/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_copyInitSum_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 03:38:15,289 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 03:38:15,293 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 03:38:15,336 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 03:38:15,337 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 03:38:15,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 03:38:15,340 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 03:38:15,343 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 03:38:15,345 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 03:38:15,346 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 03:38:15,348 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 03:38:15,349 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 03:38:15,350 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 03:38:15,351 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 03:38:15,353 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 03:38:15,354 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 03:38:15,355 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 03:38:15,356 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 03:38:15,359 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 03:38:15,361 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 03:38:15,363 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 03:38:15,365 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 03:38:15,366 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 03:38:15,367 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 03:38:15,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 03:38:15,371 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 03:38:15,372 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 03:38:15,373 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 03:38:15,374 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 03:38:15,375 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 03:38:15,375 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 03:38:15,376 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 03:38:15,377 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 03:38:15,378 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 03:38:15,380 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 03:38:15,380 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 03:38:15,381 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 03:38:15,381 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 03:38:15,382 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 03:38:15,383 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 03:38:15,384 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 03:38:15,393 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 03:38:15,432 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 03:38:15,433 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 03:38:15,434 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 03:38:15,434 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 03:38:15,435 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 03:38:15,435 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 03:38:15,435 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 03:38:15,435 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 03:38:15,435 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 03:38:15,436 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 03:38:15,436 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 03:38:15,436 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 03:38:15,436 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 03:38:15,436 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 03:38:15,437 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 03:38:15,437 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 03:38:15,437 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 03:38:15,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 03:38:15,437 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 03:38:15,438 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 03:38:15,438 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 03:38:15,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 03:38:15,438 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 03:38:15,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 03:38:15,439 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 03:38:15,439 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 03:38:15,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 03:38:15,439 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 03:38:15,439 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 03:38:15,440 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 03:38:15,841 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 03:38:15,875 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 03:38:15,879 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 03:38:15,881 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 03:38:15,881 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 03:38:15,882 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copyInitSum_ground.i [2020-10-29 03:38:15,972 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9b80ba8ed/8945e28800a5487a817f06a53814e101/FLAG5442d86e5 [2020-10-29 03:38:16,642 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 03:38:16,643 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copyInitSum_ground.i [2020-10-29 03:38:16,651 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9b80ba8ed/8945e28800a5487a817f06a53814e101/FLAG5442d86e5 [2020-10-29 03:38:17,003 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9b80ba8ed/8945e28800a5487a817f06a53814e101 [2020-10-29 03:38:17,006 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 03:38:17,013 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 03:38:17,017 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 03:38:17,017 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 03:38:17,021 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 03:38:17,022 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:38:17" (1/1) ... [2020-10-29 03:38:17,029 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c6f9025 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:38:17, skipping insertion in model container [2020-10-29 03:38:17,029 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:38:17" (1/1) ... [2020-10-29 03:38:17,038 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 03:38:17,062 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 03:38:17,244 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 03:38:17,260 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 03:38:17,303 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 03:38:17,328 INFO L208 MainTranslator]: Completed translation [2020-10-29 03:38:17,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:38:17 WrapperNode [2020-10-29 03:38:17,329 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 03:38:17,330 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 03:38:17,331 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 03:38:17,331 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 03:38:17,347 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:38:17" (1/1) ... [2020-10-29 03:38:17,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:38:17" (1/1) ... [2020-10-29 03:38:17,364 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:38:17" (1/1) ... [2020-10-29 03:38:17,364 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:38:17" (1/1) ... [2020-10-29 03:38:17,388 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:38:17" (1/1) ... [2020-10-29 03:38:17,397 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:38:17" (1/1) ... [2020-10-29 03:38:17,405 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:38:17" (1/1) ... [2020-10-29 03:38:17,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 03:38:17,412 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 03:38:17,413 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 03:38:17,413 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 03:38:17,414 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:38:17" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 03:38:17,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 03:38:17,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 03:38:17,526 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 03:38:17,526 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 03:38:17,527 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 03:38:17,527 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 03:38:17,527 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 03:38:17,527 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 03:38:17,528 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 03:38:17,528 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 03:38:17,529 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 03:38:17,530 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 03:38:17,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 03:38:17,530 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 03:38:17,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 03:38:17,531 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 03:38:17,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 03:38:17,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 03:38:17,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 03:38:17,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 03:38:17,941 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 03:38:17,941 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-29 03:38:17,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:38:17 BoogieIcfgContainer [2020-10-29 03:38:17,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 03:38:17,946 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 03:38:17,946 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 03:38:17,954 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 03:38:17,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 03:38:17" (1/3) ... [2020-10-29 03:38:17,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d56146b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 03:38:17, skipping insertion in model container [2020-10-29 03:38:17,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:38:17" (2/3) ... [2020-10-29 03:38:17,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d56146b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 03:38:17, skipping insertion in model container [2020-10-29 03:38:17,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:38:17" (3/3) ... [2020-10-29 03:38:17,963 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum_ground.i [2020-10-29 03:38:17,991 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 03:38:17,996 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 03:38:18,011 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 03:38:18,043 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 03:38:18,043 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 03:38:18,043 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 03:38:18,044 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 03:38:18,044 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 03:38:18,044 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 03:38:18,044 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 03:38:18,045 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 03:38:18,082 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-10-29 03:38:18,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-29 03:38:18,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:38:18,090 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:38:18,090 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:38:18,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:38:18,098 INFO L82 PathProgramCache]: Analyzing trace with hash -925662558, now seen corresponding path program 1 times [2020-10-29 03:38:18,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:38:18,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238659919] [2020-10-29 03:38:18,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:38:18,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:38:18,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:18,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:18,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:18,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:38:18,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-29 03:38:18,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:38:18,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 437 [2020-10-29 03:38:18,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:38:18,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:38:18,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:38:18,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:38:18,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 03:38:18,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 03:38:18,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:38:18,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:38:18,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:18,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:38:18,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:38:18,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:38:18,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 03:38:18,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:38:18,868 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:38:18,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:38:18,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:38:18,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:38:18,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:38:18,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:38:18,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238659919] [2020-10-29 03:38:18,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 03:38:18,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 03:38:18,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96991988] [2020-10-29 03:38:18,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 03:38:18,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:38:18,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 03:38:18,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 03:38:18,908 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 4 states. [2020-10-29 03:38:19,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:38:19,065 INFO L93 Difference]: Finished difference Result 63 states and 87 transitions. [2020-10-29 03:38:19,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 03:38:19,068 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-29 03:38:19,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:38:19,076 INFO L225 Difference]: With dead ends: 63 [2020-10-29 03:38:19,076 INFO L226 Difference]: Without dead ends: 31 [2020-10-29 03:38:19,080 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 [2020-10-29 03:38:19,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-29 03:38:19,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-29 03:38:19,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-29 03:38:19,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-29 03:38:19,125 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 19 [2020-10-29 03:38:19,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:38:19,125 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-29 03:38:19,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 03:38:19,126 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-29 03:38:19,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 03:38:19,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:38:19,127 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] [2020-10-29 03:38:19,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 03:38:19,128 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:38:19,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:38:19,129 INFO L82 PathProgramCache]: Analyzing trace with hash 504393060, now seen corresponding path program 1 times [2020-10-29 03:38:19,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:38:19,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968774386] [2020-10-29 03:38:19,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:38:19,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:38:19,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:19,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:19,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:19,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:20,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:38:20,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 03:38:20,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:38:20,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1812 [2020-10-29 03:38:20,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:38:20,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:38:20,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 03:38:20,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:38:20,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 03:38:20,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:38:21,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:38:21,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:38:21,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:21,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:38:21,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:38:21,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:38:21,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:38:21,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:38:21,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:38:21,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:38:21,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:38:21,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:38:21,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:38:21,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:38:21,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968774386] [2020-10-29 03:38:21,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:38:21,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 03:38:21,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553480913] [2020-10-29 03:38:21,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 03:38:21,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:38:21,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 03:38:21,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-29 03:38:21,459 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 13 states. [2020-10-29 03:38:21,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:38:21,912 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2020-10-29 03:38:21,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 03:38:21,913 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-10-29 03:38:21,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:38:21,916 INFO L225 Difference]: With dead ends: 49 [2020-10-29 03:38:21,916 INFO L226 Difference]: Without dead ends: 45 [2020-10-29 03:38:21,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:38:21,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-29 03:38:21,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2020-10-29 03:38:21,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-29 03:38:21,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-29 03:38:21,932 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 24 [2020-10-29 03:38:21,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:38:21,933 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-29 03:38:21,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 03:38:21,933 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-29 03:38:21,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 03:38:21,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:38:21,934 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:38:21,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 03:38:21,935 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:38:21,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:38:21,936 INFO L82 PathProgramCache]: Analyzing trace with hash 393942690, now seen corresponding path program 2 times [2020-10-29 03:38:21,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:38:21,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850661551] [2020-10-29 03:38:21,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:38:21,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:38:21,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:21,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:21,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:22,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:23,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:24,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:38:24,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 03:38:24,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 03:38:24,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2107 [2020-10-29 03:38:24,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:38:24,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:38:24,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 03:38:24,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:38:24,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 03:38:24,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:38:24,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:38:24,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:38:24,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:24,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:38:24,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:38:24,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:38:24,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:38:24,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:38:24,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:38:24,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:38:24,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:38:24,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:38:24,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:38:24,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:38:24,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850661551] [2020-10-29 03:38:24,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:38:24,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 03:38:24,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181262117] [2020-10-29 03:38:24,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 03:38:24,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:38:24,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 03:38:24,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-29 03:38:24,545 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 15 states. [2020-10-29 03:38:25,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:38:25,183 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2020-10-29 03:38:25,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 03:38:25,184 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2020-10-29 03:38:25,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:38:25,187 INFO L225 Difference]: With dead ends: 58 [2020-10-29 03:38:25,187 INFO L226 Difference]: Without dead ends: 54 [2020-10-29 03:38:25,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2020-10-29 03:38:25,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-29 03:38:25,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 40. [2020-10-29 03:38:25,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-29 03:38:25,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-10-29 03:38:25,199 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 26 [2020-10-29 03:38:25,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:38:25,199 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-10-29 03:38:25,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 03:38:25,200 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-10-29 03:38:25,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 03:38:25,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:38:25,201 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:38:25,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 03:38:25,202 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:38:25,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:38:25,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1625319520, now seen corresponding path program 3 times [2020-10-29 03:38:25,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:38:25,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845717885] [2020-10-29 03:38:25,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:38:25,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:38:25,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:25,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:25,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:25,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:25,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:26,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:28,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:38:28,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 03:38:28,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:38:28,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3102 [2020-10-29 03:38:28,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:38:28,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:38:28,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 03:38:28,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:38:28,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 03:38:28,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 03:38:28,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:38:28,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:38:28,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:28,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:38:28,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:38:28,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:38:28,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:38:28,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:38:28,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:38:28,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:38:28,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:38:28,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:38:28,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 03:38:29,002 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:38:29,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845717885] [2020-10-29 03:38:29,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:38:29,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 03:38:29,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419954209] [2020-10-29 03:38:29,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 03:38:29,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:38:29,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 03:38:29,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:38:29,007 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 16 states. [2020-10-29 03:38:29,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:38:29,794 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-10-29 03:38:29,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 03:38:29,795 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 28 [2020-10-29 03:38:29,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:38:29,799 INFO L225 Difference]: With dead ends: 53 [2020-10-29 03:38:29,799 INFO L226 Difference]: Without dead ends: 49 [2020-10-29 03:38:29,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2020-10-29 03:38:29,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-29 03:38:29,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2020-10-29 03:38:29,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-29 03:38:29,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-10-29 03:38:29,822 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 28 [2020-10-29 03:38:29,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:38:29,824 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-10-29 03:38:29,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 03:38:29,824 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-10-29 03:38:29,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 03:38:29,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:38:29,825 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:38:29,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 03:38:29,828 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:38:29,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:38:29,829 INFO L82 PathProgramCache]: Analyzing trace with hash 241743422, now seen corresponding path program 1 times [2020-10-29 03:38:29,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:38:29,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505548468] [2020-10-29 