/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-fpi/brs1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 03:50:03,248 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 03:50:03,251 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 03:50:03,289 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 03:50:03,290 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 03:50:03,291 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 03:50:03,293 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 03:50:03,296 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 03:50:03,299 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 03:50:03,300 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 03:50:03,302 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 03:50:03,304 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 03:50:03,304 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 03:50:03,306 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 03:50:03,307 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 03:50:03,309 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 03:50:03,310 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 03:50:03,311 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 03:50:03,314 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 03:50:03,316 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 03:50:03,318 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 03:50:03,320 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 03:50:03,322 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 03:50:03,323 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 03:50:03,327 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 03:50:03,327 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 03:50:03,327 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 03:50:03,329 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 03:50:03,329 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 03:50:03,331 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 03:50:03,331 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 03:50:03,332 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 03:50:03,333 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 03:50:03,335 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 03:50:03,336 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 03:50:03,337 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 03:50:03,338 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 03:50:03,338 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 03:50:03,339 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 03:50:03,341 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 03:50:03,342 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 03:50:03,343 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 03:50:03,420 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 03:50:03,421 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 03:50:03,426 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 03:50:03,426 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 03:50:03,426 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 03:50:03,427 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 03:50:03,427 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 03:50:03,427 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 03:50:03,428 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 03:50:03,428 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 03:50:03,429 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 03:50:03,430 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 03:50:03,430 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 03:50:03,430 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 03:50:03,431 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 03:50:03,431 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 03:50:03,431 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 03:50:03,431 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 03:50:03,432 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 03:50:03,432 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 03:50:03,432 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 03:50:03,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 03:50:03,433 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 03:50:03,433 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 03:50:03,433 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 03:50:03,434 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 03:50:03,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 03:50:03,434 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 03:50:03,434 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 03:50:03,435 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 03:50:03,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 03:50:03,954 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 03:50:03,959 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 03:50:03,961 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 03:50:03,962 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 03:50:03,964 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs1.c [2020-10-29 03:50:04,078 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/614a23d1f/0fbffe78a290403a82c6c69b3a442fea/FLAGd1d4d3a20 [2020-10-29 03:50:04,736 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 03:50:04,737 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs1.c [2020-10-29 03:50:04,745 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/614a23d1f/0fbffe78a290403a82c6c69b3a442fea/FLAGd1d4d3a20 [2020-10-29 03:50:05,111 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/614a23d1f/0fbffe78a290403a82c6c69b3a442fea [2020-10-29 03:50:05,116 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 03:50:05,123 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 03:50:05,125 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 03:50:05,126 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 03:50:05,130 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 03:50:05,131 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:50:05" (1/1) ... [2020-10-29 03:50:05,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b835bcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:50:05, skipping insertion in model container [2020-10-29 03:50:05,135 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:50:05" (1/1) ... [2020-10-29 03:50:05,144 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 03:50:05,160 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 03:50:05,351 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 03:50:05,362 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 03:50:05,388 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 03:50:05,409 INFO L208 MainTranslator]: Completed translation [2020-10-29 03:50:05,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:50:05 WrapperNode [2020-10-29 03:50:05,410 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 03:50:05,411 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 03:50:05,411 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 03:50:05,412 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 03:50:05,427 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:50:05" (1/1) ... [2020-10-29 03:50:05,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:50:05" (1/1) ... [2020-10-29 03:50:05,437 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:50:05" (1/1) ... [2020-10-29 03:50:05,438 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:50:05" (1/1) ... [2020-10-29 03:50:05,447 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:50:05" (1/1) ... [2020-10-29 03:50:05,453 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:50:05" (1/1) ... [2020-10-29 03:50:05,456 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:50:05" (1/1) ... [2020-10-29 03:50:05,458 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 03:50:05,460 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 03:50:05,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 03:50:05,460 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 03:50:05,461 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:50:05" (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 03:50:05,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 03:50:05,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 03:50:05,560 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 03:50:05,560 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 03:50:05,561 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 03:50:05,562 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 03:50:05,562 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 03:50:05,562 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 03:50:05,562 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 03:50:05,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 03:50:05,564 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 03:50:05,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 03:50:05,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 03:50:05,565 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-29 03:50:05,565 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 03:50:05,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-29 03:50:05,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 03:50:05,566 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 03:50:05,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 03:50:05,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 03:50:05,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 03:50:05,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 03:50:05,953 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 03:50:05,954 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-29 03:50:05,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:50:05 BoogieIcfgContainer [2020-10-29 03:50:05,957 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 03:50:05,958 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 03:50:05,959 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 03:50:05,963 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 03:50:05,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 03:50:05" (1/3) ... [2020-10-29 03:50:05,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40422216 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 03:50:05, skipping insertion in model container [2020-10-29 03:50:05,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:50:05" (2/3) ... [2020-10-29 03:50:05,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40422216 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 03:50:05, skipping insertion in model container [2020-10-29 03:50:05,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:50:05" (3/3) ... [2020-10-29 03:50:05,967 INFO L111 eAbstractionObserver]: Analyzing ICFG brs1.c [2020-10-29 03:50:05,981 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 03:50:05,991 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 03:50:06,030 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 03:50:06,063 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 03:50:06,063 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 03:50:06,063 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 03:50:06,064 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 03:50:06,064 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 03:50:06,064 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 03:50:06,064 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 03:50:06,064 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 03:50:06,086 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-29 03:50:06,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 03:50:06,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:50:06,095 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:50:06,096 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:50:06,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:50:06,103 INFO L82 PathProgramCache]: Analyzing trace with hash 288317380, now seen corresponding path program 1 times [2020-10-29 03:50:06,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:50:06,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112405093] [2020-10-29 03:50:06,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:50:06,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:06,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:06,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:06,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:06,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:06,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 03:50:06,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:50:06,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 311 [2020-10-29 03:50:06,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:06,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:06,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:50:06,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 03:50:06,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:50:06,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 03:50:06,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:50:06,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:06,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:06,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:06,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:50:06,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:50:06,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 03:50:06,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:06,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:06,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:50:06,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:50:06,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:50:06,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:50:06,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:50:06,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:06,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:06,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:06,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:06,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:50:06,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:50:06,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 03:50:06,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:06,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:06,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:50:06,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:50:06,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:50:06,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:50:06,803 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 03:50:06,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112405093] [2020-10-29 03:50:06,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 03:50:06,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 03:50:06,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822375452] [2020-10-29 03:50:06,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-29 03:50:06,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:50:06,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-29 03:50:06,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-29 03:50:06,840 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-10-29 03:50:07,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:50:07,040 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2020-10-29 03:50:07,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-29 03:50:07,042 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-10-29 03:50:07,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:50:07,051 INFO L225 Difference]: With dead ends: 61 [2020-10-29 03:50:07,053 INFO L226 Difference]: Without dead ends: 27 [2020-10-29 03:50:07,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-29 03:50:07,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-29 03:50:07,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-29 03:50:07,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-29 03:50:07,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-29 03:50:07,133 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2020-10-29 03:50:07,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:50:07,133 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-29 03:50:07,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-29 03:50:07,134 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-29 03:50:07,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 03:50:07,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:50:07,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:50:07,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 03:50:07,137 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:50:07,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:50:07,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1231035376, now seen corresponding path program 1 times [2020-10-29 03:50:07,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:50:07,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952965574] [2020-10-29 03:50:07,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:50:07,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:07,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:07,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:07,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:07,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 03:50:07,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:50:07,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 331 [2020-10-29 03:50:07,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:07,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:07,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 03:50:07,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:50:07,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 03:50:07,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 03:50:07,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:50:07,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:07,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:07,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:07,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:50:07,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:50:07,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 03:50:07,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:07,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:07,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:50:07,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:50:07,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:50:07,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:50:07,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:50:07,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:07,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:07,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:07,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:50:07,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:50:07,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 