difference]: Finished difference Result 237 states and 258 transitions. [2020-10-27 14:19:36,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:19:36,636 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 113 [2020-10-27 14:19:36,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:36,638 INFO L225 Difference]: With dead ends: 237 [2020-10-27 14:19:36,638 INFO L226 Difference]: Without dead ends: 140 [2020-10-27 14:19:36,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:19:36,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-27 14:19:36,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 133. [2020-10-27 14:19:36,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-27 14:19:36,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 141 transitions. [2020-10-27 14:19:36,655 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 141 transitions. Word has length 113 [2020-10-27 14:19:36,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:36,655 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 141 transitions. [2020-10-27 14:19:36,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:19:36,656 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 141 transitions. [2020-10-27 14:19:36,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-27 14:19:36,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:36,660 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:36,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:19:36,660 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:36,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:36,661 INFO L82 PathProgramCache]: Analyzing trace with hash -530704840, now seen corresponding path program 7 times [2020-10-27 14:19:36,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:36,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141403256] [2020-10-27 14:19:36,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:36,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:36,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:36,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:36,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:36,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:36,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:41,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:41,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-27 14:19:41,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:19:41,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-27 14:19:41,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:41,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:19:41,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-27 14:19:41,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 14:19:41,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:41,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:41,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:41,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:41,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:41,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:41,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:41,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:19:41,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:41,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:41,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:41,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:41,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:41,887 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2020-10-27 14:19:41,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141403256] [2020-10-27 14:19:41,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:41,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:19:41,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765262457] [2020-10-27 14:19:41,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:19:41,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:41,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:19:41,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:19:41,890 INFO L87 Difference]: Start difference. First operand 133 states and 141 transitions. Second operand 11 states. [2020-10-27 14:19:42,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:42,565 INFO L93 Difference]: Finished difference Result 263 states and 284 transitions. [2020-10-27 14:19:42,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:19:42,566 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 127 [2020-10-27 14:19:42,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:42,568 INFO L225 Difference]: With dead ends: 263 [2020-10-27 14:19:42,568 INFO L226 Difference]: Without dead ends: 154 [2020-10-27 14:19:42,569 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 14:19:42,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-27 14:19:42,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 147. [2020-10-27 14:19:42,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-27 14:19:42,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 155 transitions. [2020-10-27 14:19:42,595 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 155 transitions. Word has length 127 [2020-10-27 14:19:42,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:42,596 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 155 transitions. [2020-10-27 14:19:42,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:19:42,596 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 155 transitions. [2020-10-27 14:19:42,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-27 14:19:42,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:42,600 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 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, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:42,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:19:42,600 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:42,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:42,604 INFO L82 PathProgramCache]: Analyzing trace with hash 360401354, now seen corresponding path program 8 times [2020-10-27 14:19:42,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:42,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675077577] [2020-10-27 14:19:42,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:42,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:42,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:42,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:42,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:42,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:42,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:47,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:47,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-27 14:19:47,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:19:47,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5062 [2020-10-27 14:19:47,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:47,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:19:47,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-27 14:19:47,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:19:47,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:47,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:47,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:47,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:47,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:47,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:47,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:47,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:19:47,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:47,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:47,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:47,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:47,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:47,866 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2020-10-27 14:19:47,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675077577] [2020-10-27 14:19:47,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:47,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:19:47,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579832278] [2020-10-27 14:19:47,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:19:47,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:47,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:19:47,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:19:47,869 INFO L87 Difference]: Start difference. First operand 147 states and 155 transitions. Second operand 12 states. [2020-10-27 14:19:48,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:48,390 INFO L93 Difference]: Finished difference Result 289 states and 310 transitions. [2020-10-27 14:19:48,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:19:48,390 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 141 [2020-10-27 14:19:48,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:48,392 INFO L225 Difference]: With dead ends: 289 [2020-10-27 14:19:48,392 INFO L226 Difference]: Without dead ends: 168 [2020-10-27 14:19:48,393 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 14:19:48,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-27 14:19:48,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 161. [2020-10-27 14:19:48,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-27 14:19:48,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 169 transitions. [2020-10-27 14:19:48,401 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 169 transitions. Word has length 141 [2020-10-27 14:19:48,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:48,402 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 169 transitions. [2020-10-27 14:19:48,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:19:48,402 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 169 transitions. [2020-10-27 14:19:48,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-27 14:19:48,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:48,404 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 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, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:48,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:19:48,404 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:48,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:48,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1576687068, now seen corresponding path program 9 times [2020-10-27 14:19:48,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:48,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876299623] [2020-10-27 14:19:48,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:48,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:48,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:48,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:48,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:48,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:48,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:53,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:53,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-27 14:19:53,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:19:53,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5064 [2020-10-27 14:19:53,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:53,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:19:53,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-27 14:19:53,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:19:53,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:53,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:53,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:53,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:53,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:53,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:53,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:53,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:19:53,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:53,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:53,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:53,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:53,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:53,743 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2020-10-27 14:19:53,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876299623] [2020-10-27 14:19:53,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:53,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:19:53,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642252380] [2020-10-27 14:19:53,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:19:53,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:53,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:19:53,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:19:53,746 INFO L87 Difference]: Start difference. First operand 161 states and 169 transitions. Second operand 13 states. [2020-10-27 14:19:54,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:54,372 INFO L93 Difference]: Finished difference Result 315 states and 336 transitions. [2020-10-27 14:19:54,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:19:54,373 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 155 [2020-10-27 14:19:54,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:54,375 INFO L225 Difference]: With dead ends: 315 [2020-10-27 14:19:54,375 INFO L226 Difference]: Without dead ends: 182 [2020-10-27 14:19:54,379 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 14:19:54,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-27 14:19:54,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 175. [2020-10-27 14:19:54,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-27 14:19:54,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 