03:38:29,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:38:29,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:38:29,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:29,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:29,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:30,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:38:30,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 03:38:30,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:38:30,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 573 [2020-10-29 03:38:30,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:38:30,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:38:30,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 03:38:30,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 03:38:30,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-29 03:38:30,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:38:30,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:38:30,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:38:30,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:30,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:38:30,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:38:30,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:38:30,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:38:30,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:38:30,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:38:30,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:38:30,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:38:30,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:38:30,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:38:30,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-29 03:38:30,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:38:30,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:30,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:38:30,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:38:30,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:38:30,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:38:30,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:38:30,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:38:30,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:38:30,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:38:30,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:38:30,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:38:30,481 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 03:38:30,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505548468] [2020-10-29 03:38:30,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:38:30,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 03:38:30,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014035166] [2020-10-29 03:38:30,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 03:38:30,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:38:30,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 03:38:30,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 03:38:30,484 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 5 states. [2020-10-29 03:38:30,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:38:30,583 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2020-10-29 03:38:30,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 03:38:30,583 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2020-10-29 03:38:30,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:38:30,584 INFO L225 Difference]: With dead ends: 69 [2020-10-29 03:38:30,585 INFO L226 Difference]: Without dead ends: 42 [2020-10-29 03:38:30,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 03:38:30,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-29 03:38:30,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-10-29 03:38:30,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-29 03:38:30,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-10-29 03:38:30,595 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 32 [2020-10-29 03:38:30,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:38:30,595 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-10-29 03:38:30,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 03:38:30,595 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-10-29 03:38:30,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 03:38:30,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:38:30,597 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:38:30,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 03:38:30,597 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:38:30,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:38:30,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1344999512, now seen corresponding path program 2 times [2020-10-29 03:38:30,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:38:30,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523436407] [2020-10-29 03:38:30,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:38:30,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:38:30,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:30,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:30,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:30,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:31,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:34,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:38:34,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 03:38:34,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 03:38:34,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3637 [2020-10-29 03:38:34,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:38:34,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:38:34,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 03:38:34,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:38:34,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 03:38:34,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:38:35,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:38:35,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:38:35,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:35,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:38:35,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:38:35,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:38:35,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:38:35,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:38:35,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:38:35,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:38:35,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:38:35,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:38:35,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:38:35,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-29 03:38:35,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:38:35,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:35,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:38:35,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:38:35,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:38:35,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:38:35,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:38:35,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:38:35,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:38:35,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:38:35,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:38:35,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:38:35,244 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:38:35,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523436407] [2020-10-29 03:38:35,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:38:35,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 03:38:35,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133505646] [2020-10-29 03:38:35,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 03:38:35,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:38:35,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 03:38:35,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-10-29 03:38:35,247 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 19 states. [2020-10-29 03:38:37,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:38:37,166 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2020-10-29 03:38:37,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 03:38:37,167 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2020-10-29 03:38:37,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:38:37,168 INFO L225 Difference]: With dead ends: 64 [2020-10-29 03:38:37,168 INFO L226 Difference]: Without dead ends: 60 [2020-10-29 03:38:37,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 03:38:37,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-29 03:38:37,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2020-10-29 03:38:37,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-29 03:38:37,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2020-10-29 03:38:37,184 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 37 [2020-10-29 03:38:37,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:38:37,184 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2020-10-29 03:38:37,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 03:38:37,185 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2020-10-29 03:38:37,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 03:38:37,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:38:37,187 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-29 03:38:37,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 03:38:37,187 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:38:37,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:38:37,188 INFO L82 PathProgramCache]: Analyzing trace with hash 183552102, now seen corresponding path program 3 times [2020-10-29 03:38:37,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:38:37,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988005058] [2020-10-29 03:38:37,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:38:37,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:38:37,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:37,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:37,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:37,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:38,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:39,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:42,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:38:42,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 03:38:42,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:38:42,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 03:38:42,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:38:42,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:38:42,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 03:38:42,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:38:42,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 03:38:42,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:38:43,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:38:43,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:38:43,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:43,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:38:43,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:38:43,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:38:43,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:38:43,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:38:43,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:38:43,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:38:43,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:38:43,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:38:43,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:38:43,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-29 03:38:43,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:38:43,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:43,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:38:43,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:38:43,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:38:43,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:38:43,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:38:43,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:38:43,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:38:43,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:38:43,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:38:43,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:38:43,508 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:38:43,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988005058] [2020-10-29 03:38:43,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:38:43,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 03:38:43,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201724951] [2020-10-29 03:38:43,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 03:38:43,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:38:43,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 03:38:43,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2020-10-29 03:38:43,512 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 21 states. [2020-10-29 03:38:45,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:38:45,590 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2020-10-29 03:38:45,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 03:38:45,591 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 39 [2020-10-29 03:38:45,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:38:45,593 INFO L225 Difference]: With dead ends: 77 [2020-10-29 03:38:45,593 INFO L226 Difference]: Without dead ends: 73 [2020-10-29 03:38:45,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2020-10-29 03:38:45,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-29 03:38:45,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 55. [2020-10-29 03:38:45,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-29 03:38:45,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2020-10-29 03:38:45,609 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 39 [2020-10-29 03:38:45,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:38:45,609 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2020-10-29 03:38:45,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 03:38:45,610 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2020-10-29 03:38:45,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 03:38:45,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:38:45,611 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-29 03:38:45,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 03:38:45,611 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:38:45,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:38:45,612 INFO L82 PathProgramCache]: Analyzing trace with hash 242837924, now seen corresponding path program 4 times [2020-10-29 03:38:45,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:38:45,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301516488] [2020-10-29 03:38:45,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:38:45,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:38:45,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:45,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:45,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:46,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:47,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:48,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:49,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:50,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:38:50,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 03:38:50,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 03:38:50,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 03:38:50,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:38:50,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:38:50,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 03:38:50,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:38:50,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 03:38:50,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:38:51,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:38:51,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:38:51,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:51,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:38:51,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:38:51,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:38:51,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:38:51,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:38:51,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:38:51,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:38:51,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:38:51,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:38:51,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:38:51,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-29 03:38:51,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:38:51,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:51,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:38:51,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:38:51,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:38:51,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:38:51,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:38:51,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:38:51,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:38:51,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:38:51,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:38:51,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:38:51,412 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:38:51,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301516488] [2020-10-29 03:38:51,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:38:51,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 03:38:51,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549959136] [2020-10-29 03:38:51,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 03:38:51,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:38:51,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 03:38:51,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:38:51,415 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 20 states. [2020-10-29 03:38:52,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:38:52,463 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2020-10-29 03:38:52,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 03:38:52,465 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2020-10-29 03:38:52,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:38:52,467 INFO L225 Difference]: With dead ends: 70 [2020-10-29 03:38:52,467 INFO L226 Difference]: Without dead ends: 66 [2020-10-29 03:38:52,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2020-10-29 03:38:52,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-29 03:38:52,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2020-10-29 03:38:52,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-29 03:38:52,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-10-29 03:38:52,495 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 41 [2020-10-29 03:38:52,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:38:52,503 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-10-29 03:38:52,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 03:38:52,503 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-10-29 03:38:52,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 03:38:52,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:38:52,505 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-10-29 03:38:52,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 03:38:52,505 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:38:52,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:38:52,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1095191422, now seen corresponding path program 5 times [2020-10-29 03:38:52,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:38:52,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795975583] [2020-10-29 03:38:52,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:38:52,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:38:52,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:52,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:52,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:54,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:38:54,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 03:38:54,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:38:54,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1495 [2020-10-29 03:38:54,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:38:54,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:38:54,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 03:38:54,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 03:38:54,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:38:54,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:38:54,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:38:54,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:38:54,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:54,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:38:54,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:38:54,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:38:54,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:38:54,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:38:54,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:38:54,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:38:54,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:38:54,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:38:54,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:38:54,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-29 03:38:54,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:38:54,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:54,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:38:54,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:38:54,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:38:54,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:38:54,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:38:54,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:38:54,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:38:54,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:38:54,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:38:54,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:38:54,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-29 03:38:54,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:38:54,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:54,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:38:54,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:38:54,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:38:54,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:38:54,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:38:54,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:38:54,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:38:54,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:38:54,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:38:54,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:38:54,120 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-29 03:38:54,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795975583] [2020-10-29 03:38:54,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:38:54,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 03:38:54,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951547530] [2020-10-29 03:38:54,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 03:38:54,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:38:54,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 03:38:54,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-29 03:38:54,130 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 6 states. [2020-10-29 03:38:54,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:38:54,255 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2020-10-29 03:38:54,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 03:38:54,256 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-10-29 03:38:54,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:38:54,257 INFO L225 Difference]: With dead ends: 94 [2020-10-29 03:38:54,257 INFO L226 Difference]: Without dead ends: 55 [2020-10-29 03:38:54,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-29 03:38:54,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-29 03:38:54,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2020-10-29 03:38:54,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-29 03:38:54,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-10-29 03:38:54,284 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 45 [2020-10-29 03:38:54,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:38:54,288 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-10-29 03:38:54,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 03:38:54,288 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-10-29 03:38:54,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-29 03:38:54,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:38:54,289 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:38:54,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 03:38:54,290 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:38:54,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:38:54,292 INFO L82 PathProgramCache]: Analyzing trace with hash 281322320, now seen corresponding path program 6 times [2020-10-29 03:38:54,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:38:54,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524519733] [2020-10-29 03:38:54,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:38:54,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:38:54,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:54,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:54,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:56,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:56,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:38:59,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:38:59,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 03:38:59,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 03:38:59,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 03:38:59,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:38:59,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:38:59,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-29 03:38:59,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:38:59,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 03:38:59,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:39:00,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:39:00,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:39:00,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:00,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:39:00,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:39:00,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:39:00,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:39:00,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:39:00,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:39:00,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:39:00,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:39:00,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:39:00,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:39:00,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-29 03:39:00,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:39:00,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:00,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:39:00,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:39:00,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:39:00,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:39:00,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:39:00,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:39:00,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:39:00,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:39:00,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:39:00,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:39:00,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-29 03:39:00,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:39:00,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:00,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:39:00,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:39:00,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:39:00,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 03:39:00,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:39:00,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:39:00,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:39:00,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:39:00,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:39:00,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:39:00,929 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 03:39:00,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524519733] [2020-10-29 