03:50:07,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:07,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:07,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:50:07,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:50:07,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:50:07,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:50:07,721 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 03:50:07,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952965574] [2020-10-29 03:50:07,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 03:50:07,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 03:50:07,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072572306] [2020-10-29 03:50:07,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 03:50:07,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:50:07,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 03:50:07,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 03:50:07,730 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 5 states. [2020-10-29 03:50:07,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:50:07,968 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-10-29 03:50:07,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 03:50:07,970 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-29 03:50:07,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:50:07,971 INFO L225 Difference]: With dead ends: 40 [2020-10-29 03:50:07,971 INFO L226 Difference]: Without dead ends: 29 [2020-10-29 03:50:07,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 03:50:07,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-29 03:50:07,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-29 03:50:07,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-29 03:50:07,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-29 03:50:07,989 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2020-10-29 03:50:07,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:50:07,989 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-29 03:50:07,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 03:50:07,990 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-29 03:50:07,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 03:50:07,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:50:07,992 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:50:07,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 03:50:07,992 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:50:07,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:50:07,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1214934215, now seen corresponding path program 1 times [2020-10-29 03:50:07,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:50:07,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589762477] [2020-10-29 03:50:07,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:50:08,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:08,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:08,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:08,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:08,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:08,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 03:50:08,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:50:08,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 957 [2020-10-29 03:50:08,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:08,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:08,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 03:50:08,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:50:08,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 03:50:08,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:50:09,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:50:09,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:09,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:09,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:09,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:50:09,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:50:09,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 03:50:09,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:09,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:09,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:50:09,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:50:09,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:50:09,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:50:09,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:50:09,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:09,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:09,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:09,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:50:09,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:50:09,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:50:09,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:09,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:09,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:50:09,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:50:09,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:50:09,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:50:09,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:50:09,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589762477] [2020-10-29 03:50:09,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:50:09,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 03:50:09,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300930701] [2020-10-29 03:50:09,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 03:50:09,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:50:09,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 03:50:09,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-29 03:50:09,186 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 10 states. [2020-10-29 03:50:09,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:50:09,603 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-10-29 03:50:09,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 03:50:09,604 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-29 03:50:09,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:50:09,606 INFO L225 Difference]: With dead ends: 62 [2020-10-29 03:50:09,606 INFO L226 Difference]: Without dead ends: 55 [2020-10-29 03:50:09,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:50:09,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-29 03:50:09,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2020-10-29 03:50:09,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-29 03:50:09,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-10-29 03:50:09,616 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 28 [2020-10-29 03:50:09,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:50:09,617 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-10-29 03:50:09,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 03:50:09,617 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-10-29 03:50:09,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 03:50:09,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:50:09,618 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:50:09,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 03:50:09,619 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:50:09,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:50:09,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1894992585, now seen corresponding path program 1 times [2020-10-29 03:50:09,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:50:09,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799044457] [2020-10-29 03:50:09,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:50:09,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:09,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:09,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:09,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:10,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:10,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 03:50:10,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:50:10,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 560 [2020-10-29 03:50:10,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:10,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:10,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 03:50:10,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:50:10,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 03:50:10,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:50:10,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:50:10,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:10,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:10,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:10,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:50:10,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:50:10,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 03:50:10,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:10,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:10,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:50:10,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:50:10,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:50:10,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-29 03:50:10,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:50:10,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:10,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:10,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:10,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:50:10,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:50:10,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 03:50:10,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:10,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:10,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:50:10,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:50:10,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:50:10,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:50:10,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 03:50:10,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799044457] [2020-10-29 03:50:10,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 03:50:10,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 03:50:10,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262168595] [2020-10-29 03:50:10,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 03:50:10,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:50:10,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 03:50:10,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 03:50:10,392 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 8 states. [2020-10-29 03:50:10,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:50:10,685 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2020-10-29 03:50:10,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 03:50:10,686 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-29 03:50:10,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:50:10,687 INFO L225 Difference]: With dead ends: 51 [2020-10-29 03:50:10,687 INFO L226 Difference]: Without dead ends: 37 [2020-10-29 03:50:10,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-29 03:50:10,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-29 03:50:10,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-29 03:50:10,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-29 03:50:10,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-10-29 03:50:10,696 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 28 [2020-10-29 03:50:10,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:50:10,696 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-10-29 03:50:10,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 03:50:10,696 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-10-29 03:50:10,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 03:50:10,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:50:10,698 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:50:10,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 03:50:10,698 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:50:10,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:50:10,699 INFO L82 PathProgramCache]: Analyzing trace with hash 358433618, now seen corresponding path program 1 times [2020-10-29 03:50:10,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:50:10,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574730131] [2020-10-29 03:50:10,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:50:10,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:10,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:10,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:10,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:11,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:11,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:11,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:11,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:11,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:12,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:12,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:12,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:12,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:12,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:13,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:13,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:13,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:15,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:15,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 03:50:15,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-29 03:50:15,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4979 [2020-10-29 03:50:15,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:15,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:15,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 03:50:15,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:50:15,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 03:50:15,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 03:50:16,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:50:16,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:16,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:16,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:16,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:50:16,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:50:16,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 03:50:16,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:16,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:16,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:50:16,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:50:16,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:50:16,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 03:50:16,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:50:16,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:16,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:16,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:16,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:50:16,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:50:16,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:50:16,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:16,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:16,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:50:16,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:50:16,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:50:16,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:50:16,033 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:50:16,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574730131] [2020-10-29 03:50:16,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:50:16,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 03:50:16,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945767836] [2020-10-29 03:50:16,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 03:50:16,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:50:16,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 03:50:16,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-29 03:50:16,037 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 13 states. [2020-10-29 03:50:16,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:50:16,736 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-10-29 03:50:16,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 03:50:16,737 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-29 03:50:16,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:50:16,738 INFO L225 Difference]: With dead ends: 60 [2020-10-29 03:50:16,738 INFO L226 Difference]: Without dead ends: 41 [2020-10-29 03:50:16,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2020-10-29 03:50:16,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-29 03:50:16,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-10-29 03:50:16,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-29 03:50:16,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-29 03:50:16,756 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 34 [2020-10-29 03:50:16,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:50:16,757 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-29 03:50:16,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 03:50:16,757 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-29 03:50:16,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 03:50:16,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:50:16,760 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:50:16,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 03:50:16,760 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:50:16,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:50:16,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1908223552, now seen corresponding path program 2 times [2020-10-29 03:50:16,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:50:16,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955890517] [2020-10-29 03:50:16,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:50:16,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:16,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:16,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:16,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:17,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:17,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:17,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:17,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:18,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:18,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:19,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:20,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:21,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:21,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:21,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:21,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:21,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:21,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 