183 transitions. [2020-10-27 14:19:54,388 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 183 transitions. Word has length 155 [2020-10-27 14:19:54,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:54,388 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 183 transitions. [2020-10-27 14:19:54,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:19:54,389 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 183 transitions. [2020-10-27 14:19:54,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-27 14:19:54,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:54,391 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 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, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:54,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:19:54,392 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:54,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:54,392 INFO L82 PathProgramCache]: Analyzing trace with hash 780556910, now seen corresponding path program 10 times [2020-10-27 14:19:54,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:54,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832146782] [2020-10-27 14:19:54,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:54,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:54,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:54,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:54,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:54,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:54,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:59,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:59,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-27 14:19:59,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:19:59,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 14:19:59,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:59,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:19:59,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-27 14:19:59,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:19:59,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:59,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:59,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:59,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:59,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:59,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:59,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:59,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:19:59,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:59,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:59,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:59,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:59,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:59,642 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2020-10-27 14:19:59,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832146782] [2020-10-27 14:19:59,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:59,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:19:59,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605403947] [2020-10-27 14:19:59,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:19:59,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:59,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:19:59,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:19:59,644 INFO L87 Difference]: Start difference. First operand 175 states and 183 transitions. Second operand 14 states. [2020-10-27 14:20:00,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:00,319 INFO L93 Difference]: Finished difference Result 341 states and 362 transitions. [2020-10-27 14:20:00,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:20:00,319 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 169 [2020-10-27 14:20:00,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:00,321 INFO L225 Difference]: With dead ends: 341 [2020-10-27 14:20:00,321 INFO L226 Difference]: Without dead ends: 196 [2020-10-27 14:20:00,322 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 14:20:00,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-27 14:20:00,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 189. [2020-10-27 14:20:00,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-27 14:20:00,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 197 transitions. [2020-10-27 14:20:00,331 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 197 transitions. Word has length 169 [2020-10-27 14:20:00,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:00,331 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 197 transitions. [2020-10-27 14:20:00,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:20:00,331 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 197 transitions. [2020-10-27 14:20:00,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-10-27 14:20:00,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:00,334 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 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, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:00,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:20:00,334 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:00,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:00,335 INFO L82 PathProgramCache]: Analyzing trace with hash -170756224, now seen corresponding path program 11 times [2020-10-27 14:20:00,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:00,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621566727] [2020-10-27 14:20:00,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:00,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:00,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:00,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:00,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:00,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:00,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:05,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:05,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-27 14:20:05,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:20:05,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5199 [2020-10-27 14:20:05,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:05,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:20:05,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-27 14:20:05,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 14:20:05,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:05,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:05,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:05,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:05,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:05,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:05,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:05,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:20:05,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:05,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:05,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:05,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:05,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:05,810 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2020-10-27 14:20:05,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621566727] [2020-10-27 14:20:05,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:05,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:20:05,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513273391] [2020-10-27 14:20:05,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:20:05,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:05,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:20:05,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:20:05,814 INFO L87 Difference]: Start difference. First operand 189 states and 197 transitions. Second operand 15 states. [2020-10-27 14:20:06,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:06,466 INFO L93 Difference]: Finished difference Result 367 states and 388 transitions. [2020-10-27 14:20:06,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:20:06,466 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 183 [2020-10-27 14:20:06,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:06,468 INFO L225 Difference]: With dead ends: 367 [2020-10-27 14:20:06,469 INFO L226 Difference]: Without dead ends: 210 [2020-10-27 14:20:06,469 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 14:20:06,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-27 14:20:06,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 203. [2020-10-27 14:20:06,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-27 14:20:06,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 211 transitions. [2020-10-27 14:20:06,479 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 211 transitions. Word has length 183 [2020-10-27 14:20:06,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:06,479 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 211 transitions. [2020-10-27 14:20:06,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:20:06,480 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 211 transitions. [2020-10-27 14:20:06,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-27 14:20:06,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:06,482 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 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, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:06,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:20:06,483 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:06,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:06,483 INFO L82 PathProgramCache]: Analyzing trace with hash -291910382, now seen corresponding path program 12 times [2020-10-27 14:20:06,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:06,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943568007] [2020-10-27 14:20:06,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:06,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:06,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:06,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:06,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:06,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:06,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:11,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:11,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 207 [2020-10-27 14:20:11,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:20:11,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5109 [2020-10-27 14:20:11,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:11,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:20:11,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-27 14:20:11,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:20:11,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:11,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:11,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:11,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:11,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:11,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:11,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:11,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:11,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:11,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:11,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:11,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:11,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:11,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 864 trivial. 0 not checked. [2020-10-27 14:20:11,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943568007] [2020-10-27 14:20:11,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:11,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:20:11,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942266079] [2020-10-27 14:20:11,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:20:11,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:11,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:20:11,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:20:11,882 INFO L87 Difference]: Start difference. First operand 203 states and 211 transitions. Second operand 16 states. [2020-10-27 14:20:12,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:12,542 INFO L93 Difference]: Finished difference Result 393 states and 414 transitions. [2020-10-27 14:20:12,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:20:12,543 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 197 [2020-10-27 14:20:12,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:12,546 INFO L225 Difference]: With dead ends: 393 [2020-10-27 14:20:12,546 INFO L226 Difference]: Without dead ends: 224 [2020-10-27 14:20:12,547 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 14:20:12,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-27 14:20:12,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 217. [2020-10-27 14:20:12,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-27 14:20:12,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 225 transitions. [2020-10-27 14:20:12,556 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 225 transitions. Word has length 197 [2020-10-27 14:20:12,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:12,556 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 225 transitions. [2020-10-27 14:20:12,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:20:12,556 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 225 transitions. [2020-10-27 14:20:12,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-27 14:20:12,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:12,559 