03:39:00,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:39:00,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 03:39:00,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42014611] [2020-10-29 03:39:00,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 03:39:00,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:39:00,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 03:39:00,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2020-10-29 03:39:00,933 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 24 states. [2020-10-29 03:39:03,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:39:03,342 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2020-10-29 03:39:03,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 03:39:03,344 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 50 [2020-10-29 03:39:03,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:39:03,345 INFO L225 Difference]: With dead ends: 81 [2020-10-29 03:39:03,345 INFO L226 Difference]: Without dead ends: 77 [2020-10-29 03:39:03,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=161, Invalid=1561, Unknown=0, NotChecked=0, Total=1722 [2020-10-29 03:39:03,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-29 03:39:03,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2020-10-29 03:39:03,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-29 03:39:03,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2020-10-29 03:39:03,365 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 50 [2020-10-29 03:39:03,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:39:03,369 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2020-10-29 03:39:03,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-29 03:39:03,370 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2020-10-29 03:39:03,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 03:39:03,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:39:03,371 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:39:03,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 03:39:03,371 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:39:03,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:39:03,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1777180018, now seen corresponding path program 7 times [2020-10-29 03:39:03,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:39:03,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795919893] [2020-10-29 03:39:03,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:39:03,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:39:03,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:03,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:03,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:05,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:05,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:06,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:07,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:07,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:08,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:39:08,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 03:39:08,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 03:39:08,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 03:39:08,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:39:08,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:39:08,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-29 03:39:08,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:39:08,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 03:39:08,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:39:10,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:39:10,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:39:10,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:10,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:39:10,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:39:10,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:39:10,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:39:10,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:39:10,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:39:10,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:39:10,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:39:10,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:39:10,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:39:10,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-29 03:39:10,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:39:10,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:10,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:39:10,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:39:10,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:39:10,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 03:39:10,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:39:10,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:39:10,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:39:10,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:39:10,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:39:10,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:39:10,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-29 03:39:10,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:39:10,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:10,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:39:10,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:39:10,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:39:10,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:39:10,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:39:10,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:39:10,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:39:10,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:39:10,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:39:10,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:39:10,311 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 03:39:10,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795919893] [2020-10-29 03:39:10,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:39:10,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-29 03:39:10,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319963930] [2020-10-29 03:39:10,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-29 03:39:10,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:39:10,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-29 03:39:10,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2020-10-29 03:39:10,315 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 25 states. [2020-10-29 03:39:13,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:39:13,952 INFO L93 Difference]: Finished difference Result 150 states and 170 transitions. [2020-10-29 03:39:13,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-29 03:39:13,953 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 52 [2020-10-29 03:39:13,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:39:13,955 INFO L225 Difference]: With dead ends: 150 [2020-10-29 03:39:13,955 INFO L226 Difference]: Without dead ends: 146 [2020-10-29 03:39:13,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=479, Invalid=2943, Unknown=0, NotChecked=0, Total=3422 [2020-10-29 03:39:13,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-29 03:39:13,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 89. [2020-10-29 03:39:13,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-29 03:39:13,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 98 transitions. [2020-10-29 03:39:13,983 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 98 transitions. Word has length 52 [2020-10-29 03:39:13,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:39:13,984 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 98 transitions. [2020-10-29 03:39:13,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-29 03:39:13,984 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 98 transitions. [2020-10-29 03:39:13,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 03:39:13,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:39:13,985 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:39:13,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 03:39:13,986 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:39:13,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:39:13,986 INFO L82 PathProgramCache]: Analyzing trace with hash -462468406, now seen corresponding path program 8 times [2020-10-29 03:39:13,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:39:13,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760393499] [2020-10-29 03:39:13,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:39:13,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:39:14,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:14,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:14,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:16,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:17,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:18,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:18,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:19,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:39:19,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 03:39:19,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 03:39:19,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-29 03:39:19,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:39:19,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:39:19,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-29 03:39:19,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:39:19,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 03:39:19,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:39:20,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:39:20,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:39:20,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:20,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:39:20,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:39:20,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:39:20,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:39:20,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:39:20,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:39:20,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:39:20,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:39:20,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:39:20,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:39:20,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-29 03:39:20,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:39:20,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:20,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:39:20,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:39:20,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:39:20,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:39:20,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:39:20,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:39:20,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:39:20,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:39:20,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:39:20,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:39:20,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-29 03:39:20,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:39:20,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:20,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:39:20,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:39:20,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:39:20,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:39:20,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:39:20,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:39:20,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:39:20,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:39:20,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:39:20,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:39:20,342 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 03:39:20,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760393499] [2020-10-29 03:39:20,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:39:20,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-29 03:39:20,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585078784] [2020-10-29 03:39:20,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-29 03:39:20,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:39:20,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-29 03:39:20,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2020-10-29 03:39:20,345 INFO L87 Difference]: Start difference. First operand 89 states and 98 transitions. Second operand 26 states. [2020-10-29 03:39:23,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:39:23,442 INFO L93 Difference]: Finished difference Result 140 states and 157 transitions. [2020-10-29 03:39:23,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-29 03:39:23,443 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 56 [2020-10-29 03:39:23,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:39:23,445 INFO L225 Difference]: With dead ends: 140 [2020-10-29 03:39:23,445 INFO L226 Difference]: Without dead ends: 136 [2020-10-29 03:39:23,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=417, Invalid=2235, Unknown=0, NotChecked=0, Total=2652 [2020-10-29 03:39:23,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-29 03:39:23,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 91. [2020-10-29 03:39:23,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-29 03:39:23,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2020-10-29 03:39:23,470 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 56 [2020-10-29 03:39:23,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:39:23,471 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2020-10-29 03:39:23,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-29 03:39:23,471 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2020-10-29 03:39:23,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 03:39:23,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:39:23,473 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2020-10-29 03:39:23,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 03:39:23,473 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:39:23,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:39:23,474 INFO L82 PathProgramCache]: Analyzing trace with hash -416399318, now seen corresponding path program 9 times [2020-10-29 03:39:23,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:39:23,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920255259] [2020-10-29 03:39:23,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:39:23,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:39:23,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:23,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:23,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:26,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:39:26,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 03:39:26,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:39:26,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3192 [2020-10-29 03:39:26,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:39:26,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:39:26,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 03:39:26,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-29 03:39:26,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 03:39:26,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:39:26,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:39:26,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:39:26,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:26,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:39:26,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:39:26,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:39:26,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:39:26,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:39:26,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:39:26,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:39:26,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:39:26,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:39:26,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:39:26,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-29 03:39:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:39:26,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:26,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:39:26,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:39:26,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:39:26,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:39:26,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:39:26,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:39:26,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:39:26,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:39:26,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:39:26,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:39:26,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-29 03:39:26,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:39:26,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:26,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:39:26,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:39:26,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:39:26,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:39:26,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:39:26,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:39:26,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:39:26,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:39:26,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:39:26,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:39:26,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-29 03:39:26,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:39:26,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:26,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:39:26,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:39:26,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:39:26,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:39:26,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:39:26,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:39:26,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:39:26,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:39:26,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:39:26,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:39:26,755 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-29 03:39:26,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920255259] [2020-10-29 03:39:26,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:39:26,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 03:39:26,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095806928] [2020-10-29 03:39:26,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 03:39:26,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:39:26,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 03:39:26,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-29 03:39:26,758 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand 7 states. [2020-10-29 03:39:26,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:39:26,923 INFO L93 Difference]: Finished difference Result 159 states and 178 transitions. [2020-10-29 03:39:26,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 03:39:26,924 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 58 [2020-10-29 03:39:26,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:39:26,925 INFO L225 Difference]: With dead ends: 159 [2020-10-29 03:39:26,925 INFO L226 Difference]: Without dead ends: 78 [2020-10-29 03:39:26,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-29 03:39:26,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-29 03:39:26,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-29 03:39:26,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-29 03:39:26,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 84 transitions. [2020-10-29 03:39:26,947 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 84 transitions. Word has length 58 [2020-10-29 03:39:26,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:39:26,947 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 84 transitions. [2020-10-29 03:39:26,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 03:39:26,947 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 84 transitions. [2020-10-29 03:39:26,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 03:39:26,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:39:26,949 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:39:26,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 03:39:26,949 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:39:26,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:39:26,950 INFO L82 PathProgramCache]: Analyzing trace with hash 548706102, now seen corresponding path program 10 times [2020-10-29 03:39:26,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:39:26,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130477613] [2020-10-29 03:39:26,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:39:26,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:39:26,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:26,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:27,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:31,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:39:31,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 03:39:31,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:39:31,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 03:39:31,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:39:31,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:39:31,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 03:39:31,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 03:39:31,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 03:39:31,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:39:32,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:39:32,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:39:32,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:32,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:39:32,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:39:32,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:39:32,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:39:32,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:39:32,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:39:32,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:39:32,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:39:32,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:39:32,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:39:32,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-29 03:39:32,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:39:32,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:32,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:39:32,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:39:32,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:39:32,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:39:32,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:39:32,058 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:39:32,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:39:32,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:39:32,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:39:32,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:39:32,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-29 03:39:32,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:39:32,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:32,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:39:32,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:39:32,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:39:32,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:39:32,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:39:32,063 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:39:32,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:39:32,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:39:32,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:39:32,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:39:32,068 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-10-29 03:39:32,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130477613] [2020-10-29 03:39:32,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:39:32,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 03:39:32,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977072225] [2020-10-29 03:39:32,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 03:39:32,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:39:32,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 03:39:32,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-29 03:39:32,070 INFO L87 Difference]: Start difference. First operand 77 states and 84 transitions. Second operand 8 states. [2020-10-29 03:39:32,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:39:32,230 INFO L93 Difference]: Finished difference Result 147 states and 162 transitions. [2020-10-29 03:39:32,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 03:39:32,231 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-10-29 03:39:32,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:39:32,232 INFO L225 Difference]: With dead ends: 147 [2020-10-29 03:39:32,232 INFO L226 Difference]: Without dead ends: 81 [2020-10-29 03:39:32,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-29 03:39:32,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-29 03:39:32,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-29 03:39:32,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-29 03:39:32,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2020-10-29 03:39:32,251 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 59 [2020-10-29 03:39:32,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:39:32,251 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2020-10-29 03:39:32,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 03:39:32,251 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2020-10-29 03:39:32,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-29 03:39:32,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:39:32,252 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:39:32,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 03:39:32,253 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:39:32,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:39:32,253 INFO L82 PathProgramCache]: Analyzing trace with hash 189573830, now seen corresponding path program 11 times [2020-10-29 03:39:32,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:39:32,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851259591] [2020-10-29 03:39:32,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:39:32,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:39:32,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:32,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:32,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:37,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:39:37,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 03:39:37,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:39:37,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 03:39:37,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:39:37,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:39:37,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 03:39:37,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 03:39:37,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 03:39:37,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:39:37,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:39:37,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:39:37,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:37,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:39:37,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:39:37,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:39:37,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:39:37,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:39:37,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:39:37,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:39:37,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:39:37,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:39:37,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:39:37,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-29 03:39:37,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:39:37,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:37,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:39:37,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:39:37,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:39:37,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:39:37,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:39:37,363 