03:50:21,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 03:50:21,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 03:50:21,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:21,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:21,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 03:50:21,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:50:21,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 03:50:21,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:50:22,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:50:22,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:22,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:22,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:22,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:50:22,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:50:22,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 03:50:22,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:22,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:22,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:50:22,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:50:22,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:50:22,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:50:22,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:50:22,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:22,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:22,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:22,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:50:22,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:50:22,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:50:22,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:22,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:22,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:50:22,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:50:22,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:50:22,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:50:22,088 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 03:50:22,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955890517] [2020-10-29 03:50:22,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:50:22,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 03:50:22,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370198659] [2020-10-29 03:50:22,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 03:50:22,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:50:22,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 03:50:22,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-29 03:50:22,091 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 13 states. [2020-10-29 03:50:22,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:50:22,702 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2020-10-29 03:50:22,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 03:50:22,703 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-10-29 03:50:22,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:50:22,704 INFO L225 Difference]: With dead ends: 63 [2020-10-29 03:50:22,704 INFO L226 Difference]: Without dead ends: 45 [2020-10-29 03:50:22,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2020-10-29 03:50:22,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-29 03:50:22,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2020-10-29 03:50:22,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-29 03:50:22,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-29 03:50:22,712 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 37 [2020-10-29 03:50:22,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:50:22,713 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-29 03:50:22,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 03:50:22,713 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-29 03:50:22,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 03:50:22,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:50:22,714 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:50:22,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 03:50:22,715 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:50:22,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:50:22,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1936208361, now seen corresponding path program 3 times [2020-10-29 03:50:22,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:50:22,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1057277643] [2020-10-29 03:50:22,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:50:22,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:22,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:22,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:22,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:23,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:23,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:24,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:24,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:24,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:24,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:25,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:25,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:25,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:26,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:26,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:26,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:26,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:27,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:27,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:27,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 03:50:27,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-29 03:50:27,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 03:50:27,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:27,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:27,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 03:50:27,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:50:27,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 03:50:27,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:50:28,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:50:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:28,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:28,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:28,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:50:28,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:50:28,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 03:50:28,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:28,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:28,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:50:28,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:50:28,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:50:28,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:50:28,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:50:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:28,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:28,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:28,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:50:28,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:50:28,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:50:28,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:28,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:28,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:50:28,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:50:28,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:50:28,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:50:28,419 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:50:28,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1057277643] [2020-10-29 03:50:28,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:50:28,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 03:50:28,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403888706] [2020-10-29 03:50:28,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 03:50:28,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:50:28,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 03:50:28,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:50:28,423 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 17 states. [2020-10-29 03:50:29,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:50:29,532 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2020-10-29 03:50:29,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 03:50:29,533 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2020-10-29 03:50:29,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:50:29,534 INFO L225 Difference]: With dead ends: 66 [2020-10-29 03:50:29,534 INFO L226 Difference]: Without dead ends: 47 [2020-10-29 03:50:29,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2020-10-29 03:50:29,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-29 03:50:29,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2020-10-29 03:50:29,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-29 03:50:29,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-29 03:50:29,545 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 40 [2020-10-29 03:50:29,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:50:29,546 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-29 03:50:29,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 03:50:29,546 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-29 03:50:29,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 03:50:29,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:50:29,547 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:50:29,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 03:50:29,547 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:50:29,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:50:29,548 INFO L82 PathProgramCache]: Analyzing trace with hash 928510299, now seen corresponding path program 4 times [2020-10-29 03:50:29,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:50:29,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205965314] [2020-10-29 03:50:29,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:50:29,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:29,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:29,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:29,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:29,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:29,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:29,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:30,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:30,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:33,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:34,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:34,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:34,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:34,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 03:50:34,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 03:50:34,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 03:50:34,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:34,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:34,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 03:50:34,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:50:34,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 03:50:34,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:50:34,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:50:34,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:34,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:34,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:34,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:50:34,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:50:34,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 03:50:34,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:34,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:34,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:50:34,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:50:34,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:50:34,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:50:34,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:50:34,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:34,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:34,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:34,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:50:34,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:50:34,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:50:34,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:34,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:34,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:50:34,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:50:34,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:50:34,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:50:34,903 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 03:50:34,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205965314] [2020-10-29 03:50:34,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:50:34,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 03:50:34,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578446647] [2020-10-29 03:50:34,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 03:50:34,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:50:34,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 03:50:34,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:50:34,907 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 16 states. [2020-10-29 03:50:35,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:50:35,841 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2020-10-29 03:50:35,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 03:50:35,842 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-10-29 03:50:35,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:50:35,843 INFO L225 Difference]: With dead ends: 72 [2020-10-29 03:50:35,843 INFO L226 Difference]: Without dead ends: 51 [2020-10-29 03:50:35,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2020-10-29 03:50:35,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-29 03:50:35,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2020-10-29 03:50:35,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-29 03:50:35,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-29 03:50:35,852 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 43 [2020-10-29 03:50:35,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:50:35,853 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-29 03:50:35,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 03:50:35,853 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-29 03:50:35,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 03:50:35,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:50:35,854 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:50:35,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 03:50:35,854 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:50:35,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:50:35,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1294265358, now seen corresponding path program 5 times [2020-10-29 03:50:35,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:50:35,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085244651] [2020-10-29 03:50:35,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:50:35,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:35,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:36,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:36,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:36,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:37,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:37,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:37,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:38,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:38,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:39,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:40,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:40,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:40,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-29 03:50:40,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 03:50:40,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 03:50:40,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:40,891 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:40,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 03:50:40,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:50:40,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 03:50:40,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:50:41,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:50:41,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:41,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:41,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:41,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:50:41,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:50:41,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 03:50:41,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:41,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:41,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:50:41,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:50:41,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:50:41,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:50:41,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:50:41,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:41,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:41,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:41,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:50:41,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:50:41,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:50:41,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:41,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:41,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:50:41,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:50:41,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:50:41,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:50:41,909 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:50:41,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085244651] [2020-10-29 03:50:41,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:50:41,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 03:50:41,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229545912] [2020-10-29 03:50:41,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 03:50:41,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:50:41,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 03:50:41,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2020-10-29 03:50:41,912 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 21 states. [2020-10-29 03:50:43,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:50:43,618 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2020-10-29 03:50:43,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 03:50:43,618 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2020-10-29 