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 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, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:12,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:20:12,559 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:12,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:12,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1906277156, now seen corresponding path program 13 times [2020-10-27 14:20:12,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:12,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138435213] [2020-10-27 14:20:12,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:12,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:12,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:12,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:12,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:12,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:12,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:17,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:17,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 221 [2020-10-27 14:20:17,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:20:17,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-27 14:20:17,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:17,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:20:17,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 14:20:17,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 14:20:17,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:17,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:17,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:17,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:17,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:17,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:17,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:17,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:17,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:17,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:17,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:17,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:17,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1183 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1014 trivial. 0 not checked. [2020-10-27 14:20:17,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138435213] [2020-10-27 14:20:17,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:17,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:20:17,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125874599] [2020-10-27 14:20:17,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:20:17,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:17,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:20:17,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:20:17,886 INFO L87 Difference]: Start difference. First operand 217 states and 225 transitions. Second operand 17 states. [2020-10-27 14:20:18,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:18,596 INFO L93 Difference]: Finished difference Result 419 states and 440 transitions. [2020-10-27 14:20:18,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:20:18,597 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 211 [2020-10-27 14:20:18,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:18,599 INFO L225 Difference]: With dead ends: 419 [2020-10-27 14:20:18,599 INFO L226 Difference]: Without dead ends: 238 [2020-10-27 14:20:18,600 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 14:20:18,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-27 14:20:18,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 231. [2020-10-27 14:20:18,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-10-27 14:20:18,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 239 transitions. [2020-10-27 14:20:18,611 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 239 transitions. Word has length 211 [2020-10-27 14:20:18,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:18,611 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 239 transitions. [2020-10-27 14:20:18,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:20:18,611 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 239 transitions. [2020-10-27 14:20:18,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-10-27 14:20:18,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:18,615 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 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, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:18,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:20:18,615 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:18,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:18,616 INFO L82 PathProgramCache]: Analyzing trace with hash -944856650, now seen corresponding path program 14 times [2020-10-27 14:20:18,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:18,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134363470] [2020-10-27 14:20:18,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:18,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:18,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:18,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:18,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:18,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:18,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:23,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:23,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-10-27 14:20:23,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:20:23,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5119 [2020-10-27 14:20:23,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:23,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:20:23,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 103 [2020-10-27 14:20:23,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 14:20:23,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:24,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:24,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:24,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:24,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:24,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:24,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:24,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:24,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:24,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:24,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:24,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:24,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:24,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1372 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2020-10-27 14:20:24,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134363470] [2020-10-27 14:20:24,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:24,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:20:24,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732518402] [2020-10-27 14:20:24,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:20:24,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:24,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:20:24,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:20:24,062 INFO L87 Difference]: Start difference. First operand 231 states and 239 transitions. Second operand 18 states. [2020-10-27 14:20:24,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:24,775 INFO L93 Difference]: Finished difference Result 445 states and 466 transitions. [2020-10-27 14:20:24,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:20:24,776 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 225 [2020-10-27 14:20:24,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:24,778 INFO L225 Difference]: With dead ends: 445 [2020-10-27 14:20:24,778 INFO L226 Difference]: Without dead ends: 252 [2020-10-27 14:20:24,779 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 14:20:24,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-27 14:20:24,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 245. [2020-10-27 14:20:24,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-10-27 14:20:24,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 253 transitions. [2020-10-27 14:20:24,792 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 253 transitions. Word has length 225 [2020-10-27 14:20:24,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:24,792 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 253 transitions. [2020-10-27 14:20:24,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:20:24,792 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 253 transitions. [2020-10-27 14:20:24,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-10-27 14:20:24,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:24,795 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 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, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:24,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:20:24,795 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:24,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:24,796 INFO L82 PathProgramCache]: Analyzing trace with hash 2073714888, now seen corresponding path program 15 times [2020-10-27 14:20:24,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:24,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926323672] [2020-10-27 14:20:24,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:24,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:24,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:24,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:24,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:24,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:25,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:30,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:30,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 249 [2020-10-27 14:20:30,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:20:30,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5279 [2020-10-27 14:20:30,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:30,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:20:30,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 109 [2020-10-27 14:20:30,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:20:30,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:30,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:30,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:30,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:30,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:30,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:30,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:30,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:30,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:30,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:30,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:30,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:30,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:30,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1575 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1350 trivial. 0 not checked. [2020-10-27 14:20:30,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926323672] [2020-10-27 14:20:30,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:30,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:20:30,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835254076] [2020-10-27 14:20:30,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:20:30,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:30,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:20:30,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:20:30,434 INFO L87 Difference]: Start difference. First operand 245 states and 253 transitions. Second operand 19 states. [2020-10-27 14:20:31,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:31,223 INFO L93 Difference]: Finished difference Result 471 states and 492 transitions. [2020-10-27 14:20:31,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:20:31,224 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 239 [2020-10-27 14:20:31,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:31,226 INFO L225 Difference]: With dead ends: 471 [2020-10-27 14:20:31,226 INFO L226 Difference]: Without dead ends: 266 [2020-10-27 14:20:31,227 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 14:20:31,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-27 14:20:31,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 259. [2020-10-27 14:20:31,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-27 14:20:31,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 267 transitions. [2020-10-27 14:20:31,239 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 267 transitions. Word has length 239 [2020-10-27 14:20:31,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:31,240 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 267 transitions. [2020-10-27 14:20:31,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:20:31,240 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 267 transitions. [2020-10-27 14:20:31,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-27 14:20:31,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:31,242 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 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, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:31,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:20:31,242 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:31,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:31,243 INFO L82 PathProgramCache]: Analyzing trace with hash 742250586, now seen corresponding path program 16 times [2020-10-27 14:20:31,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:31,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125690014] [2020-10-27 14:20:31,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:31,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:31,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:31,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:31,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:31,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:31,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:36,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:36,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 263 [2020-10-27 14:20:36,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:20:36,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5315 [2020-10-27 14:20:36,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:36,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:20:36,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 115 [2020-10-27 14:20:36,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 14:20:36,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:36,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:36,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:36,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:36,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:36,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:36,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:36,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:36,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:36,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:36,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:36,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:36,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:36,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1792 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1536 trivial. 