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:39:37,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:39:37,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:39:37,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:39:37,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:39:37,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-29 03:39:37,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:39:37,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:37,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:39:37,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:39:37,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:39:37,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:39:37,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:39:37,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:39:37,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:39:37,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:39:37,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:39:37,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:39:37,373 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-29 03:39:37,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851259591] [2020-10-29 03:39:37,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:39:37,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 03:39:37,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530489679] [2020-10-29 03:39:37,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 03:39:37,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:39:37,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 03:39:37,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-29 03:39:37,375 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand 9 states. [2020-10-29 03:39:37,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:39:37,612 INFO L93 Difference]: Finished difference Result 138 states and 149 transitions. [2020-10-29 03:39:37,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 03:39:37,613 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 62 [2020-10-29 03:39:37,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:39:37,614 INFO L225 Difference]: With dead ends: 138 [2020-10-29 03:39:37,614 INFO L226 Difference]: Without dead ends: 70 [2020-10-29 03:39:37,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-29 03:39:37,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-29 03:39:37,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2020-10-29 03:39:37,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-29 03:39:37,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2020-10-29 03:39:37,645 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 62 [2020-10-29 03:39:37,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:39:37,645 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2020-10-29 03:39:37,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 03:39:37,645 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2020-10-29 03:39:37,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-29 03:39:37,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:39:37,646 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:39:37,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 03:39:37,646 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:39:37,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:39:37,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1681461774, now seen corresponding path program 12 times [2020-10-29 03:39:37,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:39:37,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840678469] [2020-10-29 03:39:37,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:39:37,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:39:37,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:37,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:37,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:42,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:39:42,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 03:39:42,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:39:42,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 03:39:42,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:39:42,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:39:42,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 03:39:42,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 03:39:42,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 03:39:42,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:39:42,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:39:42,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:39:42,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:42,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:39:42,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:39:42,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:39:42,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:39:42,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:39:42,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:39:42,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:39:42,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:39:42,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:39:42,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:39:42,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-29 03:39:42,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:39:42,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:42,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:39:42,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:39:42,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:39:42,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 03:39:42,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:39:42,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:39:42,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:39:42,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:39:42,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:39:42,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:39:42,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-29 03:39:42,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:39:42,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:42,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:39:42,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:39:42,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:39:42,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:39:42,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:39:42,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:39:42,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:39:42,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:39:42,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:39:42,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:39:42,850 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-10-29 03:39:42,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840678469] [2020-10-29 03:39:42,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:39:42,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 03:39:42,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063539576] [2020-10-29 03:39:42,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 03:39:42,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:39:42,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 03:39:42,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-29 03:39:42,854 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand 10 states. [2020-10-29 03:39:43,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:39:43,120 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2020-10-29 03:39:43,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 03:39:43,123 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 65 [2020-10-29 03:39:43,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:39:43,124 INFO L225 Difference]: With dead ends: 130 [2020-10-29 03:39:43,124 INFO L226 Difference]: Without dead ends: 75 [2020-10-29 03:39:43,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-29 03:39:43,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-29 03:39:43,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-10-29 03:39:43,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-29 03:39:43,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2020-10-29 03:39:43,153 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 65 [2020-10-29 03:39:43,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:39:43,153 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2020-10-29 03:39:43,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 03:39:43,153 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2020-10-29 03:39:43,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 03:39:43,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:39:43,163 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:39:43,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 03:39:43,163 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:39:43,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:39:43,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1948227648, now seen corresponding path program 13 times [2020-10-29 03:39:43,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:39:43,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783391969] [2020-10-29 03:39:43,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:39:43,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:39:43,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:43,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:43,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:48,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:39:48,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-29 03:39:48,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:39:48,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-29 03:39:48,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:39:48,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:39:48,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 03:39:48,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-29 03:39:48,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 03:39:48,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:39:48,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:39:48,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:39:48,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:48,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:39:48,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:39:48,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:39:48,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:39:48,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:39:48,341 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:39:48,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:39:48,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:39:48,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:39:48,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:39:48,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-29 03:39:48,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:39:48,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:48,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:39:48,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:39:48,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:39:48,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 03:39:48,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:39:48,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:39:48,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:39:48,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:39:48,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:39:48,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:39:48,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-29 03:39:48,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:39:48,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:48,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:39:48,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:39:48,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:39:48,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:39:48,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:39:48,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:39:48,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:39:48,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:39:48,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:39:48,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:39:48,366 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2020-10-29 03:39:48,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783391969] [2020-10-29 03:39:48,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:39:48,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 03:39:48,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650437006] [2020-10-29 03:39:48,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 03:39:48,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:39:48,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 03:39:48,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-29 03:39:48,369 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand 11 states. [2020-10-29 03:39:48,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:39:48,554 INFO L93 Difference]: Finished difference Result 139 states and 147 transitions. [2020-10-29 03:39:48,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 03:39:48,555 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 70 [2020-10-29 03:39:48,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:39:48,556 INFO L225 Difference]: With dead ends: 139 [2020-10-29 03:39:48,556 INFO L226 Difference]: Without dead ends: 80 [2020-10-29 03:39:48,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-29 03:39:48,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-29 03:39:48,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2020-10-29 03:39:48,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-29 03:39:48,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2020-10-29 03:39:48,576 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 70 [2020-10-29 03:39:48,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:39:48,576 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2020-10-29 03:39:48,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 03:39:48,576 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2020-10-29 03:39:48,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 03:39:48,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:39:48,577 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:39:48,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 03:39:48,579 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:39:48,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:39:48,579 INFO L82 PathProgramCache]: Analyzing trace with hash 558407338, now seen corresponding path program 14 times [2020-10-29 03:39:48,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:39:48,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867654065] [2020-10-29 03:39:48,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:39:48,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:39:48,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:48,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:48,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:53,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:39:53,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-29 03:39:53,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:39:53,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 03:39:53,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:39:53,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:39:53,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 03:39:53,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-29 03:39:53,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 03:39:53,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:39:53,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:39:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:39:53,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:53,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:39:53,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:39:53,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:39:53,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:39:53,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:39:53,729 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:39:53,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:39:53,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:39:53,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:39:53,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:39:53,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-29 03:39:53,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:39:53,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:53,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:39:53,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:39:53,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:39:53,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:39:53,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:39:53,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:39:53,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:39:53,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:39:53,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:39:53,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:39:53,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-29 03:39:53,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:39:53,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:53,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:39:53,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:39:53,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:39:53,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:39:53,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:39:53,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:39:53,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:39:53,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:39:53,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:39:53,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:39:53,744 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 4 proven. 64 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-10-29 03:39:53,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867654065] [2020-10-29 03:39:53,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:39:53,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 03:39:53,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217373990] [2020-10-29 03:39:53,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 03:39:53,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:39:53,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 03:39:53,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-29 03:39:53,746 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand 12 states. [2020-10-29 03:39:53,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:39:53,933 INFO L93 Difference]: Finished difference Result 148 states and 156 transitions. [2020-10-29 03:39:53,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 03:39:53,934 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2020-10-29 03:39:53,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:39:53,934 INFO L225 Difference]: With dead ends: 148 [2020-10-29 03:39:53,935 INFO L226 Difference]: Without dead ends: 85 [2020-10-29 03:39:53,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-29 03:39:53,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-29 03:39:53,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2020-10-29 03:39:53,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-29 03:39:53,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2020-10-29 03:39:53,955 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 75 [2020-10-29 03:39:53,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:39:53,955 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2020-10-29 03:39:53,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 03:39:53,955 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2020-10-29 03:39:53,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-29 03:39:53,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:39:53,956 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:39:53,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 03:39:53,957 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:39:53,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:39:53,957 INFO L82 PathProgramCache]: Analyzing trace with hash 536808952, now seen corresponding path program 15 times [2020-10-29 03:39:53,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:39:53,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221097101] [2020-10-29 03:39:53,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:39:53,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:39:53,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:54,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:54,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:58,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:39:58,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 03:39:58,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:39:58,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 03:39:58,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:39:58,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:39:58,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 03:39:58,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-29 03:39:58,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 03:39:58,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:39:59,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:39:59,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:39:59,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:59,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:39:59,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:39:59,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:39:59,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:39:59,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:39:59,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:39:59,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:39:59,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:39:59,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:39:59,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:39:59,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-29 03:39:59,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:39:59,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:59,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:39:59,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:39:59,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:39:59,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:39:59,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:39:59,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:39:59,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:39:59,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:39:59,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:39:59,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:39:59,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-29 03:39:59,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:39:59,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:59,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:39:59,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:39:59,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:39:59,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:39:59,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:39:59,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:39:59,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:39:59,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:39:59,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:39:59,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:39:59,161 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 4 proven. 81 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2020-10-29 03:39:59,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221097101] [2020-10-29 03:39:59,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:39:59,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 03:39:59,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954148919] [2020-10-29 03:39:59,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 03:39:59,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:39:59,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 03:39:59,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-29 03:39:59,163 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand 13 states. [2020-10-29 03:39:59,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:39:59,417 INFO L93 Difference]: Finished difference Result 157 states and 165 transitions. [2020-10-29 03:39:59,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 03:39:59,417 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2020-10-29 03:39:59,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:39:59,419 INFO L225 Difference]: With dead ends: 157 [2020-10-29 03:39:59,419 INFO L226 Difference]: Without dead ends: 90 [2020-10-29 03:39:59,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-29 03:39:59,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-29 03:39:59,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2020-10-29 03:39:59,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-29 03:39:59,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2020-10-29 03:39:59,436 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 80 [2020-10-29 03:39:59,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:39:59,436 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2020-10-29 03:39:59,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 03:39:59,436 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2020-10-29 03:39:59,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-29 03:39:59,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:39:59,437 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:39:59,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 03:39:59,438 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:39:59,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:39:59,438 INFO L82 PathProgramCache]: Analyzing trace with hash 464258914, now seen corresponding path program 16 times [2020-10-29 03:39:59,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:39:59,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [244170296] [2020-10-29 03:39:59,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:39:59,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:39:59,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:59,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:39:59,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:04,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:40:04,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-29 03:40:04,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:40:04,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-29 03:40:04,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:40:04,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:40:04,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 03:40:04,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-29 03:40:04,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 03:40:04,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:40:04,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:40:04,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:40:04,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:04,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:40:04,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:40:04,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:40:04,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:40:04,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:40:04,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:40:04,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:40:04,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:40:04,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:40:04,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:40:04,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-29 03:40:04,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:40:04,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:04,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:40:04,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:40:04,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:40:04,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:40:04,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:40:04,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:40:04,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:40:04,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:40:04,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:40:04,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:40:04,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-29 03:40:04,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:40:04,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:04,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:40:04,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:40:04,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:40:04,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:40:04,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:40:04,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:40:04,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:40:04,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:40:04,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:40:04,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:40:04,656 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 4 proven. 