03:50:43,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:50:43,619 INFO L225 Difference]: With dead ends: 75 [2020-10-29 03:50:43,620 INFO L226 Difference]: Without dead ends: 53 [2020-10-29 03:50:43,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 03:50:43,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-29 03:50:43,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2020-10-29 03:50:43,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-29 03:50:43,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-10-29 03:50:43,630 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 46 [2020-10-29 03:50:43,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:50:43,631 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-10-29 03:50:43,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 03:50:43,631 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-10-29 03:50:43,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 03:50:43,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:50:43,632 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:50:43,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 03:50:43,632 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:50:43,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:50:43,633 INFO L82 PathProgramCache]: Analyzing trace with hash -436856416, now seen corresponding path program 6 times [2020-10-29 03:50:43,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:50:43,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456391873] [2020-10-29 03:50:43,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:50:43,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:43,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:43,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:44,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:44,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:45,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:45,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:45,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:45,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:45,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:45,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:45,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:45,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:46,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:46,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:46,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:46,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:47,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:48,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:48,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 03:50:48,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-29 03:50:48,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 03:50:48,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:48,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:48,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 03:50:48,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:50:48,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 03:50:48,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:50:49,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:50:49,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:49,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:49,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:49,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:50:49,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:50:49,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:50:49,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:49,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:49,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:50:49,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:50:49,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:50:49,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:50:49,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:50:49,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:49,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:49,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:49,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:50:49,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:50:49,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:50:49,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:49,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:49,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:50:49,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:50:49,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:50:49,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:50:49,048 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 03:50:49,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456391873] [2020-10-29 03:50:49,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:50:49,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 03:50:49,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182978506] [2020-10-29 03:50:49,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 03:50:49,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:50:49,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 03:50:49,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-10-29 03:50:49,051 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 19 states. [2020-10-29 03:50:50,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:50:50,106 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2020-10-29 03:50:50,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 03:50:50,107 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 49 [2020-10-29 03:50:50,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:50:50,108 INFO L225 Difference]: With dead ends: 81 [2020-10-29 03:50:50,108 INFO L226 Difference]: Without dead ends: 57 [2020-10-29 03:50:50,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=340, Invalid=1142, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 03:50:50,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-29 03:50:50,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2020-10-29 03:50:50,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-29 03:50:50,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-29 03:50:50,119 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 49 [2020-10-29 03:50:50,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:50:50,119 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-29 03:50:50,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 03:50:50,120 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-29 03:50:50,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 03:50:50,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:50:50,121 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:50:50,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 03:50:50,121 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:50:50,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:50:50,121 INFO L82 PathProgramCache]: Analyzing trace with hash 988065527, now seen corresponding path program 7 times [2020-10-29 03:50:50,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:50:50,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1577962912] [2020-10-29 03:50:50,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:50:50,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:50,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:50,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:50,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:50,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:51,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:51,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:51,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:52,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:53,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:53,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:53,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:54,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:55,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:55,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 03:50:55,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 03:50:55,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 03:50:55,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:55,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:55,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-29 03:50:55,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:50:55,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 03:50:55,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:50:56,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:50:56,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:56,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:56,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:56,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:50:56,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:50:56,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:50:56,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:56,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:56,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:50:56,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:50:56,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:50:56,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:50:56,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:50:56,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:56,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:56,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:50:56,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:50:56,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:50:56,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:50:56,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:50:56,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:50:56,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:50:56,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:50:56,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:50:56,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:50:56,654 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:50:56,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1577962912] [2020-10-29 03:50:56,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:50:56,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-29 03:50:56,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189123916] [2020-10-29 03:50:56,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-29 03:50:56,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:50:56,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-29 03:50:56,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2020-10-29 03:50:56,657 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 25 states. [2020-10-29 03:50:58,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:50:58,767 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2020-10-29 03:50:58,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 03:50:58,768 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 52 [2020-10-29 03:50:58,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:50:58,770 INFO L225 Difference]: With dead ends: 84 [2020-10-29 03:50:58,770 INFO L226 Difference]: Without dead ends: 59 [2020-10-29 03:50:58,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=200, Invalid=1282, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 03:50:58,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-29 03:50:58,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2020-10-29 03:50:58,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-29 03:50:58,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-29 03:50:58,782 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 52 [2020-10-29 03:50:58,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:50:58,782 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-29 03:50:58,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-29 03:50:58,782 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-29 03:50:58,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 03:50:58,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:50:58,783 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:50:58,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 03:50:58,784 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:50:58,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:50:58,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1144724357, now seen corresponding path program 8 times [2020-10-29 03:50:58,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:50:58,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665472076] [2020-10-29 03:50:58,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:50:58,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:50:58,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:58,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:58,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:59,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:59,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:59,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:59,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:59,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:50:59,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:00,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:03,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:51:03,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 03:51:03,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 03:51:03,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 03:51:03,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:51:03,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:51:03,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 03:51:03,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:51:03,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 03:51:03,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:51:04,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:51:04,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:51:04,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:04,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:51:04,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:51:04,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:51:04,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:51:04,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:51:04,008 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:51:04,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:51:04,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:51:04,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:51:04,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:51:04,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:51:04,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:51:04,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:04,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:51:04,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:51:04,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:51:04,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:51:04,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:51:04,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:51:04,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:51:04,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:51:04,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:51:04,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:51:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:51:04,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1665472076] [2020-10-29 03:51:04,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:51:04,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 03:51:04,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883755479] [2020-10-29 03:51:04,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 03:51:04,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:51:04,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 03:51:04,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:51:04,023 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 16 states. [2020-10-29 03:51:04,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:51:04,441 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2020-10-29 03:51:04,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 03:51:04,442 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 55 [2020-10-29 03:51:04,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:51:04,444 INFO L225 Difference]: With dead ends: 104 [2020-10-29 03:51:04,444 INFO L226 Difference]: Without dead ends: 63 [2020-10-29 03:51:04,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2020-10-29 03:51:04,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-29 03:51:04,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2020-10-29 03:51:04,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-29 03:51:04,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-10-29 03:51:04,456 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 55 [2020-10-29 03:51:04,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:51:04,456 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-10-29 03:51:04,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 03:51:04,457 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-10-29 03:51:04,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 03:51:04,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:51:04,458 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:51:04,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 03:51:04,458 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:51:04,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:51:04,459 INFO L82 PathProgramCache]: Analyzing trace with hash 552459410, now seen corresponding path program 9 times [2020-10-29 03:51:04,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:51:04,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097880682] [2020-10-29 03:51:04,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:51:04,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:51:04,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:04,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:04,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:05,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:06,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:07,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:07,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:07,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:08,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:09,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:51:09,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 03:51:09,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 03:51:09,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 03:51:09,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:51:09,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:51:09,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-29 03:51:09,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:51:09,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 