0 not checked. [2020-10-27 14:20:36,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125690014] [2020-10-27 14:20:36,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:36,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:20:36,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510908774] [2020-10-27 14:20:36,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:20:36,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:36,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:20:36,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:20:36,937 INFO L87 Difference]: Start difference. First operand 259 states and 267 transitions. Second operand 20 states. [2020-10-27 14:20:37,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:37,808 INFO L93 Difference]: Finished difference Result 497 states and 518 transitions. [2020-10-27 14:20:37,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:20:37,809 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 253 [2020-10-27 14:20:37,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:37,810 INFO L225 Difference]: With dead ends: 497 [2020-10-27 14:20:37,811 INFO L226 Difference]: Without dead ends: 280 [2020-10-27 14:20:37,812 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 14:20:37,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-27 14:20:37,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 273. [2020-10-27 14:20:37,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-10-27 14:20:37,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 281 transitions. [2020-10-27 14:20:37,827 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 281 transitions. Word has length 253 [2020-10-27 14:20:37,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:37,828 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 281 transitions. [2020-10-27 14:20:37,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:20:37,828 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 281 transitions. [2020-10-27 14:20:37,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-10-27 14:20:37,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:37,830 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 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, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:37,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:20:37,830 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:37,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:37,831 INFO L82 PathProgramCache]: Analyzing trace with hash -562288532, now seen corresponding path program 17 times [2020-10-27 14:20:37,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:37,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368113333] [2020-10-27 14:20:37,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:37,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:37,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:37,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:37,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:38,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:38,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:42,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:42,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 277 [2020-10-27 14:20:42,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:20:42,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5103 [2020-10-27 14:20:42,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:42,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:20:42,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 121 [2020-10-27 14:20:42,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 14:20:42,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:43,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:43,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:43,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:43,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:43,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:43,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:43,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:43,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:43,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:43,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:43,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:43,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:43,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2023 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1734 trivial. 0 not checked. [2020-10-27 14:20:43,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368113333] [2020-10-27 14:20:43,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:43,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:20:43,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697882869] [2020-10-27 14:20:43,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:20:43,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:43,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:20:43,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:20:43,342 INFO L87 Difference]: Start difference. First operand 273 states and 281 transitions. Second operand 21 states. [2020-10-27 14:20:44,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:44,292 INFO L93 Difference]: Finished difference Result 523 states and 544 transitions. [2020-10-27 14:20:44,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:20:44,292 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 267 [2020-10-27 14:20:44,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:44,295 INFO L225 Difference]: With dead ends: 523 [2020-10-27 14:20:44,295 INFO L226 Difference]: Without dead ends: 294 [2020-10-27 14:20:44,297 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 14:20:44,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-27 14:20:44,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 287. [2020-10-27 14:20:44,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-10-27 14:20:44,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 295 transitions. [2020-10-27 14:20:44,309 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 295 transitions. Word has length 267 [2020-10-27 14:20:44,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:44,309 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 295 transitions. [2020-10-27 14:20:44,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:20:44,310 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 295 transitions. [2020-10-27 14:20:44,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-10-27 14:20:44,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:44,312 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 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, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:44,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:20:44,312 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:44,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:44,313 INFO L82 PathProgramCache]: Analyzing trace with hash -817860354, now seen corresponding path program 18 times [2020-10-27 14:20:44,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:44,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881050149] [2020-10-27 14:20:44,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:44,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:44,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:44,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:44,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:44,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:44,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:49,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:49,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 291 [2020-10-27 14:20:49,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:20:49,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:20:49,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:49,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:20:49,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 127 [2020-10-27 14:20:49,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 14:20:49,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:49,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:49,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:49,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:49,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:49,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:49,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:49,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:49,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:49,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:49,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:49,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:49,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:49,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2268 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1944 trivial. 0 not checked. [2020-10-27 14:20:49,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881050149] [2020-10-27 14:20:49,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:49,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:20:49,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370348318] [2020-10-27 14:20:49,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:20:49,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:49,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:20:49,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:20:49,773 INFO L87 Difference]: Start difference. First operand 287 states and 295 transitions. Second operand 22 states. [2020-10-27 14:20:50,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:50,637 INFO L93 Difference]: Finished difference Result 549 states and 570 transitions. [2020-10-27 14:20:50,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:20:50,638 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 281 [2020-10-27 14:20:50,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:50,640 INFO L225 Difference]: With dead ends: 549 [2020-10-27 14:20:50,640 INFO L226 Difference]: Without dead ends: 308 [2020-10-27 14:20:50,642 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 14:20:50,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-10-27 14:20:50,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 301. [2020-10-27 14:20:50,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-10-27 14:20:50,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 309 transitions. [2020-10-27 14:20:50,662 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 309 transitions. Word has length 281 [2020-10-27 14:20:50,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:50,662 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 309 transitions. [2020-10-27 14:20:50,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:20:50,663 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 309 transitions. [2020-10-27 14:20:50,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2020-10-27 14:20:50,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:50,666 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 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, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:50,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:20:50,666 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:50,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:50,667 INFO L82 PathProgramCache]: Analyzing trace with hash -981609968, now seen corresponding path program 19 times [2020-10-27 14:20:50,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:50,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817701053] [2020-10-27 14:20:50,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:50,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:50,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:50,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:50,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:50,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:51,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:55,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:55,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 305 [2020-10-27 14:20:55,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:20:55,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 14:20:55,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:55,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:20:55,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 133 [2020-10-27 14:20:55,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 14:20:55,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:56,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:56,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:56,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:56,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:56,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:56,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:56,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:56,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:56,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:56,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:56,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:56,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:56,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2527 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 2166 trivial. 