100 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2020-10-29 03:40:04,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [244170296] [2020-10-29 03:40:04,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:40:04,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 03:40:04,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085094628] [2020-10-29 03:40:04,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 03:40:04,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:40:04,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 03:40:04,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:40:04,658 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand 14 states. [2020-10-29 03:40:04,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:40:04,905 INFO L93 Difference]: Finished difference Result 166 states and 174 transitions. [2020-10-29 03:40:04,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 03:40:04,906 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 85 [2020-10-29 03:40:04,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:40:04,907 INFO L225 Difference]: With dead ends: 166 [2020-10-29 03:40:04,908 INFO L226 Difference]: Without dead ends: 95 [2020-10-29 03:40:04,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:40:04,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-29 03:40:04,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2020-10-29 03:40:04,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-29 03:40:04,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2020-10-29 03:40:04,925 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 85 [2020-10-29 03:40:04,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:40:04,925 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2020-10-29 03:40:04,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 03:40:04,926 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2020-10-29 03:40:04,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-29 03:40:04,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:40:04,927 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:40:04,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 03:40:04,927 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:40:04,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:40:04,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1887669296, now seen corresponding path program 17 times [2020-10-29 03:40:04,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:40:04,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869352039] [2020-10-29 03:40:04,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:40:04,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:40:04,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:04,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:05,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:09,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:40:09,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-29 03:40:09,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:40:09,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 03:40:09,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:40:09,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:40:09,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 03:40:09,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-29 03:40:09,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 03:40:09,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:40:10,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:40:10,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:40:10,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:10,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:40:10,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:40:10,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:40:10,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:40:10,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:40:10,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:40:10,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:40:10,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:40:10,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:40:10,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:40:10,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-10-29 03:40:10,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:40:10,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:10,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:40:10,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:40:10,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:40:10,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:40:10,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:40:10,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:40:10,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:40:10,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:40:10,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:40:10,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:40:10,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-10-29 03:40:10,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:40:10,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:10,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:40:10,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:40:10,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:40:10,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:40:10,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:40:10,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:40:10,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:40:10,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:40:10,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:40:10,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:40:10,162 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 4 proven. 121 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2020-10-29 03:40:10,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869352039] [2020-10-29 03:40:10,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:40:10,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 03:40:10,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096678579] [2020-10-29 03:40:10,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 03:40:10,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:40:10,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 03:40:10,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-29 03:40:10,170 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand 15 states. [2020-10-29 03:40:10,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:40:10,515 INFO L93 Difference]: Finished difference Result 175 states and 183 transitions. [2020-10-29 03:40:10,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 03:40:10,516 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 90 [2020-10-29 03:40:10,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:40:10,518 INFO L225 Difference]: With dead ends: 175 [2020-10-29 03:40:10,518 INFO L226 Difference]: Without dead ends: 100 [2020-10-29 03:40:10,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-29 03:40:10,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-29 03:40:10,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2020-10-29 03:40:10,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-29 03:40:10,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 101 transitions. [2020-10-29 03:40:10,547 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 101 transitions. Word has length 90 [2020-10-29 03:40:10,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:40:10,549 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 101 transitions. [2020-10-29 03:40:10,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 03:40:10,549 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 101 transitions. [2020-10-29 03:40:10,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-29 03:40:10,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:40:10,551 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:40:10,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 03:40:10,551 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:40:10,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:40:10,552 INFO L82 PathProgramCache]: Analyzing trace with hash 165488666, now seen corresponding path program 18 times [2020-10-29 03:40:10,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:40:10,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266756710] [2020-10-29 03:40:10,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:40:10,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:40:10,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:10,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:10,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:15,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:40:15,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-29 03:40:15,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:40:15,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 03:40:15,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:40:15,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:40:15,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 03:40:15,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-29 03:40:15,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 03:40:15,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:40:15,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:40:15,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:40:15,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:15,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:40:15,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:40:15,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:40:15,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:40:15,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:40:15,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:40:15,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:40:15,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:40:15,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:40:15,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:40:15,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-29 03:40:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:40:15,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:15,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:40:15,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:40:15,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:40:15,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:40:15,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:40:15,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:40:15,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:40:15,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:40:15,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:40:15,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:40:15,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-29 03:40:15,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:40:15,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:15,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:40:15,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:40:15,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:40:15,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:40:15,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:40:15,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:40:15,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:40:15,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:40:15,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:40:15,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:40:15,830 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 4 proven. 144 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-10-29 03:40:15,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266756710] [2020-10-29 03:40:15,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:40:15,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 03:40:15,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929194745] [2020-10-29 03:40:15,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 03:40:15,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:40:15,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 03:40:15,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:40:15,833 INFO L87 Difference]: Start difference. First operand 98 states and 101 transitions. Second operand 16 states. [2020-10-29 03:40:16,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:40:16,103 INFO L93 Difference]: Finished difference Result 184 states and 192 transitions. [2020-10-29 03:40:16,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 03:40:16,106 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 95 [2020-10-29 03:40:16,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:40:16,107 INFO L225 Difference]: With dead ends: 184 [2020-10-29 03:40:16,107 INFO L226 Difference]: Without dead ends: 105 [2020-10-29 03:40:16,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:40:16,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-29 03:40:16,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2020-10-29 03:40:16,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-29 03:40:16,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 106 transitions. [2020-10-29 03:40:16,124 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 106 transitions. Word has length 95 [2020-10-29 03:40:16,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:40:16,125 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 106 transitions. [2020-10-29 03:40:16,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 03:40:16,125 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 106 transitions. [2020-10-29 03:40:16,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-29 03:40:16,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:40:16,126 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:40:16,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 03:40:16,126 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:40:16,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:40:16,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1598954904, now seen corresponding path program 19 times [2020-10-29 03:40:16,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:40:16,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013871129] [2020-10-29 03:40:16,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:40:16,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:40:16,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:16,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:16,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:21,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:40:21,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-29 03:40:21,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:40:21,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-29 03:40:21,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:40:21,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:40:21,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 03:40:21,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-29 03:40:21,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 03:40:21,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:40:21,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:40:21,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:40:21,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:21,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:40:21,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:40:21,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:40:21,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:40:21,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:40:21,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:40:21,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:40:21,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:40:21,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:40:21,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:40:21,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-29 03:40:21,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:40:21,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:21,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:40:21,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:40:21,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:40:21,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:40:21,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:40:21,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:40:21,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:40:21,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:40:21,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:40:21,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:40:21,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-10-29 03:40:21,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:40:21,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:21,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:40:21,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:40:21,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:40:21,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:40:21,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:40:21,432 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:40:21,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:40:21,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:40:21,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:40:21,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:40:21,442 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 4 proven. 169 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-10-29 03:40:21,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013871129] [2020-10-29 03:40:21,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:40:21,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 03:40:21,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387033282] [2020-10-29 03:40:21,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 03:40:21,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:40:21,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 03:40:21,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:40:21,444 INFO L87 Difference]: Start difference. First operand 103 states and 106 transitions. Second operand 17 states. [2020-10-29 03:40:21,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:40:21,819 INFO L93 Difference]: Finished difference Result 193 states and 201 transitions. [2020-10-29 03:40:21,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 03:40:21,820 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 100 [2020-10-29 03:40:21,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:40:21,821 INFO L225 Difference]: With dead ends: 193 [2020-10-29 03:40:21,821 INFO L226 Difference]: Without dead ends: 110 [2020-10-29 03:40:21,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:40:21,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-29 03:40:21,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2020-10-29 03:40:21,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-29 03:40:21,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 111 transitions. [2020-10-29 03:40:21,842 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 111 transitions. Word has length 100 [2020-10-29 03:40:21,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:40:21,842 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 111 transitions. [2020-10-29 03:40:21,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 03:40:21,842 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 111 transitions. [2020-10-29 03:40:21,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-29 03:40:21,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:40:21,851 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:40:21,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 03:40:21,852 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:40:21,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:40:21,852 INFO L82 PathProgramCache]: Analyzing trace with hash 2043150546, now seen corresponding path program 20 times [2020-10-29 03:40:21,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:40:21,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034015768] [2020-10-29 03:40:21,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:40:21,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:40:21,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:21,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:21,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:26,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:40:26,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-29 03:40:26,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:40:26,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-29 03:40:26,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:40:26,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:40:26,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 03:40:26,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-29 03:40:26,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 03:40:26,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:40:27,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:40:27,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:40:27,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:27,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:40:27,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:40:27,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:40:27,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:40:27,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:40:27,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:40:27,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:40:27,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:40:27,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:40:27,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:40:27,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-29 03:40:27,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:40:27,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:27,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:40:27,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:40:27,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:40:27,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:40:27,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:40:27,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:40:27,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:40:27,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:40:27,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:40:27,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:40:27,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-29 03:40:27,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:40:27,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:27,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:40:27,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:40:27,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:40:27,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:40:27,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:40:27,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:40:27,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:40:27,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:40:27,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:40:27,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:40:27,177 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 4 proven. 196 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2020-10-29 03:40:27,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034015768] [2020-10-29 03:40:27,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:40:27,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 03:40:27,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448173942] [2020-10-29 03:40:27,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 03:40:27,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:40:27,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 03:40:27,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-29 03:40:27,179 INFO L87 Difference]: Start difference. First operand 108 states and 111 transitions. Second operand 18 states. [2020-10-29 03:40:27,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:40:27,552 INFO L93 Difference]: Finished difference Result 202 states and 210 transitions. [2020-10-29 03:40:27,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 03:40:27,552 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 105 [2020-10-29 03:40:27,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:40:27,553 INFO L225 Difference]: With dead ends: 202 [2020-10-29 03:40:27,554 INFO L226 Difference]: Without dead ends: 115 [2020-10-29 03:40:27,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-29 03:40:27,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-29 03:40:27,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2020-10-29 03:40:27,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-29 03:40:27,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 116 transitions. [2020-10-29 03:40:27,574 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 116 transitions. Word has length 105 [2020-10-29 03:40:27,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:40:27,575 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 116 transitions. [2020-10-29 03:40:27,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 03:40:27,575 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 116 transitions. [2020-10-29 03:40:27,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-29 03:40:27,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:40:27,576 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:40:27,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 03:40:27,577 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:40:27,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:40:27,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1422790816, now seen corresponding path program 21 times [2020-10-29 03:40:27,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:40:27,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356771479] [2020-10-29 03:40:27,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:40:27,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:40:27,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:27,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:27,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:32,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:40:32,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-29 03:40:32,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:40:32,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-29 03:40:32,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:40:32,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:40:32,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 03:40:32,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-29 03:40:32,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 03:40:32,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:40:32,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:40:32,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:40:32,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:32,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:40:32,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:40:32,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:40:32,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:40:32,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:40:32,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:40:32,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:40:32,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:40:32,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:40:32,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:40:32,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-10-29 03:40:32,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:40:32,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:32,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:40:32,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:40:32,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:40:32,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:40:32,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:40:32,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:40:32,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:40:32,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:40:32,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:40:32,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:40:32,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-10-29 03:40:32,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:40:32,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:32,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:40:32,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:40:32,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:40:32,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:40:32,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:40:32,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:40:32,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:40:32,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:40:32,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:40:32,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:40:32,974 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 4 proven. 