03:51:09,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:51:10,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:51:10,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:51:10,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:10,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:51:10,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:51:10,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:51:10,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:51:10,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:51:10,917 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:51:10,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:51:10,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:51:10,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:51:10,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:51:10,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:51:10,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:51:10,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:10,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:51:10,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:51:10,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:51:10,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:51:10,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:51:10,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:51:10,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:51:10,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:51:10,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:51:10,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:51:10,947 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:51:10,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097880682] [2020-10-29 03:51:10,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:51:10,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-29 03:51:10,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119859067] [2020-10-29 03:51:10,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-29 03:51:10,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:51:10,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-29 03:51:10,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2020-10-29 03:51:10,949 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 29 states. [2020-10-29 03:51:13,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:51:13,846 INFO L93 Difference]: Finished difference Result 93 states and 99 transitions. [2020-10-29 03:51:13,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-29 03:51:13,848 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 58 [2020-10-29 03:51:13,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:51:13,849 INFO L225 Difference]: With dead ends: 93 [2020-10-29 03:51:13,849 INFO L226 Difference]: Without dead ends: 65 [2020-10-29 03:51:13,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=261, Invalid=1809, Unknown=0, NotChecked=0, Total=2070 [2020-10-29 03:51:13,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-29 03:51:13,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-10-29 03:51:13,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-29 03:51:13,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-29 03:51:13,865 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 58 [2020-10-29 03:51:13,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:51:13,866 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-29 03:51:13,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-29 03:51:13,866 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-29 03:51:13,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 03:51:13,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:51:13,867 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:51:13,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 03:51:13,867 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:51:13,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:51:13,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1104612608, now seen corresponding path program 10 times [2020-10-29 03:51:13,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:51:13,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851487107] [2020-10-29 03:51:13,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:51:13,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:51:13,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:13,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:14,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:14,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:14,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:14,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:14,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:14,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:14,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:15,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:15,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:18,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:51:18,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 03:51:18,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 03:51:18,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 03:51:18,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:51:18,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:51:18,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 03:51:18,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:51:18,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 03:51:18,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:51:19,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:51:19,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:51:19,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:19,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:51:19,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:51:19,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:51:19,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:51:19,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:51:19,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:51:19,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:51:19,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:51:19,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:51:19,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:51:19,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:51:19,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:51:19,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:19,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:51:19,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:51:19,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:51:19,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:51:19,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:51:19,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:51:19,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:51:19,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:51:19,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:51:19,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:51:19,124 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 54 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:51:19,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851487107] [2020-10-29 03:51:19,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:51:19,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 03:51:19,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119066912] [2020-10-29 03:51:19,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 03:51:19,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:51:19,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 03:51:19,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-10-29 03:51:19,126 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 18 states. [2020-10-29 03:51:19,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:51:19,600 INFO L93 Difference]: Finished difference Result 116 states and 121 transitions. [2020-10-29 03:51:19,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 03:51:19,601 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 61 [2020-10-29 03:51:19,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:51:19,602 INFO L225 Difference]: With dead ends: 116 [2020-10-29 03:51:19,602 INFO L226 Difference]: Without dead ends: 69 [2020-10-29 03:51:19,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-10-29 03:51:19,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-29 03:51:19,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2020-10-29 03:51:19,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-29 03:51:19,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-10-29 03:51:19,622 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 61 [2020-10-29 03:51:19,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:51:19,622 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-10-29 03:51:19,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 03:51:19,622 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-10-29 03:51:19,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-29 03:51:19,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:51:19,623 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:51:19,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 03:51:19,624 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:51:19,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:51:19,624 INFO L82 PathProgramCache]: Analyzing trace with hash -216705065, now seen corresponding path program 11 times [2020-10-29 03:51:19,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:51:19,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508723141] [2020-10-29 03:51:19,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:51:19,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:51:19,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:19,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:20,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:20,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:20,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:21,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:22,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:22,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:22,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:24,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:24,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:24,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:51:24,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 03:51:24,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 03:51:24,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 03:51:24,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:51:24,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:51:24,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-29 03:51:24,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:51:24,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-29 03:51:24,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:51:26,221 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-29 03:51:26,392 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-10-29 03:51:26,597 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2020-10-29 03:51:26,787 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2020-10-29 03:51:26,963 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-10-29 03:51:27,139 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-10-29 03:51:28,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:51:28,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:51:28,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:28,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:51:28,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:51:28,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:51:28,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:51:28,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:51:28,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:51:28,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:51:28,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:51:28,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:51:28,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:51:28,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:51:28,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:51:28,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:28,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:51:28,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:51:28,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:51:28,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:51:28,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:51:28,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:51:28,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:51:28,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:51:28,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:51:28,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:51:28,108 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 5 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:51:28,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508723141] [2020-10-29 03:51:28,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:51:28,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-29 03:51:28,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901150416] [2020-10-29 03:51:28,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-29 03:51:28,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:51:28,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-29 03:51:28,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1205, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 03:51:28,110 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 37 states. [2020-10-29 03:51:30,279 WARN L193 SmtUtils]: Spent 777.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 115 [2020-10-29 03:51:30,545 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 45 [2020-10-29 03:51:30,758 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 51 [2020-10-29 03:51:30,980 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 51 [2020-10-29 03:51:31,260 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 53 [2020-10-29 03:51:31,682 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 84 [2020-10-29 03:51:32,043 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 79 [2020-10-29 03:51:32,350 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 90 [2020-10-29 03:51:32,676 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2020-10-29 03:51:33,110 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 97 [2020-10-29 03:51:33,556 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 100 [2020-10-29 03:51:33,971 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 88 [2020-10-29 03:51:34,480 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 106 [2020-10-29 03:51:34,994 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 108 [2020-10-29 03:51:35,461 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 95 [2020-10-29 03:51:36,019 WARN L193 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 112 [2020-10-29 03:51:36,666 WARN L193 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 101 [2020-10-29 03:51:37,112 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 94 [2020-10-29 03:51:37,894 WARN L193 SmtUtils]: Spent 678.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 110 [2020-10-29 03:51:38,717 WARN L193 SmtUtils]: Spent 741.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 112 [2020-10-29 03:51:39,574 WARN L193 SmtUtils]: Spent 766.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 115 [2020-10-29 03:51:39,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:51:39,888 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2020-10-29 03:51:39,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-29 03:51:39,889 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 64 [2020-10-29 03:51:39,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:51:39,890 INFO L225 Difference]: With dead ends: 100 [2020-10-29 03:51:39,891 INFO L226 Difference]: Without dead ends: 70 [2020-10-29 03:51:39,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1320 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=666, Invalid=4446, Unknown=0, NotChecked=0, Total=5112 [2020-10-29 03:51:39,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-29 03:51:39,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2020-10-29 03:51:39,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-29 03:51:39,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-10-29 03:51:39,903 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 64 [2020-10-29 03:51:39,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:51:39,903 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-10-29 03:51:39,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-29 03:51:39,903 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-10-29 03:51:39,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 03:51:39,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:51:39,904 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:51:39,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 03:51:39,907 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:51:39,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:51:39,908 INFO L82 PathProgramCache]: Analyzing trace with hash -216233568, now seen corresponding path program 12 times [2020-10-29 03:51:39,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:51:39,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117448843] [2020-10-29 03:51:39,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:51:39,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:51:39,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:40,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:40,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:41,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:44,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:44,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:44,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:51:44,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 03:51:44,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:51:44,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-29 03:51:44,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:51:44,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:51:44,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-29 03:51:44,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:51:44,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 03:51:44,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:51:46,082 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-10-29 03:51:46,393 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-10-29 03:51:47,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:51:47,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:51:47,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:47,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:51:47,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:51:47,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:51:47,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:51:47,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:51:47,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:51:47,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:51:47,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:51:47,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:51:47,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:51:47,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:51:47,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:51:47,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:47,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:51:47,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:51:47,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:51:47,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:51:47,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:51:47,866 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:51:47,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:51:47,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:51:47,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:51:47,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:51:47,917 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 72 proven. 