0 not checked. [2020-10-27 14:20:56,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817701053] [2020-10-27 14:20:56,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:56,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:20:56,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573355102] [2020-10-27 14:20:56,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:20:56,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:56,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:20:56,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:20:56,171 INFO L87 Difference]: Start difference. First operand 301 states and 309 transitions. Second operand 23 states. [2020-10-27 14:20:57,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:57,126 INFO L93 Difference]: Finished difference Result 575 states and 596 transitions. [2020-10-27 14:20:57,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:20:57,127 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 295 [2020-10-27 14:20:57,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:57,129 INFO L225 Difference]: With dead ends: 575 [2020-10-27 14:20:57,129 INFO L226 Difference]: Without dead ends: 322 [2020-10-27 14:20:57,130 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 14:20:57,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-27 14:20:57,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 315. [2020-10-27 14:20:57,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-10-27 14:20:57,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 323 transitions. [2020-10-27 14:20:57,142 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 323 transitions. Word has length 295 [2020-10-27 14:20:57,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:57,142 INFO L481 AbstractCegarLoop]: Abstraction has 315 states and 323 transitions. [2020-10-27 14:20:57,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:20:57,142 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 323 transitions. [2020-10-27 14:20:57,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-10-27 14:20:57,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:57,145 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 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, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:57,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:20:57,145 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:57,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:57,146 INFO L82 PathProgramCache]: Analyzing trace with hash -466654302, now seen corresponding path program 20 times [2020-10-27 14:20:57,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:57,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575248350] [2020-10-27 14:20:57,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:57,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:57,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:57,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:57,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:57,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:57,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:02,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:02,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 319 [2020-10-27 14:21:02,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:21:02,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5105 [2020-10-27 14:21:02,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:02,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:21:02,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-10-27 14:21:02,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 14:21:02,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:02,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:02,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:02,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:02,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:02,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:02,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:02,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:21:02,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:02,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:02,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:02,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:02,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:02,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2800 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 2400 trivial. 0 not checked. [2020-10-27 14:21:02,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575248350] [2020-10-27 14:21:02,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:02,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 14:21:02,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583369277] [2020-10-27 14:21:02,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 14:21:02,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:02,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 14:21:02,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:21:02,939 INFO L87 Difference]: Start difference. First operand 315 states and 323 transitions. Second operand 24 states. [2020-10-27 14:21:04,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:04,021 INFO L93 Difference]: Finished difference Result 601 states and 622 transitions. [2020-10-27 14:21:04,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:21:04,022 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 309 [2020-10-27 14:21:04,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:04,024 INFO L225 Difference]: With dead ends: 601 [2020-10-27 14:21:04,024 INFO L226 Difference]: Without dead ends: 336 [2020-10-27 14:21:04,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:21:04,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-10-27 14:21:04,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 329. [2020-10-27 14:21:04,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2020-10-27 14:21:04,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 337 transitions. [2020-10-27 14:21:04,043 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 337 transitions. Word has length 309 [2020-10-27 14:21:04,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:04,043 INFO L481 AbstractCegarLoop]: Abstraction has 329 states and 337 transitions. [2020-10-27 14:21:04,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 14:21:04,044 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 337 transitions. [2020-10-27 14:21:04,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-27 14:21:04,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:04,046 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 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, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:04,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:21:04,047 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:04,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:04,047 INFO L82 PathProgramCache]: Analyzing trace with hash -61317708, now seen corresponding path program 21 times [2020-10-27 14:21:04,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:04,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68224141] [2020-10-27 14:21:04,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:04,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:04,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:04,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:04,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:04,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:04,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:09,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:09,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-10-27 14:21:09,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:21:09,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5198 [2020-10-27 14:21:09,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:09,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 14:21:09,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 145 [2020-10-27 14:21:09,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 14:21:09,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:09,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:09,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:09,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:09,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:09,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:09,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:09,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:21:09,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:09,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:09,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:09,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:09,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:09,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3087 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 2646 trivial. 0 not checked. [2020-10-27 14:21:09,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68224141] [2020-10-27 14:21:09,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:09,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:21:09,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767881376] [2020-10-27 14:21:09,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:21:09,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:09,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:21:09,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:21:09,995 INFO L87 Difference]: Start difference. First operand 329 states and 337 transitions. Second operand 25 states. [2020-10-27 14:21:10,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:10,942 INFO L93 Difference]: Finished difference Result 627 states and 648 transitions. [2020-10-27 14:21:10,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:21:10,943 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 323 [2020-10-27 14:21:10,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:10,946 INFO L225 Difference]: With dead ends: 627 [2020-10-27 14:21:10,946 INFO L226 Difference]: Without dead ends: 350 [2020-10-27 14:21:10,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:21:10,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-10-27 14:21:10,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 343. [2020-10-27 14:21:10,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-10-27 14:21:10,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 351 transitions. [2020-10-27 14:21:10,962 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 351 transitions. Word has length 323 [2020-10-27 14:21:10,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:10,962 INFO L481 AbstractCegarLoop]: Abstraction has 343 states and 351 transitions. [2020-10-27 14:21:10,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:21:10,963 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 351 transitions. [2020-10-27 14:21:10,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-10-27 14:21:10,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:10,965 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 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, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:10,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:21:10,966 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:10,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:10,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1594083398, now seen corresponding path program 22 times [2020-10-27 14:21:10,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:10,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008667506] [2020-10-27 14:21:10,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:10,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:10,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:11,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:11,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:11,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:11,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:16,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:16,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 347 [2020-10-27 14:21:16,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:21:16,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5419 [2020-10-27 14:21:16,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:16,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 14:21:16,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 151 [2020-10-27 14:21:16,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 14:21:16,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:16,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:16,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:16,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:16,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:16,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:16,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:16,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:21:16,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:16,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:16,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:16,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:16,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:17,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3388 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2904 trivial. 