225 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2020-10-29 03:40:32,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356771479] [2020-10-29 03:40:32,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:40:32,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 03:40:32,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240614302] [2020-10-29 03:40:32,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 03:40:32,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:40:32,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 03:40:32,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-29 03:40:32,976 INFO L87 Difference]: Start difference. First operand 113 states and 116 transitions. Second operand 19 states. [2020-10-29 03:40:33,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:40:33,373 INFO L93 Difference]: Finished difference Result 211 states and 219 transitions. [2020-10-29 03:40:33,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 03:40:33,374 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 110 [2020-10-29 03:40:33,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:40:33,375 INFO L225 Difference]: With dead ends: 211 [2020-10-29 03:40:33,375 INFO L226 Difference]: Without dead ends: 120 [2020-10-29 03:40:33,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-29 03:40:33,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-29 03:40:33,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2020-10-29 03:40:33,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-29 03:40:33,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 121 transitions. [2020-10-29 03:40:33,392 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 121 transitions. Word has length 110 [2020-10-29 03:40:33,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:40:33,393 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 121 transitions. [2020-10-29 03:40:33,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 03:40:33,393 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 121 transitions. [2020-10-29 03:40:33,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-29 03:40:33,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:40:33,394 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:40:33,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 03:40:33,394 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:40:33,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:40:33,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1213763978, now seen corresponding path program 22 times [2020-10-29 03:40:33,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:40:33,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821342161] [2020-10-29 03:40:33,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:40:33,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:40:33,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:33,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:33,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:38,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:40:38,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-29 03:40:38,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:40:38,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 03:40:38,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:40:38,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:40:38,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 03:40:38,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-29 03:40:38,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 03:40:38,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:40:38,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:40:38,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:40:38,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:38,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:40:38,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:40:38,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:40:38,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:40:38,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:40:38,753 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:40:38,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:40:38,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:40:38,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:40:38,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:40:38,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-10-29 03:40:38,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:40:38,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:38,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:40:38,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:40:38,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:40:38,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:40:38,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:40:38,759 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:40:38,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:40:38,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:40:38,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:40:38,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:40:38,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-29 03:40:38,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:40:38,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:38,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:40:38,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:40:38,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:40:38,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:40:38,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:40:38,763 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:40:38,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:40:38,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:40:38,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:40:38,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:40:38,782 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 4 proven. 256 refuted. 0 times theorem prover too weak. 404 trivial. 0 not checked. [2020-10-29 03:40:38,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821342161] [2020-10-29 03:40:38,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:40:38,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 03:40:38,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782799040] [2020-10-29 03:40:38,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 03:40:38,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:40:38,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 03:40:38,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:40:38,785 INFO L87 Difference]: Start difference. First operand 118 states and 121 transitions. Second operand 20 states. [2020-10-29 03:40:39,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:40:39,182 INFO L93 Difference]: Finished difference Result 220 states and 228 transitions. [2020-10-29 03:40:39,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 03:40:39,183 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 115 [2020-10-29 03:40:39,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:40:39,184 INFO L225 Difference]: With dead ends: 220 [2020-10-29 03:40:39,184 INFO L226 Difference]: Without dead ends: 125 [2020-10-29 03:40:39,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:40:39,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-29 03:40:39,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2020-10-29 03:40:39,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-29 03:40:39,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 126 transitions. [2020-10-29 03:40:39,212 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 126 transitions. Word has length 115 [2020-10-29 03:40:39,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:40:39,212 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 126 transitions. [2020-10-29 03:40:39,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 03:40:39,212 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 126 transitions. [2020-10-29 03:40:39,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-29 03:40:39,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:40:39,214 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:40:39,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 03:40:39,214 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:40:39,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:40:39,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1914443480, now seen corresponding path program 23 times [2020-10-29 03:40:39,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:40:39,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588117558] [2020-10-29 03:40:39,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:40:39,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:40:39,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:39,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:39,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:44,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:40:44,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-29 03:40:44,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:40:44,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5066 [2020-10-29 03:40:44,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:40:44,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:40:44,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 03:40:44,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-29 03:40:44,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 03:40:44,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:40:44,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:40:44,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:40:44,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:44,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:40:44,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:40:44,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:40:44,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:40:44,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:40:44,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:40:44,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:40:44,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:40:44,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:40:44,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:40:44,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-10-29 03:40:44,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:40:44,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:44,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:40:44,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:40:44,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:40:44,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:40:44,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:40:44,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:40:44,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:40:44,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:40:44,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:40:44,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:40:44,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-10-29 03:40:44,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:40:44,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:44,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:40:44,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:40:44,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:40:44,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:40:44,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:40:44,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:40:44,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:40:44,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:40:44,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:40:44,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:40:44,683 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 4 proven. 289 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2020-10-29 03:40:44,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588117558] [2020-10-29 03:40:44,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:40:44,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 03:40:44,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329988122] [2020-10-29 03:40:44,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 03:40:44,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:40:44,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 03:40:44,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-29 03:40:44,685 INFO L87 Difference]: Start difference. First operand 123 states and 126 transitions. Second operand 21 states. [2020-10-29 03:40:45,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:40:45,011 INFO L93 Difference]: Finished difference Result 229 states and 237 transitions. [2020-10-29 03:40:45,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 03:40:45,012 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 120 [2020-10-29 03:40:45,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:40:45,013 INFO L225 Difference]: With dead ends: 229 [2020-10-29 03:40:45,013 INFO L226 Difference]: Without dead ends: 130 [2020-10-29 03:40:45,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-29 03:40:45,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-29 03:40:45,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 128. [2020-10-29 03:40:45,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-29 03:40:45,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 131 transitions. [2020-10-29 03:40:45,033 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 131 transitions. Word has length 120 [2020-10-29 03:40:45,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:40:45,033 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 131 transitions. [2020-10-29 03:40:45,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 03:40:45,034 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 131 transitions. [2020-10-29 03:40:45,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-29 03:40:45,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:40:45,035 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:40:45,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 03:40:45,035 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:40:45,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:40:45,035 INFO L82 PathProgramCache]: Analyzing trace with hash -512042430, now seen corresponding path program 24 times [2020-10-29 03:40:45,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:40:45,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936144244] [2020-10-29 03:40:45,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:40:45,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:40:45,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:45,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:45,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:50,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:40:50,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-29 03:40:50,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:40:50,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-29 03:40:50,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:40:50,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:40:50,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 03:40:50,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-29 03:40:50,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 03:40:50,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:40:50,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:40:50,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:40:50,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:50,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:40:50,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:40:50,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:40:50,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:40:50,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:40:50,497 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:40:50,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:40:50,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:40:50,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:40:50,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:40:50,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-29 03:40:50,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:40:50,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:50,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:40:50,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:40:50,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:40:50,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:40:50,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:40:50,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:40:50,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:40:50,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:40:50,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:40:50,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:40:50,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-10-29 03:40:50,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:40:50,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:50,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:40:50,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:40:50,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:40:50,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:40:50,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:40:50,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:40:50,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:40:50,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:40:50,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:40:50,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:40:50,530 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 4 proven. 324 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2020-10-29 03:40:50,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936144244] [2020-10-29 03:40:50,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:40:50,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 03:40:50,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87072062] [2020-10-29 03:40:50,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 03:40:50,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:40:50,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 03:40:50,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-29 03:40:50,532 INFO L87 Difference]: Start difference. First operand 128 states and 131 transitions. Second operand 22 states. [2020-10-29 03:40:50,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:40:50,906 INFO L93 Difference]: Finished difference Result 238 states and 246 transitions. [2020-10-29 03:40:50,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 03:40:50,907 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 125 [2020-10-29 03:40:50,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:40:50,908 INFO L225 Difference]: With dead ends: 238 [2020-10-29 03:40:50,909 INFO L226 Difference]: Without dead ends: 135 [2020-10-29 03:40:50,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-29 03:40:50,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-29 03:40:50,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2020-10-29 03:40:50,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-29 03:40:50,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 136 transitions. [2020-10-29 03:40:50,932 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 136 transitions. Word has length 125 [2020-10-29 03:40:50,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:40:50,932 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 136 transitions. [2020-10-29 03:40:50,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 03:40:50,932 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 136 transitions. [2020-10-29 03:40:50,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-29 03:40:50,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:40:50,933 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:40:50,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 03:40:50,933 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:40:50,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:40:50,934 INFO L82 PathProgramCache]: Analyzing trace with hash -555748080, now seen corresponding path program 25 times [2020-10-29 03:40:50,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:40:50,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870863885] [2020-10-29 03:40:50,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:40:50,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:40:50,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:51,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:51,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:56,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:40:56,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-29 03:40:56,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:40:56,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5102 [2020-10-29 03:40:56,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:40:56,057 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:40:56,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 03:40:56,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-29 03:40:56,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 03:40:56,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:40:56,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:40:56,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:40:56,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:56,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:40:56,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:40:56,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:40:56,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:40:56,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:40:56,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:40:56,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:40:56,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:40:56,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:40:56,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:40:56,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-29 03:40:56,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:40:56,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:56,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:40:56,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:40:56,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:40:56,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:40:56,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:40:56,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:40:56,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:40:56,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:40:56,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:40:56,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:40:56,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-10-29 03:40:56,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:40:56,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:56,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:40:56,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:40:56,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:40:56,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:40:56,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:40:56,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:40:56,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:40:56,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:40:56,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:40:56,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:40:56,488 INFO L134 CoverageAnalysis]: Checked inductivity of 928 backedges. 4 proven. 361 refuted. 0 times theorem prover too weak. 563 trivial. 0 not checked. [2020-10-29 03:40:56,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870863885] [2020-10-29 03:40:56,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:40:56,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 03:40:56,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510343099] [2020-10-29 03:40:56,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 03:40:56,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:40:56,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 03:40:56,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-29 03:40:56,490 INFO L87 Difference]: Start difference. First operand 133 states and 136 transitions. Second operand 23 states. [2020-10-29 03:40:56,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:40:56,869 INFO L93 Difference]: Finished difference Result 247 states and 255 transitions. [2020-10-29 03:40:56,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 03:40:56,870 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 130 [2020-10-29 03:40:56,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:40:56,871 INFO L225 Difference]: With dead ends: 247 [2020-10-29 03:40:56,872 INFO L226 Difference]: Without dead ends: 140 [2020-10-29 03:40:56,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-29 03:40:56,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-29 03:40:56,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2020-10-29 03:40:56,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-29 03:40:56,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 141 transitions. [2020-10-29 03:40:56,896 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 141 transitions. Word has length 130 [2020-10-29 03:40:56,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:40:56,897 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 141 transitions. [2020-10-29 03:40:56,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 03:40:56,897 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 141 transitions. [2020-10-29 03:40:56,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-29 03:40:56,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:40:56,898 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:40:56,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 03:40:56,898 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:40:56,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:40:56,899 INFO L82 PathProgramCache]: Analyzing trace with hash -2145723654, now seen corresponding path program 26 times [2020-10-29 03:40:56,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:40:56,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028049445] [2020-10-29 03:40:56,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:40:56,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:40:56,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:57,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:40:57,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:02,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:41:02,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-29 03:41:02,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:41:02,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5083 [2020-10-29 03:41:02,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:41:02,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:41:02,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-29 03:41:02,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-29 03:41:02,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 03:41:02,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:41:02,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:41:02,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:02,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:02,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:41:02,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:41:02,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:41:02,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:41:02,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:41:02,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:41:02,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:41:02,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:41:02,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:41:02,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:41:02,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-10-29 03:41:02,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:02,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:02,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:41:02,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:41:02,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:41:02,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:41:02,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:41:02,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:41:02,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:41:02,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:41:02,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:41:02,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:41:02,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-10-29 03:41:02,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:02,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:02,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:41:02,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:41:02,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:41:02,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:41:02,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:41:02,471 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:41:02,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:41:02,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:41:02,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:41:02,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:41:02,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 4 proven. 