83 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-29 03:51:47,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117448843] [2020-10-29 03:51:47,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:51:47,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-29 03:51:47,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527788265] [2020-10-29 03:51:47,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-29 03:51:47,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:51:47,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-29 03:51:47,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1182, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 03:51:47,920 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 37 states. [2020-10-29 03:51:48,494 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-29 03:51:48,696 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-10-29 03:51:48,920 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-10-29 03:51:49,107 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-10-29 03:51:49,331 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-29 03:51:49,551 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2020-10-29 03:51:49,768 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2020-10-29 03:51:49,980 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2020-10-29 03:51:50,977 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 92 [2020-10-29 03:51:51,524 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 54 [2020-10-29 03:51:51,743 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 53 [2020-10-29 03:51:52,031 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 47 [2020-10-29 03:51:52,334 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 47 [2020-10-29 03:51:52,602 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 48 [2020-10-29 03:51:52,850 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 47 [2020-10-29 03:51:53,136 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 47 [2020-10-29 03:51:53,378 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 48 [2020-10-29 03:51:53,619 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 47 [2020-10-29 03:51:53,828 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 46 [2020-10-29 03:51:54,027 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 47 [2020-10-29 03:51:54,212 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 46 [2020-10-29 03:51:54,495 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 47 [2020-10-29 03:51:54,672 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 48 [2020-10-29 03:51:54,864 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 47 [2020-10-29 03:51:55,098 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2020-10-29 03:51:55,639 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-10-29 03:51:56,140 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 71 [2020-10-29 03:51:56,661 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 74 [2020-10-29 03:51:56,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:51:56,988 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2020-10-29 03:51:56,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-29 03:51:56,989 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 67 [2020-10-29 03:51:56,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:51:56,990 INFO L225 Difference]: With dead ends: 78 [2020-10-29 03:51:56,990 INFO L226 Difference]: Without dead ends: 71 [2020-10-29 03:51:56,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1572 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=873, Invalid=4979, Unknown=0, NotChecked=0, Total=5852 [2020-10-29 03:51:56,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-29 03:51:57,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-29 03:51:57,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-29 03:51:57,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2020-10-29 03:51:57,005 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 67 [2020-10-29 03:51:57,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:51:57,005 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2020-10-29 03:51:57,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-29 03:51:57,005 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2020-10-29 03:51:57,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 03:51:57,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:51:57,006 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:51:57,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 03:51:57,007 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:51:57,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:51:57,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1737727282, now seen corresponding path program 13 times [2020-10-29 03:51:57,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:51:57,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449695457] [2020-10-29 03:51:57,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:51:57,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:51:57,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:57,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:57,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:51:58,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:01,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:01,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:01,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:02,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:52:02,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 03:52:02,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 03:52:02,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5083 [2020-10-29 03:52:02,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:52:02,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:52:02,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-29 03:52:02,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:52:02,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-29 03:52:02,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:52:04,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:52:04,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:52:04,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:04,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:52:04,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:52:04,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:52:04,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:52:04,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:52:04,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:52:04,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:52:04,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:52:04,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:52:04,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:52:04,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:52:04,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:52:04,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:04,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:52:04,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:52:04,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:52:04,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:52:04,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:52:04,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:52:04,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:52:04,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:52:04,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:52:04,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:52:04,570 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:52:04,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449695457] [2020-10-29 03:52:04,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:52:04,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-29 03:52:04,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051480255] [2020-10-29 03:52:04,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-29 03:52:04,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:52:04,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-29 03:52:04,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 03:52:04,573 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand 37 states. [2020-10-29 03:52:05,762 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47 [2020-10-29 03:52:05,945 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 51 [2020-10-29 03:52:06,314 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2020-10-29 03:52:06,482 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2020-10-29 03:52:06,817 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2020-10-29 03:52:06,980 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2020-10-29 03:52:08,794 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2020-10-29 03:52:08,966 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-10-29 03:52:09,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:52:09,709 INFO L93 Difference]: Finished difference Result 111 states and 119 transitions. [2020-10-29 03:52:09,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-29 03:52:09,710 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 70 [2020-10-29 03:52:09,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:52:09,712 INFO L225 Difference]: With dead ends: 111 [2020-10-29 03:52:09,712 INFO L226 Difference]: Without dead ends: 77 [2020-10-29 03:52:09,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=463, Invalid=3569, Unknown=0, NotChecked=0, Total=4032 [2020-10-29 03:52:09,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-29 03:52:09,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2020-10-29 03:52:09,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-29 03:52:09,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-10-29 03:52:09,723 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 70 [2020-10-29 03:52:09,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:52:09,724 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-10-29 03:52:09,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-29 03:52:09,724 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-10-29 03:52:09,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 03:52:09,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:52:09,725 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:52:09,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 03:52:09,725 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:52:09,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:52:09,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1801320352, now seen corresponding path program 14 times [2020-10-29 03:52:09,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:52:09,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132488271] [2020-10-29 03:52:09,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:52:09,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:52:09,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:10,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:10,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:10,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:10,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:10,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:10,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:10,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:10,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:10,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:10,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:11,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:11,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:14,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:52:14,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-29 03:52:14,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 03:52:14,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 03:52:14,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:52:14,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:52:14,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 03:52:14,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:52:14,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-29 03:52:14,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:52:15,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:52:15,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:52:15,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:15,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:52:15,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:52:15,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:52:15,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 03:52:15,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:52:15,121 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:52:15,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:52:15,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:52:15,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:52:15,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:52:15,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:52:15,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:52:15,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:15,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:52:15,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:52:15,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:52:15,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:52:15,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:52:15,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:52:15,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:52:15,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:52:15,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:52:15,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:52:15,143 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 102 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:52:15,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132488271] [2020-10-29 03:52:15,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:52:15,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 03:52:15,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11302012] [2020-10-29 03:52:15,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 03:52:15,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:52:15,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 03:52:15,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-29 03:52:15,145 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 22 states. [2020-10-29 03:52:15,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:52:15,899 INFO L93 Difference]: Finished difference Result 140 states and 145 transitions. [2020-10-29 03:52:15,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 03:52:15,900 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 73 [2020-10-29 03:52:15,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:52:15,902 INFO L225 Difference]: With dead ends: 140 [2020-10-29 03:52:15,902 INFO L226 Difference]: Without dead ends: 81 [2020-10-29 03:52:15,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=758, Unknown=0, NotChecked=0, Total=992 [2020-10-29 03:52:15,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-29 03:52:15,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2020-10-29 03:52:15,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-29 03:52:15,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2020-10-29 03:52:15,911 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 73 [2020-10-29 03:52:15,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:52:15,911 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2020-10-29 03:52:15,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 03:52:15,912 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2020-10-29 03:52:15,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 03:52:15,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:52:15,912 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:52:15,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 03:52:15,913 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:52:15,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:52:15,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1999910729, now seen corresponding path program 15 times [2020-10-29 03:52:15,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:52:15,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564631804] [2020-10-29 03:52:15,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:52:15,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:52:15,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:16,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:16,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:17,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:19,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:19,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:20,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:21,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:52:21,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 03:52:21,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 03:52:21,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5073 [2020-10-29 03:52:21,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:52:21,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:52:21,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-29 03:52:21,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:52:21,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-29 