0 not checked. [2020-10-27 14:21:17,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008667506] [2020-10-27 14:21:17,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:17,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 14:21:17,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917079943] [2020-10-27 14:21:17,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 14:21:17,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:17,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 14:21:17,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:21:17,019 INFO L87 Difference]: Start difference. First operand 343 states and 351 transitions. Second operand 26 states. [2020-10-27 14:21:18,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:18,116 INFO L93 Difference]: Finished difference Result 653 states and 674 transitions. [2020-10-27 14:21:18,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:21:18,116 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 337 [2020-10-27 14:21:18,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:18,119 INFO L225 Difference]: With dead ends: 653 [2020-10-27 14:21:18,119 INFO L226 Difference]: Without dead ends: 364 [2020-10-27 14:21:18,120 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 14:21:18,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-10-27 14:21:18,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 357. [2020-10-27 14:21:18,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-10-27 14:21:18,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 365 transitions. [2020-10-27 14:21:18,132 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 365 transitions. Word has length 337 [2020-10-27 14:21:18,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:18,133 INFO L481 AbstractCegarLoop]: Abstraction has 357 states and 365 transitions. [2020-10-27 14:21:18,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 14:21:18,133 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 365 transitions. [2020-10-27 14:21:18,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-10-27 14:21:18,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:18,135 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 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, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:18,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:21:18,136 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:18,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:18,136 INFO L82 PathProgramCache]: Analyzing trace with hash 793037656, now seen corresponding path program 23 times [2020-10-27 14:21:18,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:18,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979903771] [2020-10-27 14:21:18,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:18,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:18,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:18,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:18,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:18,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:18,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:25,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:25,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 361 [2020-10-27 14:21:25,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:21:25,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6979 [2020-10-27 14:21:25,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:25,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:21:25,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 157 [2020-10-27 14:21:25,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 14:21:25,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:25,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:25,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:25,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:25,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:25,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:25,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:25,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:21:25,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:25,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:25,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:25,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:25,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:25,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3703 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 3174 trivial. 0 not checked. [2020-10-27 14:21:25,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979903771] [2020-10-27 14:21:25,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:25,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:21:25,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932760680] [2020-10-27 14:21:25,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:21:25,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:25,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:21:25,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:21:25,803 INFO L87 Difference]: Start difference. First operand 357 states and 365 transitions. Second operand 27 states. [2020-10-27 14:21:26,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:26,949 INFO L93 Difference]: Finished difference Result 679 states and 700 transitions. [2020-10-27 14:21:26,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:21:26,949 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 351 [2020-10-27 14:21:26,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:26,952 INFO L225 Difference]: With dead ends: 679 [2020-10-27 14:21:26,952 INFO L226 Difference]: Without dead ends: 378 [2020-10-27 14:21:26,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:21:26,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-10-27 14:21:26,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 371. [2020-10-27 14:21:26,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2020-10-27 14:21:26,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 379 transitions. [2020-10-27 14:21:26,966 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 379 transitions. Word has length 351 [2020-10-27 14:21:26,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:26,966 INFO L481 AbstractCegarLoop]: Abstraction has 371 states and 379 transitions. [2020-10-27 14:21:26,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:21:26,966 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 379 transitions. [2020-10-27 14:21:26,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2020-10-27 14:21:26,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:26,969 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 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, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:26,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:21:26,969 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:26,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:26,970 INFO L82 PathProgramCache]: Analyzing trace with hash 875988714, now seen corresponding path program 24 times [2020-10-27 14:21:26,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:26,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117613993] [2020-10-27 14:21:26,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:26,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:26,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:27,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:27,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:27,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:27,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:37,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:37,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 375 [2020-10-27 14:21:37,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:21:37,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10981 [2020-10-27 14:21:37,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:37,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 14:21:37,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 163 [2020-10-27 14:21:37,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 14:21:37,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:38,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:38,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:38,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:38,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:38,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:38,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:38,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:21:38,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:38,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:38,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:38,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:38,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:38,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3456 trivial. 0 not checked. [2020-10-27 14:21:38,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117613993] [2020-10-27 14:21:38,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:38,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 14:21:38,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198616280] [2020-10-27 14:21:38,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 14:21:38,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:38,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 14:21:38,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:21:38,666 INFO L87 Difference]: Start difference. First operand 371 states and 379 transitions. Second operand 28 states. [2020-10-27 14:21:39,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:39,903 INFO L93 Difference]: Finished difference Result 705 states and 726 transitions. [2020-10-27 14:21:39,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:21:39,904 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 365 [2020-10-27 14:21:39,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:39,908 INFO L225 Difference]: With dead ends: 705 [2020-10-27 14:21:39,908 INFO L226 Difference]: Without dead ends: 392 [2020-10-27 14:21:39,909 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 14:21:39,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2020-10-27 14:21:39,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 385. [2020-10-27 14:21:39,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-10-27 14:21:39,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 393 transitions. [2020-10-27 14:21:39,923 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 393 transitions. Word has length 365 [2020-10-27 14:21:39,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:39,923 INFO L481 AbstractCegarLoop]: Abstraction has 385 states and 393 transitions. [2020-10-27 14:21:39,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 14:21:39,924 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 393 transitions. [2020-10-27 14:21:39,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2020-10-27 14:21:39,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:39,927 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 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, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:39,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:21:39,927 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:39,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:39,928 INFO L82 PathProgramCache]: Analyzing trace with hash 721165052, now seen corresponding path program 25 times [2020-10-27 14:21:39,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:39,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893606300] [2020-10-27 14:21:39,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:39,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:39,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:40,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:40,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:40,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:40,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:47,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:47,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 389 [2020-10-27 14:21:47,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:21:47,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7531 [2020-10-27 14:21:47,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:47,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 14:21:47,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 169 [2020-10-27 14:21:47,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 14:21:47,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:48,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:48,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:48,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:48,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:48,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:48,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:48,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:21:48,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:48,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:48,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:48,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:48,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:48,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4375 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 3750 trivial. 0 not checked. [2020-10-27 14:21:48,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893606300] [2020-10-27 14:21:48,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:48,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 14:21:48,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248857454] [2020-10-27 14:21:48,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 14:21:48,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:48,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 14:21:48,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:21:48,219 INFO L87 Difference]: Start difference. First operand 385 states and 393 transitions. Second operand 29 states. [2020-10-27 14:21:49,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:49,437 INFO L93 Difference]: Finished difference Result 731 states and 752 transitions. [2020-10-27 14:21:49,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:21:49,438 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 379 [2020-10-27 14:21:49,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:49,441 INFO L225 Difference]: With dead ends: 731 [2020-10-27 14:21:49,441 INFO L226 Difference]: Without dead ends: 406 [2020-10-27 14:21:49,442 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 14:21:49,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2020-10-27 14:21:49,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 399. [2020-10-27 14:21:49,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2020-10-27 14:21:49,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 407 transitions. [2020-10-27 14:21:49,454 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 407 transitions. Word has length 379 [2020-10-27 14:21:49,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:49,455 INFO L481 AbstractCegarLoop]: Abstraction has 399 states and 407 transitions. [2020-10-27 14:21:49,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 14:21:49,455 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 407 transitions. [2020-10-27 14:21:49,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2020-10-27 14:21:49,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:49,458 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 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, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:49,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:21:49,458 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:49,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:49,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1732204658, now seen corresponding path program 26 times [2020-10-27 14:21:49,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:49,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396870968] [2020-10-27 14:21:49,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:49,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:49,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:49,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:49,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:49,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:49,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:55,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:55,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 403 [2020-10-27 14:21:55,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:21:55,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6438 [2020-10-27 14:21:55,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:55,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 14:21:55,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 175 [2020-10-27 14:21:55,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 14:21:55,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:56,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:56,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:56,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:56,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:56,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:56,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:56,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:21:56,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:56,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:56,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:56,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:56,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:56,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 4056 trivial. 0 not checked. [2020-10-27 14:21:56,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396870968] [2020-10-27 14:21:56,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:56,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 14:21:56,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109545353] [2020-10-27 14:21:56,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 14:21:56,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:56,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 14:21:56,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:21:56,672 INFO L87 Difference]: Start difference. First operand 399 states and 407 transitions. Second operand 30 states. [2020-10-27 14:21:57,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:57,870 INFO L93 Difference]: Finished difference Result 757 states and 778 transitions. [2020-10-27 14:21:57,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 14:21:57,871 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 393 [2020-10-27 14:21:57,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:57,874 INFO L225 Difference]: With dead ends: 757 [2020-10-27 14:21:57,875 INFO L226 Difference]: Without dead ends: 420 [2020-10-27 14:21:57,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:21:57,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2020-10-27 14:21:57,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 413. [2020-10-27 14:21:57,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 413 states. [2020-10-27 14:21:57,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 421 transitions. [2020-10-27 14:21:57,887 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 421 transitions. Word has length 393 [2020-10-27 14:21:57,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:57,888 INFO L481 AbstractCegarLoop]: Abstraction has 413 states and 421 transitions. [2020-10-27 14:21:57,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 14:21:57,888 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 421 transitions. [2020-10-27 14:21:57,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2020-10-27 14:21:57,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:57,891 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 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, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:57,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:21:57,891 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:57,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:57,892 INFO L82 PathProgramCache]: Analyzing trace with hash 481774752, now seen corresponding path program 27 times [2020-10-27 14:21:57,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:57,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023181206] [2020-10-27 14:21:57,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:57,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:57,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:57,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:58,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:58,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:58,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:06,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:06,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 417 [2020-10-27 14:22:06,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:22:06,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8870 [2020-10-27 14:22:06,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:06,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 14:22:06,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 181 [2020-10-27 14:22:06,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 14:22:06,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:07,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:07,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:07,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:07,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:07,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:07,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:07,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:22:07,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:07,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:07,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:07,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:07,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:07,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5103 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 4374 trivial. 0 not checked. [2020-10-27 14:22:07,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023181206] [2020-10-27 14:22:07,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:07,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 14:22:07,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183815173] [2020-10-27 14:22:07,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 14:22:07,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:07,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 14:22:07,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:22:07,610 INFO L87 Difference]: Start difference. First operand 413 states and 421 transitions. Second operand 31 states. [2020-10-27 14:22:09,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:09,114 INFO L93 Difference]: Finished difference Result 783 states and 804 transitions. [2020-10-27 14:22:09,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 14:22:09,115 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 407 [2020-10-27 14:22:09,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:09,118 INFO L225 Difference]: With dead ends: 783 [2020-10-27 14:22:09,118 INFO L226 Difference]: Without dead ends: 434 [2020-10-27 14:22:09,120 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 14:22:09,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-10-27 14:22:09,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 427. [2020-10-27 14:22:09,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2020-10-27 14:22:09,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 435 transitions. [2020-10-27 14:22:09,132 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 435 transitions. Word has length 407 [2020-10-27 14:22:09,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:09,132 INFO L481 AbstractCegarLoop]: Abstraction has 427 states and 435 transitions. [2020-10-27 14:22:09,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 14:22:09,132 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 435 transitions. [2020-10-27 14:22:09,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2020-10-27 14:22:09,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:09,135 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 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, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:09,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:22:09,136 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:09,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:09,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1109076530, now seen corresponding path program 28 times [2020-10-27 14:22:09,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:09,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960321588] [2020-10-27 14:22:09,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:09,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:09,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:09,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:09,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:09,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:14,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:14,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 431 [2020-10-27 14:22:14,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:22:14,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5289 [2020-10-27 14:22:14,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:14,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 14:22:14,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 187 [2020-10-27 14:22:14,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 14:22:14,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:15,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:15,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:15,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:15,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:15,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:15,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:15,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:22:15,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:15,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:15,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:15,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:15,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:15,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5488 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 4704 trivial. 0 not checked. [2020-10-27 14:22:15,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960321588] [2020-10-27 14:22:15,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:15,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 14:22:15,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130014554] [2020-10-27 14:22:15,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 14:22:15,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:15,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 14:22:15,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:22:15,312 INFO L87 Difference]: Start difference. First operand 427 states and 435 transitions. Second operand 32 states. [2020-10-27 14:22:16,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:16,783 INFO L93 Difference]: Finished difference Result 809 states and 830 transitions. [2020-10-27 14:22:16,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:22:16,784 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 421 [2020-10-27 14:22:16,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:16,787 INFO L225 Difference]: With dead ends: 809 [2020-10-27 14:22:16,787 INFO L226 Difference]: Without dead ends: 448 [2020-10-27 14:22:16,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:22:16,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2020-10-27 14:22:16,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 441. [2020-10-27 14:22:16,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2020-10-27 14:22:16,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 449 transitions. [2020-10-27 14:22:16,799 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 449 transitions. Word has length 421 [2020-10-27 14:22:16,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:16,800 INFO L481 AbstractCegarLoop]: Abstraction has 441 states and 449 transitions. [2020-10-27 14:22:16,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 14:22:16,800 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 449 transitions. [2020-10-27 14:22:16,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2020-10-27 14:22:16,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:16,803 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 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, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:16,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:22:16,803 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:16,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:16,804 INFO L82 PathProgramCache]: Analyzing trace with hash -768647100, now seen corresponding path program 29 times [2020-10-27 14:22:16,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:16,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202974395] [2020-10-27 14:22:16,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:16,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:16,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:16,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:17,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:17,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:17,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:22,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:22,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 445 [2020-10-27 14:22:22,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:22:22,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5571 [2020-10-27 14:22:22,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:22,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 14:22:22,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 193 [2020-10-27 14:22:22,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 14:22:22,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:23,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:23,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:23,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:23,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:23,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:23,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:23,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:22:23,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:23,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:23,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:23,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:23,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:23,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5887 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 5046 trivial. 0 not checked. [2020-10-27 14:22:23,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202974395] [2020-10-27 14:22:23,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:23,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 14:22:23,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450549619] [2020-10-27 14:22:23,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 14:22:23,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:23,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 14:22:23,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:22:23,340 INFO L87 Difference]: Start difference. First operand 441 states and 449 transitions. Second operand 33 states. [2020-10-27 14:22:24,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:24,856 INFO L93 Difference]: Finished difference Result 835 states and 856 transitions. [2020-10-27 14:22:24,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 14:22:24,857 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 435 [2020-10-27 14:22:24,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:24,860 INFO L225 Difference]: With dead ends: 835 [2020-10-27 14:22:24,860 INFO L226 Difference]: Without dead ends: 462 [2020-10-27 14:22:24,862 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 14:22:24,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2020-10-27 14:22:24,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 455. [2020-10-27 14:22:24,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 455 states. [2020-10-27 14:22:24,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 463 transitions. [2020-10-27 14:22:24,874 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 463 transitions. Word has length 435 [2020-10-27 14:22:24,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:24,874 INFO L481 AbstractCegarLoop]: Abstraction has 455 states and 463 transitions. [2020-10-27 14:22:24,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 14:22:24,874 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 463 transitions. [2020-10-27 14:22:24,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-10-27 14:22:24,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:24,878 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 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, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:24,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 14:22:24,878 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:24,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:24,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1505816874, now seen corresponding path program 30 times [2020-10-27 14:22:24,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:24,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414446510] [2020-10-27 14:22:24,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:24,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:24,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:24,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:25,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:25,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:25,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:31,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:31,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 459 [2020-10-27 14:22:31,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:22:31,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6923 [2020-10-27 14:22:31,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:31,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 14:22:31,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 199 [2020-10-27 14:22:31,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 14:22:31,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:32,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:32,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:32,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:32,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:32,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:32,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:32,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:22:32,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:32,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:32,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:32,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:32,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:32,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6300 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 5400 trivial. 0 not checked. [2020-10-27 14:22:32,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414446510] [2020-10-27 14:22:32,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:32,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 14:22:32,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812973732] [2020-10-27 14:22:32,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 14:22:32,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:32,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 14:22:32,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:22:32,779 INFO L87 Difference]: Start difference. First operand 455 states and 463 transitions. Second operand 34 states. [2020-10-27 14:22:34,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:34,193 INFO L93 Difference]: Finished difference Result 861 states and 882 transitions. [2020-10-27 14:22:34,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 14:22:34,194 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 449 [2020-10-27 14:22:34,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:34,197 INFO L225 Difference]: With dead ends: 861 [2020-10-27 14:22:34,197 INFO L226 Difference]: Without dead ends: 476 [2020-10-27 14:22:34,198 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 14:22:34,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2020-10-27 14:22:34,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 469. [2020-10-27 14:22:34,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2020-10-27 14:22:34,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 477 transitions. [2020-10-27 14:22:34,210 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 477 transitions. Word has length 449 [2020-10-27 14:22:34,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:34,211 INFO L481 AbstractCegarLoop]: Abstraction has 469 states and 477 transitions. [2020-10-27 14:22:34,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 14:22:34,211 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 477 transitions. [2020-10-27 14:22:34,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2020-10-27 14:22:34,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:34,215 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 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, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:34,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 14:22:34,215 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:34,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:34,215 INFO L82 PathProgramCache]: Analyzing trace with hash -107129368, now seen corresponding path program 31 times [2020-10-27 14:22:34,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:34,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199499688] [2020-10-27 14:22:34,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:34,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:34,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:34,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:34,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:34,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:34,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:39,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:39,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 473 [2020-10-27 14:22:39,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:22:39,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5530 [2020-10-27 14:22:39,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:39,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 14:22:39,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 205 [2020-10-27 14:22:39,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 14:22:39,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0