400 refuted. 0 times theorem prover too weak. 622 trivial. 0 not checked. [2020-10-29 03:41:02,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028049445] [2020-10-29 03:41:02,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:41:02,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 03:41:02,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495246012] [2020-10-29 03:41:02,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 03:41:02,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:41:02,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 03:41:02,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-29 03:41:02,496 INFO L87 Difference]: Start difference. First operand 138 states and 141 transitions. Second operand 24 states. [2020-10-29 03:41:02,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:41:02,938 INFO L93 Difference]: Finished difference Result 256 states and 264 transitions. [2020-10-29 03:41:02,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 03:41:02,938 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 135 [2020-10-29 03:41:02,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:41:02,940 INFO L225 Difference]: With dead ends: 256 [2020-10-29 03:41:02,940 INFO L226 Difference]: Without dead ends: 145 [2020-10-29 03:41:02,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-29 03:41:02,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-29 03:41:02,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 143. [2020-10-29 03:41:02,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-29 03:41:02,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 146 transitions. [2020-10-29 03:41:02,966 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 146 transitions. Word has length 135 [2020-10-29 03:41:02,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:41:02,966 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 146 transitions. [2020-10-29 03:41:02,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-29 03:41:02,967 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 146 transitions. [2020-10-29 03:41:02,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-29 03:41:02,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:41:02,968 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:41:02,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 03:41:02,968 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:41:02,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:41:02,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1113434952, now seen corresponding path program 27 times [2020-10-29 03:41:02,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:41:02,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216360435] [2020-10-29 03:41:02,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:41:02,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:03,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:03,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:03,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:08,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:41:08,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-29 03:41:08,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:41:08,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5117 [2020-10-29 03:41:08,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:41:08,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:41:08,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-29 03:41:08,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-10-29 03:41:08,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 03:41:08,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 14 [2020-10-29 03:41:08,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:41:08,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:08,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:08,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:41:08,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:41:08,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:41:08,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:41:08,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:41:08,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:41:08,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:41:08,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:41:08,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:41:08,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:41:08,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-10-29 03:41:08,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:08,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:08,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:41:08,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:41:08,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:41:08,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:41:08,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:41:08,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:41:08,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:41:08,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:41:08,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:41:08,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:41:08,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-10-29 03:41:08,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:08,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:08,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:41:08,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:41:08,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:41:08,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:41:08,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:41:08,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:41:08,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:41:08,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:41:08,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:41:08,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:41:08,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1129 backedges. 4 proven. 441 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2020-10-29 03:41:08,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216360435] [2020-10-29 03:41:08,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:41:08,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-29 03:41:08,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832825275] [2020-10-29 03:41:08,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-29 03:41:08,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:41:08,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-29 03:41:08,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-29 03:41:08,646 INFO L87 Difference]: Start difference. First operand 143 states and 146 transitions. Second operand 25 states. [2020-10-29 03:41:09,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:41:09,036 INFO L93 Difference]: Finished difference Result 265 states and 273 transitions. [2020-10-29 03:41:09,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 03:41:09,037 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 140 [2020-10-29 03:41:09,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:41:09,039 INFO L225 Difference]: With dead ends: 265 [2020-10-29 03:41:09,039 INFO L226 Difference]: Without dead ends: 150 [2020-10-29 03:41:09,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-29 03:41:09,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-29 03:41:09,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2020-10-29 03:41:09,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-29 03:41:09,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 151 transitions. [2020-10-29 03:41:09,061 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 151 transitions. Word has length 140 [2020-10-29 03:41:09,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:41:09,062 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 151 transitions. [2020-10-29 03:41:09,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-29 03:41:09,062 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 151 transitions. [2020-10-29 03:41:09,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-29 03:41:09,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:41:09,063 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:41:09,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 03:41:09,063 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:41:09,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:41:09,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1847890866, now seen corresponding path program 28 times [2020-10-29 03:41:09,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:41:09,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826802038] [2020-10-29 03:41:09,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:41:09,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:09,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:09,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:09,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:14,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:41:14,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-29 03:41:14,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:41:14,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-29 03:41:14,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:41:14,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:41:14,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-29 03:41:14,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-29 03:41:14,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 03:41:14,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:41:14,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:41:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:14,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:14,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:41:14,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:41:14,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:41:14,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:41:14,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:41:14,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:41:14,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:41:14,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:41:14,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:41:14,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:41:14,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-10-29 03:41:14,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:14,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:14,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:41:14,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:41:14,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:41:14,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:41:14,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:41:14,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:41:14,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:41:14,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:41:14,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:41:14,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:41:14,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-10-29 03:41:14,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:14,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:14,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:41:14,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:41:14,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:41:14,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:41:14,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:41:14,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:41:14,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:41:14,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:41:14,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:41:14,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:41:14,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1237 backedges. 4 proven. 484 refuted. 0 times theorem prover too weak. 749 trivial. 0 not checked. [2020-10-29 03:41:14,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826802038] [2020-10-29 03:41:14,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:41:14,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-29 03:41:14,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651014304] [2020-10-29 03:41:14,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-29 03:41:14,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:41:14,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-29 03:41:14,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-29 03:41:14,648 INFO L87 Difference]: Start difference. First operand 148 states and 151 transitions. Second operand 26 states. [2020-10-29 03:41:15,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:41:15,037 INFO L93 Difference]: Finished difference Result 274 states and 282 transitions. [2020-10-29 03:41:15,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 03:41:15,038 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 145 [2020-10-29 03:41:15,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:41:15,039 INFO L225 Difference]: With dead ends: 274 [2020-10-29 03:41:15,039 INFO L226 Difference]: Without dead ends: 155 [2020-10-29 03:41:15,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-29 03:41:15,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-29 03:41:15,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 153. [2020-10-29 03:41:15,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-29 03:41:15,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 156 transitions. [2020-10-29 03:41:15,077 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 156 transitions. Word has length 145 [2020-10-29 03:41:15,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:41:15,078 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 156 transitions. [2020-10-29 03:41:15,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-29 03:41:15,078 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 156 transitions. [2020-10-29 03:41:15,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-29 03:41:15,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:41:15,079 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:41:15,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 03:41:15,079 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:41:15,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:41:15,080 INFO L82 PathProgramCache]: Analyzing trace with hash -992396928, now seen corresponding path program 29 times [2020-10-29 03:41:15,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:41:15,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653774548] [2020-10-29 03:41:15,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:41:15,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:15,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:15,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:15,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:20,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:41:20,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-29 03:41:20,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:41:20,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5235 [2020-10-29 03:41:20,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:41:20,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:41:20,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-29 03:41:20,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-29 03:41:20,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 03:41:20,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:41:20,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:41:20,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:20,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:20,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:41:20,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:41:20,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:41:20,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:41:20,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:41:20,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:41:20,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:41:20,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:41:20,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:41:20,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:41:20,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-10-29 03:41:20,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:20,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:20,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:41:20,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:41:20,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:41:20,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:41:20,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:41:20,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:41:20,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:41:20,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:41:20,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:41:20,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:41:20,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2020-10-29 03:41:20,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:20,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:20,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:41:20,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:41:20,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:41:20,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:41:20,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:41:20,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:41:20,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:41:20,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:41:20,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:41:20,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:41:20,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1350 backedges. 4 proven. 529 refuted. 0 times theorem prover too weak. 817 trivial. 0 not checked. [2020-10-29 03:41:20,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653774548] [2020-10-29 03:41:20,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:41:20,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-29 03:41:20,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140413818] [2020-10-29 03:41:20,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-29 03:41:20,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:41:20,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-29 03:41:20,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-29 03:41:20,947 INFO L87 Difference]: Start difference. First operand 153 states and 156 transitions. Second operand 27 states. [2020-10-29 03:41:21,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:41:21,494 INFO L93 Difference]: Finished difference Result 283 states and 291 transitions. [2020-10-29 03:41:21,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-29 03:41:21,495 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 150 [2020-10-29 03:41:21,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:41:21,497 INFO L225 Difference]: With dead ends: 283 [2020-10-29 03:41:21,497 INFO L226 Difference]: Without dead ends: 160 [2020-10-29 03:41:21,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-29 03:41:21,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-29 03:41:21,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2020-10-29 03:41:21,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-29 03:41:21,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 161 transitions. [2020-10-29 03:41:21,525 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 161 transitions. Word has length 150 [2020-10-29 03:41:21,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:41:21,525 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 161 transitions. [2020-10-29 03:41:21,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-29 03:41:21,525 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 161 transitions. [2020-10-29 03:41:21,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-29 03:41:21,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:41:21,526 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:41:21,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-29 03:41:21,527 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:41:21,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:41:21,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1149502570, now seen corresponding path program 30 times [2020-10-29 03:41:21,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:41:21,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909505288] [2020-10-29 03:41:21,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:41:21,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:21,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:21,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:21,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:26,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:41:26,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-29 03:41:26,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:41:26,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-29 03:41:26,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:41:26,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:41:26,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-29 03:41:26,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-29 03:41:26,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 03:41:26,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:41:27,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:41:27,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:27,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:27,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:41:27,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:41:27,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:41:27,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:41:27,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:41:27,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:41:27,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:41:27,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:41:27,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:41:27,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:41:27,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-10-29 03:41:27,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:27,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:27,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:41:27,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:41:27,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:41:27,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:41:27,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:41:27,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:41:27,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:41:27,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:41:27,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:41:27,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:41:27,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-10-29 03:41:27,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:27,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:27,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:41:27,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:41:27,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:41:27,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:41:27,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:41:27,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:41:27,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:41:27,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:41:27,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:41:27,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:41:27,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1468 backedges. 4 proven. 576 refuted. 0 times theorem prover too weak. 888 trivial. 0 not checked. [2020-10-29 03:41:27,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909505288] [2020-10-29 03:41:27,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:41:27,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-29 03:41:27,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898512394] [2020-10-29 03:41:27,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-29 03:41:27,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:41:27,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-29 03:41:27,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-29 03:41:27,186 INFO L87 Difference]: Start difference. First operand 158 states and 161 transitions. Second operand 28 states. [2020-10-29 03:41:27,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:41:27,755 INFO L93 Difference]: Finished difference Result 292 states and 300 transitions. [2020-10-29 03:41:27,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 03:41:27,756 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 155 [2020-10-29 03:41:27,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:41:27,758 INFO L225 Difference]: With dead ends: 292 [2020-10-29 03:41:27,758 INFO L226 Difference]: Without dead ends: 165 [2020-10-29 03:41:27,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-29 03:41:27,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-29 03:41:27,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 163. [2020-10-29 03:41:27,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-29 03:41:27,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 166 transitions. [2020-10-29 03:41:27,790 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 166 transitions. Word has length 155 [2020-10-29 03:41:27,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:41:27,790 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 166 transitions. [2020-10-29 03:41:27,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-29 03:41:27,791 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 166 transitions. [2020-10-29 03:41:27,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-29 03:41:27,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:41:27,792 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:41:27,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-29 03:41:27,792 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:41:27,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:41:27,792 INFO L82 PathProgramCache]: Analyzing trace with hash -812212296, now seen corresponding path program 31 times [2020-10-29 03:41:27,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:41:27,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601893149] [2020-10-29 03:41:27,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:41:27,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:27,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:27,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:28,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:32,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:41:32,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-29 03:41:32,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:41:32,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-29 03:41:32,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:41:32,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:41:32,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-29 03:41:32,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-29 03:41:32,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-29 03:41:32,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:41:33,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:41:33,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:33,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:33,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:41:33,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:41:33,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:41:33,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:41:33,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:41:33,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:41:33,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:41:33,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:41:33,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:41:33,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:41:33,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2020-10-29 03:41:33,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:33,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:33,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:41:33,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:41:33,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:41:33,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:41:33,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:41:33,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:41:33,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:41:33,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:41:33,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:41:33,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:41:33,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-10-29 03:41:33,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:33,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:33,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:41:33,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:41:33,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:41:33,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:41:33,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:41:33,471 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:41:33,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:41:33,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:41:33,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:41:33,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:41:33,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 4 proven. 