03:52:21,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:52:23,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:52:23,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:52:23,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:23,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:52:23,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:52:23,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:52:23,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:52:23,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:52:23,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:52:23,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:52:23,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:52:23,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:52:23,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:52:23,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:52:23,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:52:23,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:23,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:52:23,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:52:23,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:52:23,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:52:23,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:52:23,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:52:23,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:52:23,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:52:23,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:52:23,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:52:24,022 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:52:24,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564631804] [2020-10-29 03:52:24,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:52:24,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-29 03:52:24,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892902996] [2020-10-29 03:52:24,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-29 03:52:24,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:52:24,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-29 03:52:24,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1467, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 03:52:24,025 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 41 states. [2020-10-29 03:52:25,088 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-10-29 03:52:25,545 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2020-10-29 03:52:25,718 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2020-10-29 03:52:25,924 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 51 [2020-10-29 03:52:26,107 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2020-10-29 03:52:26,289 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 51 [2020-10-29 03:52:26,496 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2020-10-29 03:52:26,684 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2020-10-29 03:52:26,868 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2020-10-29 03:52:27,092 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2020-10-29 03:52:27,300 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2020-10-29 03:52:27,494 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2020-10-29 03:52:27,692 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-10-29 03:52:27,895 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-10-29 03:52:28,089 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-10-29 03:52:28,283 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-10-29 03:52:28,478 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2020-10-29 03:52:28,668 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2020-10-29 03:52:28,855 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2020-10-29 03:52:29,039 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-10-29 03:52:29,249 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2020-10-29 03:52:29,645 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-10-29 03:52:29,850 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2020-10-29 03:52:30,062 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2020-10-29 03:52:30,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:52:30,667 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2020-10-29 03:52:30,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-29 03:52:30,668 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 76 [2020-10-29 03:52:30,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:52:30,670 INFO L225 Difference]: With dead ends: 120 [2020-10-29 03:52:30,670 INFO L226 Difference]: Without dead ends: 83 [2020-10-29 03:52:30,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=555, Invalid=4415, Unknown=0, NotChecked=0, Total=4970 [2020-10-29 03:52:30,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-29 03:52:30,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2020-10-29 03:52:30,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-29 03:52:30,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-10-29 03:52:30,683 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 76 [2020-10-29 03:52:30,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:52:30,683 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-10-29 03:52:30,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-29 03:52:30,684 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-10-29 03:52:30,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-29 03:52:30,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:52:30,684 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:52:30,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 03:52:30,685 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:52:30,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:52:30,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1546810043, now seen corresponding path program 16 times [2020-10-29 03:52:30,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:52:30,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938687712] [2020-10-29 03:52:30,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:52:30,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:52:30,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:30,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:31,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:31,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:31,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:31,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:31,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:31,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:32,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:33,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:34,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:34,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:34,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:34,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:35,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:52:35,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-29 03:52:35,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 03:52:35,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 03:52:35,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:52:35,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:52:35,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-29 03:52:35,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:52:35,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-29 03:52:35,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:52:36,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:52:36,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:52:36,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:36,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:52:36,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:52:36,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:52:36,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:52:36,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:52:36,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:52:36,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:52:36,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:52:36,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:52:36,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:52:36,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:52:36,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:52:36,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:36,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:52:36,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:52:36,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:52:36,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:52:36,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:52:36,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:52:36,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:52:36,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:52:36,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:52:36,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:52:36,156 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 128 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:52:36,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938687712] [2020-10-29 03:52:36,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:52:36,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 03:52:36,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120510090] [2020-10-29 03:52:36,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 03:52:36,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:52:36,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 03:52:36,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2020-10-29 03:52:36,159 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 24 states. [2020-10-29 03:52:36,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:52:36,996 INFO L93 Difference]: Finished difference Result 152 states and 157 transitions. [2020-10-29 03:52:36,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 03:52:36,997 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 79 [2020-10-29 03:52:36,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:52:36,998 INFO L225 Difference]: With dead ends: 152 [2020-10-29 03:52:36,998 INFO L226 Difference]: Without dead ends: 87 [2020-10-29 03:52:36,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=279, Invalid=911, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 03:52:37,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-29 03:52:37,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2020-10-29 03:52:37,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-29 03:52:37,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-29 03:52:37,008 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 79 [2020-10-29 03:52:37,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:52:37,009 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-29 03:52:37,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-29 03:52:37,009 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-29 03:52:37,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-29 03:52:37,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:52:37,009 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:52:37,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 03:52:37,010 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:52:37,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:52:37,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1951028690, now seen corresponding path program 17 times [2020-10-29 03:52:37,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:52:37,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203093965] [2020-10-29 03:52:37,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:52:37,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:52:37,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:37,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:38,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:40,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:41,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:41,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:42,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:52:42,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 03:52:42,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:52:42,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 03:52:42,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:52:42,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:52:42,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-29 03:52:42,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:52:42,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-29 03:52:42,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:52:43,599 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-10-29 03:52:43,926 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-10-29 03:52:44,232 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2020-10-29 03:52:46,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:52:46,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:52:46,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:46,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:52:46,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:52:46,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:52:46,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:52:46,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:52:46,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:52:46,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:52:46,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:52:46,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:52:46,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:52:46,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:52:46,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:52:46,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:46,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:52:46,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:52:46,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:52:46,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:52:46,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:52:46,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:52:46,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:52:46,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:52:46,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:52:46,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:52:46,366 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:52:46,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203093965] [2020-10-29 03:52:46,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:52:46,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-29 03:52:46,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128236619] [2020-10-29 03:52:46,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-29 03:52:46,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:52:46,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-29 03:52:46,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1758, Unknown=0, NotChecked=0, Total=1980 [2020-10-29 03:52:46,369 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 45 states. [2020-10-29 03:52:47,494 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-10-29 03:52:48,011 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2020-10-29 03:52:48,235 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2020-10-29 03:52:48,521 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 60 [2020-10-29 03:52:48,764 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 63 [2020-10-29 03:52:49,061 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 61 [2020-10-29 03:52:49,297 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2020-10-29 03:52:49,588 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 59 [2020-10-29 03:52:49,826 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2020-10-29 03:52:50,107 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2020-10-29 03:52:50,343 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2020-10-29 03:52:50,618 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2020-10-29 03:52:50,854 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2020-10-29 03:52:51,143 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2020-10-29 03:52:51,381 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-10-29 03:52:51,639 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2020-10-29 03:52:51,836 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2020-10-29 03:52:52,056 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-10-29 03:52:52,316 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2020-10-29 03:52:52,579 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2020-10-29 03:52:53,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:52:53,294 INFO L93 Difference]: Finished difference Result 129 states and 135 transitions. [2020-10-29 03:52:53,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-29 03:52:53,295 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 82 [2020-10-29 03:52:53,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:52:53,296 INFO L225 Difference]: With dead ends: 129 [2020-10-29 03:52:53,296 INFO L226 Difference]: Without dead ends: 89 [2020-10-29 03:52:53,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=557, Invalid=4273, Unknown=0, NotChecked=0, Total=4830 [2020-10-29 03:52:53,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-29 03:52:53,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2020-10-29 03:52:53,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-29 03:52:53,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-10-29 03:52:53,308 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 82 [2020-10-29 03:52:53,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:52:53,308 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-10-29 03:52:53,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-29 03:52:53,309 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-10-29 03:52:53,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-29 03:52:53,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:52:53,310 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:52:53,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 03:52:53,310 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:52:53,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:52:53,310 INFO L82 PathProgramCache]: Analyzing trace with hash 404294592, now seen corresponding path program 18 times [2020-10-29 03:52:53,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:52:53,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926387399] [2020-10-29 03:52:53,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:52:53,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:52:53,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:53,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:53,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:53,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:54,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:54,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:54,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:54,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:54,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:55,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:58,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:52:58,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-29 03:52:58,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 03:52:58,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 03:52:58,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:52:58,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:52:58,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-29 03:52:58,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:52:58,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-29 03:52:58,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:52:58,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:52:58,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:52:58,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:58,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:52:58,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:52:58,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:52:58,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:52:58,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:52:58,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:52:58,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:52:58,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:52:58,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:52:58,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:52:58,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:52:58,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:52:58,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:52:58,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:52:58,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:52:58,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:52:58,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:52:58,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:52:58,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:52:58,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:52:58,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:52:58,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:52:58,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:52:58,859 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 148 proven. 173 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:52:58,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926387399] [2020-10-29 03:52:58,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:52:58,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-29 03:52:58,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658665503] [2020-10-29 03:52:58,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-29 03:52:58,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:52:58,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-29 03:52:58,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2020-10-29 03:52:58,862 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 26 states. [2020-10-29 03:52:59,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:52:59,820 INFO L93 Difference]: Finished difference Result 164 states and 169 transitions. [2020-10-29 03:52:59,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 03:52:59,823 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 85 [2020-10-29 03:52:59,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:52:59,824 INFO L225 Difference]: With dead ends: 164 [2020-10-29 03:52:59,824 INFO L226 Difference]: Without dead ends: 93 [2020-10-29 03:52:59,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=305, Invalid=1027, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 03:52:59,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-29 03:52:59,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2020-10-29 03:52:59,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-29 03:52:59,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2020-10-29 03:52:59,835 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 85 [2020-10-29 03:52:59,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:52:59,836 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2020-10-29 03:52:59,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-29 03:52:59,836 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2020-10-29 03:52:59,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-29 03:52:59,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:52:59,836 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:52:59,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 03:52:59,837 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:52:59,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:52:59,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1781137815, now seen corresponding path program 19 times [2020-10-29 03:52:59,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:52:59,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116335631] [2020-10-29 03:52:59,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:52:59,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:52:59,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:01,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:03,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:04,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:05,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:05,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-29 03:53:05,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:53:05,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5397 [2020-10-29 03:53:05,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:05,263 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:05,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-29 03:53:05,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:53:05,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-29 03:53:05,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:53:07,141 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-10-29 03:53:07,468 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-10-29 03:53:07,637 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-10-29 03:53:07,826 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-10-29 03:53:08,169 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-10-29 03:53:08,379 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2020-10-29 03:53:08,808 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2020-10-29 03:53:09,207 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-29 03:53:09,608 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-10-29 03:53:12,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:53:12,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:12,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:12,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:12,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:53:12,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:53:12,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:53:12,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:12,471 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:12,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:53:12,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:53:12,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:53:12,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:53:12,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:53:12,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:12,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:12,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:12,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:53:12,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:53:12,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-29 03:53:12,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:12,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:12,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:53:12,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:53:12,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:53:12,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:53:12,566 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:53:12,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116335631] [2020-10-29 03:53:12,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:53:12,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-29 03:53:12,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676985391] [2020-10-29 03:53:12,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-29 03:53:12,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:53:12,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-29 03:53:12,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=2149, Unknown=0, NotChecked=0, Total=2352 [2020-10-29 03:53:12,569 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand 49 states. [2020-10-29 03:53:14,846 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2020-10-29 03:53:15,735 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 62 [2020-10-29 03:53:16,073 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 66 [2020-10-29 03:53:16,340 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 61 [2020-10-29 03:53:16,688 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 70 [2020-10-29 03:53:17,010 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 71 [2020-10-29 03:53:17,329 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 65 [2020-10-29 03:53:17,646 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 62 [2020-10-29 03:53:17,921 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 64 [2020-10-29 03:53:18,182 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2020-10-29 03:53:18,455 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 68 [2020-10-29 03:53:18,748 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 70 [2020-10-29 03:53:19,070 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 64 [2020-10-29 03:53:19,404 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2020-10-29 03:53:19,711 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 64 [2020-10-29 03:53:20,030 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2020-10-29 03:53:20,382 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 71 [2020-10-29 03:53:20,708 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 73 [2020-10-29 03:53:21,032 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2020-10-29 03:53:21,348 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2020-10-29 03:53:21,658 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2020-10-29 03:53:21,963 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2020-10-29 03:53:22,266 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2020-10-29 03:53:22,532 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2020-10-29 03:53:22,829 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-10-29 03:53:23,144 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2020-10-29 03:53:23,424 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2020-10-29 03:53:23,710 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2020-10-29 03:53:24,066 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 61 [2020-10-29 03:53:24,503 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2020-10-29 03:53:25,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:53:25,603 INFO L93 Difference]: Finished difference Result 138 states and 144 transitions. [2020-10-29 03:53:25,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-29 03:53:25,605 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 88 [2020-10-29 03:53:25,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:53:25,606 INFO L225 Difference]: With dead ends: 138 [2020-10-29 03:53:25,606 INFO L226 Difference]: Without dead ends: 95 [2020-10-29 03:53:25,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1437 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=720, Invalid=6252, Unknown=0, NotChecked=0, Total=6972 [2020-10-29 03:53:25,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-29 03:53:25,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2020-10-29 03:53:25,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-29 03:53:25,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2020-10-29 03:53:25,619 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 88 [2020-10-29 03:53:25,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:53:25,619 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2020-10-29 03:53:25,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-29 03:53:25,619 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2020-10-29 03:53:25,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-29 03:53:25,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:53:25,620 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:53:25,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 03:53:25,621 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:53:25,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:53:25,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1343287845, now seen corresponding path program 20 times [2020-10-29 03:53:25,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:53:25,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692120683] [2020-10-29 03:53:25,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:53:25,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:25,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:25,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:25,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:26,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:26,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:26,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:26,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:29,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:30,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:30,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:30,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-29 03:53:30,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 03:53:30,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 03:53:30,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:30,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:30,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-29 03:53:30,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:53:30,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-29 03:53:30,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:53:31,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:53:31,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:31,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:31,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:31,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:53:31,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:53:31,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:53:31,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:31,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:31,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:53:31,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:53:31,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:53:31,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:53:31,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 03:53:31,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:31,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:31,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:31,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:53:31,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:53:31,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:53:31,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:31,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:31,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:53:31,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:53:31,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:53:31,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:53:31,325 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 210 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:53:31,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692120683] [2020-10-29 03:53:31,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:53:31,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-29 03:53:31,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428354585] [2020-10-29 03:53:31,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-29 03:53:31,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:53:31,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-29 03:53:31,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2020-10-29 03:53:31,328 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 28 states. [2020-10-29 03:53:32,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:53:32,443 INFO L93 Difference]: Finished difference Result 176 states and 181 transitions. [2020-10-29 03:53:32,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-29 03:53:32,445 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 91 [2020-10-29 03:53:32,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:53:32,446 INFO L225 Difference]: With dead ends: 176 [2020-10-29 03:53:32,446 INFO L226 Difference]: Without dead ends: 99 [2020-10-29 03:53:32,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=381, Invalid=1259, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 03:53:32,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-29 03:53:32,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2020-10-29 03:53:32,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-29 03:53:32,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2020-10-29 03:53:32,460 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 91 [2020-10-29 03:53:32,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:53:32,460 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2020-10-29 03:53:32,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-29 03:53:32,460 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2020-10-29 03:53:32,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-29 03:53:32,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:53:32,461 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:53:32,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 03:53:32,461 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:53:32,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:53:32,462 INFO L82 PathProgramCache]: Analyzing trace with hash -99613070, now seen corresponding path program 21 times [2020-10-29 03:53:32,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:53:32,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932639480] [2020-10-29 03:53:32,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:53:32,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:53:32,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:34,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:35,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:53:37,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:53:37,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-29 03:53:37,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:53:37,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 03:53:37,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:53:37,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:53:37,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-29 03:53:37,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:53:37,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-29 03:53:37,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:53:40,424 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-29 03:53:40,843 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-10-29 03:53:41,267 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-10-29 03:53:41,677 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51