625 refuted. 0 times theorem prover too weak. 962 trivial. 0 not checked. [2020-10-29 03:41:33,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601893149] [2020-10-29 03:41:33,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:41:33,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-29 03:41:33,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114167240] [2020-10-29 03:41:33,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-29 03:41:33,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:41:33,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-29 03:41:33,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-29 03:41:33,489 INFO L87 Difference]: Start difference. First operand 163 states and 166 transitions. Second operand 29 states. [2020-10-29 03:41:33,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:41:33,975 INFO L93 Difference]: Finished difference Result 301 states and 309 transitions. [2020-10-29 03:41:33,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 03:41:33,976 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 160 [2020-10-29 03:41:33,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:41:33,978 INFO L225 Difference]: With dead ends: 301 [2020-10-29 03:41:33,978 INFO L226 Difference]: Without dead ends: 170 [2020-10-29 03:41:33,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-29 03:41:33,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-29 03:41:34,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 168. [2020-10-29 03:41:34,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-29 03:41:34,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 171 transitions. [2020-10-29 03:41:34,006 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 171 transitions. Word has length 160 [2020-10-29 03:41:34,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:41:34,007 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 171 transitions. [2020-10-29 03:41:34,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-29 03:41:34,007 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 171 transitions. [2020-10-29 03:41:34,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-29 03:41:34,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:41:34,008 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:41:34,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-29 03:41:34,008 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:41:34,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:41:34,009 INFO L82 PathProgramCache]: Analyzing trace with hash 723856674, now seen corresponding path program 32 times [2020-10-29 03:41:34,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:41:34,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165821645] [2020-10-29 03:41:34,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:41:34,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:34,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:34,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:34,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:39,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:41:39,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-29 03:41:39,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:41:39,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5125 [2020-10-29 03:41:39,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:41:39,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:41:39,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-29 03:41:39,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-29 03:41:39,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 03:41:39,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:41:39,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:41:39,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:39,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:39,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:41:39,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:41:39,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:41:39,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:41:39,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:41:39,878 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:41:39,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:41:39,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:41:39,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:41:39,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:41:39,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-10-29 03:41:39,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:39,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:39,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:41:39,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:41:39,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:41:39,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:41:39,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:41:39,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:41:39,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:41:39,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:41:39,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:41:39,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:41:39,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-10-29 03:41:39,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:39,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:39,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:41:39,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:41:39,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:41:39,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:41:39,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:41:39,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:41:39,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:41:39,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:41:39,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:41:39,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:41:39,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1719 backedges. 4 proven. 676 refuted. 0 times theorem prover too weak. 1039 trivial. 0 not checked. [2020-10-29 03:41:39,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165821645] [2020-10-29 03:41:39,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:41:39,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-29 03:41:39,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097670083] [2020-10-29 03:41:39,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-29 03:41:39,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:41:39,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-29 03:41:39,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-29 03:41:39,904 INFO L87 Difference]: Start difference. First operand 168 states and 171 transitions. Second operand 30 states. [2020-10-29 03:41:40,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:41:40,427 INFO L93 Difference]: Finished difference Result 310 states and 318 transitions. [2020-10-29 03:41:40,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-29 03:41:40,427 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 165 [2020-10-29 03:41:40,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:41:40,429 INFO L225 Difference]: With dead ends: 310 [2020-10-29 03:41:40,429 INFO L226 Difference]: Without dead ends: 175 [2020-10-29 03:41:40,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-29 03:41:40,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-29 03:41:40,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2020-10-29 03:41:40,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-29 03:41:40,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 176 transitions. [2020-10-29 03:41:40,460 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 176 transitions. Word has length 165 [2020-10-29 03:41:40,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:41:40,460 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 176 transitions. [2020-10-29 03:41:40,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-29 03:41:40,461 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 176 transitions. [2020-10-29 03:41:40,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-29 03:41:40,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:41:40,462 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:41:40,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-29 03:41:40,462 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:41:40,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:41:40,463 INFO L82 PathProgramCache]: Analyzing trace with hash -858137104, now seen corresponding path program 33 times [2020-10-29 03:41:40,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:41:40,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209646560] [2020-10-29 03:41:40,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:41:40,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:40,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:40,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:40,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:45,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:41:45,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-29 03:41:45,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:41:45,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-29 03:41:45,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:41:45,553 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:41:45,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-29 03:41:45,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 96 [2020-10-29 03:41:45,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 03:41:45,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:41:46,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:41:46,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:46,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:46,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:41:46,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:41:46,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:41:46,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:41:46,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:41:46,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:41:46,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:41:46,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:41:46,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:41:46,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:41:46,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2020-10-29 03:41:46,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:46,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:46,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:41:46,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:41:46,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:41:46,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:41:46,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:41:46,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:41:46,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:41:46,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:41:46,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:41:46,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:41:46,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2020-10-29 03:41:46,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:46,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:46,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:41:46,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:41:46,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:41:46,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:41:46,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:41:46,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:41:46,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:41:46,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:41:46,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:41:46,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:41:46,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1852 backedges. 4 proven. 729 refuted. 0 times theorem prover too weak. 1119 trivial. 0 not checked. [2020-10-29 03:41:46,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209646560] [2020-10-29 03:41:46,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:41:46,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-29 03:41:46,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366697267] [2020-10-29 03:41:46,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-29 03:41:46,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:41:46,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-29 03:41:46,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-29 03:41:46,281 INFO L87 Difference]: Start difference. First operand 173 states and 176 transitions. Second operand 31 states. [2020-10-29 03:41:46,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:41:46,907 INFO L93 Difference]: Finished difference Result 319 states and 327 transitions. [2020-10-29 03:41:46,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-29 03:41:46,908 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 170 [2020-10-29 03:41:46,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:41:46,909 INFO L225 Difference]: With dead ends: 319 [2020-10-29 03:41:46,910 INFO L226 Difference]: Without dead ends: 180 [2020-10-29 03:41:46,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-29 03:41:46,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-29 03:41:46,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2020-10-29 03:41:46,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-29 03:41:46,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 181 transitions. [2020-10-29 03:41:46,940 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 181 transitions. Word has length 170 [2020-10-29 03:41:46,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:41:46,940 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 181 transitions. [2020-10-29 03:41:46,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-29 03:41:46,940 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 181 transitions. [2020-10-29 03:41:46,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-29 03:41:46,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:41:46,942 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:41:46,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-29 03:41:46,942 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:41:46,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:41:46,942 INFO L82 PathProgramCache]: Analyzing trace with hash 418647514, now seen corresponding path program 34 times [2020-10-29 03:41:46,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:41:46,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106177786] [2020-10-29 03:41:46,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:41:46,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:47,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:47,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:47,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:52,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:41:52,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-29 03:41:52,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:41:52,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-29 03:41:52,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:41:52,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:41:52,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-29 03:41:52,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 99 [2020-10-29 03:41:52,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-29 03:41:52,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:41:52,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:41:52,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:52,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:52,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:41:52,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:41:52,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:41:52,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:41:52,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:41:52,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:41:52,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:41:52,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:41:52,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:41:52,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:41:52,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-10-29 03:41:52,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:52,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:52,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:41:52,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:41:52,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:41:52,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:41:52,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:41:52,825 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:41:52,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:41:52,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:41:52,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:41:52,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:41:52,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-10-29 03:41:52,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:52,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:52,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:41:52,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:41:52,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:41:52,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:41:52,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:41:52,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:41:52,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:41:52,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:41:52,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:41:52,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:41:52,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1990 backedges. 4 proven. 784 refuted. 0 times theorem prover too weak. 1202 trivial. 0 not checked. [2020-10-29 03:41:52,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106177786] [2020-10-29 03:41:52,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:41:52,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-29 03:41:52,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227309972] [2020-10-29 03:41:52,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-29 03:41:52,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:41:52,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-29 03:41:52,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-29 03:41:52,849 INFO L87 Difference]: Start difference. First operand 178 states and 181 transitions. Second operand 32 states. [2020-10-29 03:41:53,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:41:53,385 INFO L93 Difference]: Finished difference Result 328 states and 336 transitions. [2020-10-29 03:41:53,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-29 03:41:53,386 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 175 [2020-10-29 03:41:53,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:41:53,388 INFO L225 Difference]: With dead ends: 328 [2020-10-29 03:41:53,388 INFO L226 Difference]: Without dead ends: 185 [2020-10-29 03:41:53,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-29 03:41:53,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-29 03:41:53,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2020-10-29 03:41:53,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-29 03:41:53,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 186 transitions. [2020-10-29 03:41:53,420 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 186 transitions. Word has length 175 [2020-10-29 03:41:53,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:41:53,421 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 186 transitions. [2020-10-29 03:41:53,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-29 03:41:53,421 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 186 transitions. [2020-10-29 03:41:53,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-29 03:41:53,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:41:53,422 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:41:53,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-29 03:41:53,422 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:41:53,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:41:53,423 INFO L82 PathProgramCache]: Analyzing trace with hash -404294616, now seen corresponding path program 35 times [2020-10-29 03:41:53,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:41:53,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202833741] [2020-10-29 03:41:53,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:41:53,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:53,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:53,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:58,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:41:58,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-29 03:41:58,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:41:58,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5056 [2020-10-29 03:41:58,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:41:58,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:41:58,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-29 03:41:58,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-29 03:41:58,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-29 03:41:58,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:41:59,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:41:59,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:59,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:59,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:41:59,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:41:59,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:41:59,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:41:59,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:41:59,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:41:59,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:41:59,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:41:59,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:41:59,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:41:59,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-10-29 03:41:59,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:59,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:59,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:41:59,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:41:59,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:41:59,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:41:59,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:41:59,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:41:59,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:41:59,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:41:59,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:41:59,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:41:59,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2020-10-29 03:41:59,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:59,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:59,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:41:59,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:41:59,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:41:59,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:41:59,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:41:59,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:41:59,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:41:59,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 03:41:59,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:41:59,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:41:59,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2133 backedges. 4 proven. 841 refuted. 0 times theorem prover too weak. 1288 trivial. 0 not checked. [2020-10-29 03:41:59,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1202833741] [2020-10-29 03:41:59,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:41:59,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-29 03:41:59,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228759926] [2020-10-29 03:41:59,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-29 03:41:59,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:41:59,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-29 03:41:59,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 03:41:59,344 INFO L87 Difference]: Start difference. First operand 183 states and 186 transitions. Second operand 33 states. [2020-10-29 03:41:59,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:41:59,884 INFO L93 Difference]: Finished difference Result 337 states and 345 transitions. [2020-10-29 03:41:59,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-29 03:41:59,885 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 180 [2020-10-29 03:41:59,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:41:59,887 INFO L225 Difference]: With dead ends: 337 [2020-10-29 03:41:59,887 INFO L226 Difference]: Without dead ends: 190 [2020-10-29 03:41:59,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 03:41:59,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-29 03:41:59,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2020-10-29 03:41:59,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-29 03:41:59,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 191 transitions. [2020-10-29 03:41:59,915 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 191 transitions. Word has length 180 [2020-10-29 03:41:59,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:41:59,916 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 191 transitions. [2020-10-29 03:41:59,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-29 03:41:59,916 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 191 transitions. [2020-10-29 03:41:59,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-29 03:41:59,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:41:59,917 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:41:59,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-29 03:41:59,917 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:41:59,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:41:59,917 INFO L82 PathProgramCache]: Analyzing trace with hash 333227666, now seen corresponding path program 36 times [2020-10-29 03:41:59,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:41:59,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760303502] [2020-10-29 03:41:59,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:41:59,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:59,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:00,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking...