/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loop-simple/deep-nested.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:34:07,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:34:07,194 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:34:07,234 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:34:07,234 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:34:07,236 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:34:07,238 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:34:07,240 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:34:07,243 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:34:07,244 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:34:07,246 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:34:07,247 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:34:07,248 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:34:07,249 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:34:07,251 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:34:07,253 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:34:07,254 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:34:07,255 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:34:07,258 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:34:07,260 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:34:07,262 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:34:07,267 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:34:07,268 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:34:07,270 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:34:07,280 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:34:07,281 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:34:07,282 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:34:07,285 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:34:07,287 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:34:07,288 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:34:07,289 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:34:07,290 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:34:07,291 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:34:07,292 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:34:07,294 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:34:07,295 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:34:07,318 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:34:07,318 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:34:07,319 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:34:07,320 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:34:07,326 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:34:07,328 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 20:34:07,413 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:34:07,413 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:34:07,417 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:34:07,418 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:34:07,418 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:34:07,418 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:34:07,419 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:34:07,419 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:34:07,419 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:34:07,420 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:34:07,421 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:34:07,421 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:34:07,421 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:34:07,422 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:34:07,422 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:34:07,422 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:34:07,422 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:34:07,423 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:34:07,423 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:34:07,423 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:34:07,424 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:34:07,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:34:07,424 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:34:07,424 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:34:07,425 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:34:07,425 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:34:07,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:34:07,425 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:34:07,426 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:34:07,426 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:34:07,875 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:34:07,904 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:34:07,907 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:34:07,909 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:34:07,910 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:34:07,911 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-simple/deep-nested.c [2020-10-27 20:34:07,999 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ead4dde33/d2e676488f484236948269df4bfb1c98/FLAG924d0da02 [2020-10-27 20:34:08,554 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:34:08,554 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-simple/deep-nested.c [2020-10-27 20:34:08,562 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ead4dde33/d2e676488f484236948269df4bfb1c98/FLAG924d0da02 [2020-10-27 20:34:08,888 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ead4dde33/d2e676488f484236948269df4bfb1c98 [2020-10-27 20:34:08,891 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:34:08,898 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:34:08,899 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:34:08,900 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:34:08,904 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:34:08,904 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:34:08" (1/1) ... [2020-10-27 20:34:08,908 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34961d1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:34:08, skipping insertion in model container [2020-10-27 20:34:08,908 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:34:08" (1/1) ... [2020-10-27 20:34:08,916 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:34:08,931 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:34:09,095 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:34:09,108 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:34:09,129 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:34:09,146 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:34:09,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:34:09 WrapperNode [2020-10-27 20:34:09,147 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:34:09,148 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:34:09,148 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:34:09,149 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:34:09,162 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:34:09" (1/1) ... [2020-10-27 20:34:09,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:34:09" (1/1) ... [2020-10-27 20:34:09,171 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:34:09" (1/1) ... [2020-10-27 20:34:09,171 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:34:09" (1/1) ... [2020-10-27 20:34:09,178 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:34:09" (1/1) ... [2020-10-27 20:34:09,183 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:34:09" (1/1) ... [2020-10-27 20:34:09,185 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:34:09" (1/1) ... [2020-10-27 20:34:09,188 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:34:09,189 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:34:09,189 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:34:09,189 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:34:09,190 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:34:09" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:34:09,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:34:09,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:34:09,323 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:34:09,323 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:34:09,324 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:34:09,324 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:34:09,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:34:09,324 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:34:09,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:34:09,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:34:09,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:34:09,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:34:09,326 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:34:09,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:34:09,714 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:34:09,715 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-27 20:34:09,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:34:09 BoogieIcfgContainer [2020-10-27 20:34:09,717 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:34:09,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:34:09,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:34:09,724 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:34:09,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:34:08" (1/3) ... [2020-10-27 20:34:09,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59bb54a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:34:09, skipping insertion in model container [2020-10-27 20:34:09,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:34:09" (2/3) ... [2020-10-27 20:34:09,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59bb54a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:34:09, skipping insertion in model container [2020-10-27 20:34:09,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:34:09" (3/3) ... [2020-10-27 20:34:09,728 INFO L111 eAbstractionObserver]: Analyzing ICFG deep-nested.c [2020-10-27 20:34:09,745 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:34:09,751 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:34:09,769 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:34:09,800 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:34:09,801 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:34:09,804 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:34:09,804 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:34:09,804 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:34:09,805 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:34:09,805 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:34:09,805 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:34:09,842 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-27 20:34:09,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 20:34:09,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:34:09,861 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:34:09,861 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:34:09,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:34:09,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1376373702, now seen corresponding path program 1 times [2020-10-27 20:34:09,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:34:09,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144340291] [2020-10-27 20:34:09,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:34:10,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:10,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:10,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:10,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 20:34:10,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:10,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 252 [2020-10-27 20:34:10,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:10,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:34:10,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:34:10,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:34:10,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-27 20:34:10,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:34:10,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:10,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:10,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:10,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:34:10,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:10,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-27 20:34:10,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:10,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:34:10,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:34:10,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:34:10,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 20:34:10,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:34:10,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144340291] [2020-10-27 20:34:10,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:34:10,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:34:10,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771959710] [2020-10-27 20:34:10,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:34:10,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:34:10,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:34:10,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:34:10,864 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 4 states. [2020-10-27 20:34:11,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:34:11,418 INFO L93 Difference]: Finished difference Result 60 states and 92 transitions. [2020-10-27 20:34:11,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:34:11,421 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-27 20:34:11,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:34:11,432 INFO L225 Difference]: With dead ends: 60 [2020-10-27 20:34:11,432 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 20:34:11,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:34:11,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 20:34:11,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-27 20:34:11,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 20:34:11,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2020-10-27 20:34:11,497 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 14 [2020-10-27 20:34:11,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:34:11,498 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2020-10-27 20:34:11,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:34:11,498 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2020-10-27 20:34:11,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 20:34:11,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:34:11,499 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:34:11,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:34:11,500 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:34:11,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:34:11,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1966143318, now seen corresponding path program 1 times [2020-10-27 20:34:11,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:34:11,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510760621] [2020-10-27 20:34:11,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:34:11,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:11,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:11,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:11,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:11,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:11,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:11,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:12,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:12,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:12,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:12,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:12,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:12,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 20:34:12,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 20:34:12,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-10-27 20:34:12,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:12,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:34:12,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:34:12,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:34:12,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:34:12,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:34:12,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:12,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:12,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:12,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:34:12,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:12,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:34:12,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:12,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:34:12,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:34:12,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:34:12,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:12,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:34:12,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510760621] [2020-10-27 20:34:12,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:34:12,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 20:34:12,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409302126] [2020-10-27 20:34:12,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:34:12,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:34:12,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:34:12,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:34:12,728 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 6 states. [2020-10-27 20:34:15,239 WARN L193 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-10-27 20:34:15,608 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2020-10-27 20:34:20,142 WARN L193 SmtUtils]: Spent 4.31 s on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 20:34:20,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:34:20,203 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2020-10-27 20:34:20,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:34:20,204 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-27 20:34:20,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:34:20,206 INFO L225 Difference]: With dead ends: 45 [2020-10-27 20:34:20,206 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 20:34:20,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:34:20,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 20:34:20,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2020-10-27 20:34:20,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 20:34:20,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2020-10-27 20:34:20,224 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 17 [2020-10-27 20:34:20,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:34:20,224 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2020-10-27 20:34:20,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:34:20,224 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2020-10-27 20:34:20,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 20:34:20,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:34:20,225 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:34:20,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:34:20,226 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:34:20,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:34:20,227 INFO L82 PathProgramCache]: Analyzing trace with hash -166255054, now seen corresponding path program 1 times [2020-10-27 20:34:20,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:34:20,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292617434] [2020-10-27 20:34:20,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:34:20,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:20,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:20,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:20,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:20,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:20,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:20,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:20,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:20,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:20,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:21,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:21,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:21,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:21,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:21,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:21,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:21,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:22,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:22,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 20:34:22,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 20:34:22,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2379 [2020-10-27 20:34:22,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:22,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:34:22,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 20:34:22,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:34:22,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:22,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:34:22,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:22,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:22,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:22,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:34:22,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:22,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:34:22,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:22,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:34:22,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:34:22,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:34:22,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:22,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:34:22,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292617434] [2020-10-27 20:34:22,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:34:22,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 20:34:22,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945958221] [2020-10-27 20:34:22,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:34:22,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:34:22,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:34:22,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:34:22,835 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand 6 states. [2020-10-27 20:34:23,172 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-10-27 20:34:23,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:34:23,352 INFO L93 Difference]: Finished difference Result 83 states and 112 transitions. [2020-10-27 20:34:23,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:34:23,353 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-27 20:34:23,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:34:23,355 INFO L225 Difference]: With dead ends: 83 [2020-10-27 20:34:23,355 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 20:34:23,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:34:23,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 20:34:23,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 37. [2020-10-27 20:34:23,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 20:34:23,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2020-10-27 20:34:23,387 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 20 [2020-10-27 20:34:23,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:34:23,387 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2020-10-27 20:34:23,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:34:23,387 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2020-10-27 20:34:23,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 20:34:23,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:34:23,391 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:34:23,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:34:23,392 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:34:23,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:34:23,393 INFO L82 PathProgramCache]: Analyzing trace with hash -743663998, now seen corresponding path program 1 times [2020-10-27 20:34:23,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:34:23,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753506539] [2020-10-27 20:34:23,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:34:23,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:23,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:23,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:23,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:23,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:23,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:23,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:23,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:23,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:23,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:23,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:23,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:23,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:23,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:24,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:24,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:24,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:24,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:24,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:24,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:24,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:24,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:27,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:27,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 20:34:27,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-27 20:34:27,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4365 [2020-10-27 20:34:27,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:27,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:34:27,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 20:34:27,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 20:34:27,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:27,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:34:27,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:27,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:27,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:27,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:34:27,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:27,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:34:27,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:27,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:34:27,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:34:27,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:34:27,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:27,877 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 20:34:27,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753506539] [2020-10-27 20:34:27,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:34:27,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:34:27,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425788028] [2020-10-27 20:34:27,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:34:27,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:34:27,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:34:27,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:34:27,880 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand 4 states. [2020-10-27 20:34:28,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:34:28,033 INFO L93 Difference]: Finished difference Result 74 states and 96 transitions. [2020-10-27 20:34:28,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:34:28,034 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-27 20:34:28,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:34:28,035 INFO L225 Difference]: With dead ends: 74 [2020-10-27 20:34:28,035 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 20:34:28,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:34:28,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 20:34:28,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2020-10-27 20:34:28,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 20:34:28,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2020-10-27 20:34:28,054 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 23 [2020-10-27 20:34:28,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:34:28,054 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2020-10-27 20:34:28,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:34:28,055 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2020-10-27 20:34:28,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 20:34:28,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:34:28,056 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:34:28,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:34:28,056 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:34:28,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:34:28,057 INFO L82 PathProgramCache]: Analyzing trace with hash -719206686, now seen corresponding path program 2 times [2020-10-27 20:34:28,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:34:28,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006313910] [2020-10-27 20:34:28,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:34:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:28,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:28,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:28,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:28,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:28,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:28,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:28,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:28,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:28,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:28,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:28,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:28,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:29,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:29,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:29,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:29,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:29,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:29,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:29,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:29,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:29,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:29,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:29,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:29,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:29,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:29,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:30,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:31,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:31,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:31,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:32,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:32,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:32,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:32,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:32,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:32,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:32,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:32,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:32,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:33,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:33,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:33,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:34:33,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 40 [2020-10-27 20:34:33,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 20:34:33,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:33,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:34:33,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 20:34:33,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:34:33,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:34:33,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:34:33,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:33,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:33,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:33,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:34:33,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:33,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 20:34:33,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:33,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:34:33,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:34:33,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:34:33,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:33,275 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:34:33,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006313910] [2020-10-27 20:34:33,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:34:33,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:34:33,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143620788] [2020-10-27 20:34:33,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:34:33,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:34:33,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:34:33,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:34:33,278 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 8 states. [2020-10-27 20:34:33,845 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-10-27 20:34:34,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:34:34,123 INFO L93 Difference]: Finished difference Result 128 states and 165 transitions. [2020-10-27 20:34:34,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:34:34,124 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-10-27 20:34:34,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:34:34,126 INFO L225 Difference]: With dead ends: 128 [2020-10-27 20:34:34,126 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 20:34:34,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:34:34,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 20:34:34,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2020-10-27 20:34:34,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 20:34:34,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2020-10-27 20:34:34,155 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 26 [2020-10-27 20:34:34,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:34:34,155 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2020-10-27 20:34:34,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:34:34,155 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2020-10-27 20:34:34,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 20:34:34,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:34:34,157 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:34:34,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:34:34,158 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:34:34,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:34:34,158 INFO L82 PathProgramCache]: Analyzing trace with hash 2039102082, now seen corresponding path program 3 times [2020-10-27 20:34:34,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:34:34,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012962189] [2020-10-27 20:34:34,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:34:34,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:34,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:34,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:34,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:34,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:34,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:34,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:34,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:34,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:34,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:34,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:34,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:34,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:34,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:34,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:34,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:34,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:35,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:35,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:36,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:36,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:36,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:36,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:36,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:36,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:36,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:37,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:37,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:39,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:39,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 20:34:39,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 27 [2020-10-27 20:34:39,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 20:34:39,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:39,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:34:39,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:34:39,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 20:34:39,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:39,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:34:39,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:39,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:39,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:39,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:34:39,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:39,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:34:39,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:39,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:34:39,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:34:39,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:34:39,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:39,342 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-27 20:34:39,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012962189] [2020-10-27 20:34:39,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:34:39,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 20:34:39,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203051820] [2020-10-27 20:34:39,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:34:39,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:34:39,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:34:39,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:34:39,346 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 6 states. [2020-10-27 20:34:39,635 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-10-27 20:34:39,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:34:39,764 INFO L93 Difference]: Finished difference Result 94 states and 113 transitions. [2020-10-27 20:34:39,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:34:39,766 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-27 20:34:39,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:34:39,767 INFO L225 Difference]: With dead ends: 94 [2020-10-27 20:34:39,767 INFO L226 Difference]: Without dead ends: 91 [2020-10-27 20:34:39,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:34:39,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-27 20:34:39,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-10-27 20:34:39,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-27 20:34:39,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 80 transitions. [2020-10-27 20:34:39,791 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 80 transitions. Word has length 29 [2020-10-27 20:34:39,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:34:39,791 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 80 transitions. [2020-10-27 20:34:39,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:34:39,791 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 80 transitions. [2020-10-27 20:34:39,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 20:34:39,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:34:39,793 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:34:39,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:34:39,793 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:34:39,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:34:39,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1063952334, now seen corresponding path program 4 times [2020-10-27 20:34:39,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:34:39,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547267790] [2020-10-27 20:34:39,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:34:39,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:39,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:39,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:39,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:40,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:40,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:40,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:40,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:40,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:40,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:40,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:40,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:40,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:40,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:40,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:40,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:40,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:40,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:40,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:40,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:40,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:40,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:40,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:40,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:41,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:41,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:41,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:41,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:41,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:41,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:41,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:41,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:41,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:41,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:43,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:44,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:44,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:44,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 20:34:44,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 35 [2020-10-27 20:34:44,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 20:34:44,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:44,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:34:44,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 20:34:44,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:34:44,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:34:45,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:34:45,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:45,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:45,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:45,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:34:45,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:34:45,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:34:45,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:45,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:34:45,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:34:45,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:34:45,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:34:45,170 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:34:45,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [547267790] [2020-10-27 20:34:45,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:34:45,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:34:45,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869897683] [2020-10-27 20:34:45,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:34:45,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:34:45,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:34:45,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:34:45,174 INFO L87 Difference]: Start difference. First operand 66 states and 80 transitions. Second operand 10 states. [2020-10-27 20:34:46,038 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-27 20:34:54,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:34:54,829 INFO L93 Difference]: Finished difference Result 216 states and 269 transitions. [2020-10-27 20:34:54,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:34:54,830 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-10-27 20:34:54,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:34:54,832 INFO L225 Difference]: With dead ends: 216 [2020-10-27 20:34:54,832 INFO L226 Difference]: Without dead ends: 157 [2020-10-27 20:34:54,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:34:54,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-27 20:34:54,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 126. [2020-10-27 20:34:54,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-27 20:34:54,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 155 transitions. [2020-10-27 20:34:54,890 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 155 transitions. Word has length 32 [2020-10-27 20:34:54,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:34:54,891 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 155 transitions. [2020-10-27 20:34:54,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:34:54,891 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 155 transitions. [2020-10-27 20:34:54,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 20:34:54,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:34:54,898 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:34:54,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:34:54,899 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:34:54,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:34:54,899 INFO L82 PathProgramCache]: Analyzing trace with hash -209675310, now seen corresponding path program 5 times [2020-10-27 20:34:54,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:34:54,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696851658] [2020-10-27 20:34:54,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:34:54,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:34:54,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:54,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:55,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:55,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:55,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:55,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:55,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:55,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:55,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:55,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:55,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:55,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:56,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:56,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:56,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:56,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:56,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:56,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:56,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:56,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:56,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:56,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:57,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:57,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:57,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:57,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:57,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:57,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:57,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:57,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:57,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:57,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:57,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:57,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:57,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:58,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:58,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:58,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:58,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:59,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:59,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:59,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:59,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:59,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:34:59,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:34:59,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 20:34:59,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 44 [2020-10-27 20:34:59,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 20:34:59,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:34:59,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:34:59,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:34:59,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 20:34:59,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:00,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:00,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:00,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:00,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:00,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:00,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:00,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:35:00,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:00,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:00,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:00,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:00,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:00,116 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-27 20:35:00,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696851658] [2020-10-27 20:35:00,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:35:00,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:35:00,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106880124] [2020-10-27 20:35:00,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:35:00,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:00,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:35:00,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:35:00,120 INFO L87 Difference]: Start difference. First operand 126 states and 155 transitions. Second operand 8 states. [2020-10-27 20:35:00,450 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-10-27 20:35:00,865 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-10-27 20:35:00,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:00,998 INFO L93 Difference]: Finished difference Result 254 states and 312 transitions. [2020-10-27 20:35:00,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:35:00,999 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-27 20:35:00,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:01,002 INFO L225 Difference]: With dead ends: 254 [2020-10-27 20:35:01,002 INFO L226 Difference]: Without dead ends: 251 [2020-10-27 20:35:01,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:35:01,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-27 20:35:01,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 146. [2020-10-27 20:35:01,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-27 20:35:01,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 180 transitions. [2020-10-27 20:35:01,077 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 180 transitions. Word has length 35 [2020-10-27 20:35:01,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:01,077 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 180 transitions. [2020-10-27 20:35:01,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:35:01,077 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 180 transitions. [2020-10-27 20:35:01,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 20:35:01,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:01,085 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:01,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:35:01,086 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:01,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:01,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1491354398, now seen corresponding path program 6 times [2020-10-27 20:35:01,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:01,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365830407] [2020-10-27 20:35:01,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:01,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:01,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:01,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:01,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:01,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:01,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:01,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:01,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:01,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:01,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:01,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:01,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:01,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:01,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:01,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:01,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:01,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:01,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:02,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:02,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:02,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:02,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:02,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:02,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:02,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:02,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:02,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:02,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:02,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:02,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:02,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:02,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:03,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:03,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:03,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:03,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:03,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:04,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:04,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:04,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:04,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:04,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:04,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:04,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:04,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:05,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:05,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:06,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:06,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 20:35:06,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 46 [2020-10-27 20:35:06,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 20:35:06,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:06,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:35:06,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:35:06,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 20:35:06,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:06,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:06,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:06,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:06,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:06,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:06,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:06,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:35:06,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:06,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:06,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:06,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:06,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:06,305 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 20:35:06,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365830407] [2020-10-27 20:35:06,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:35:06,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:35:06,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883642815] [2020-10-27 20:35:06,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:35:06,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:06,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:35:06,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:35:06,308 INFO L87 Difference]: Start difference. First operand 146 states and 180 transitions. Second operand 8 states. [2020-10-27 20:35:07,056 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-27 20:35:11,398 WARN L193 SmtUtils]: Spent 2.20 s on a formula simplification that was a NOOP. DAG size: 75 [2020-10-27 20:35:13,846 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 63 [2020-10-27 20:35:14,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:14,019 INFO L93 Difference]: Finished difference Result 249 states and 305 transitions. [2020-10-27 20:35:14,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:35:14,021 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-10-27 20:35:14,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:14,023 INFO L225 Difference]: With dead ends: 249 [2020-10-27 20:35:14,023 INFO L226 Difference]: Without dead ends: 246 [2020-10-27 20:35:14,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=70, Invalid=169, Unknown=1, NotChecked=0, Total=240 [2020-10-27 20:35:14,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-27 20:35:14,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 150. [2020-10-27 20:35:14,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-27 20:35:14,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 186 transitions. [2020-10-27 20:35:14,064 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 186 transitions. Word has length 38 [2020-10-27 20:35:14,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:14,064 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 186 transitions. [2020-10-27 20:35:14,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:35:14,064 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 186 transitions. [2020-10-27 20:35:14,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 20:35:14,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:14,065 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:14,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:35:14,066 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:14,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:14,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1764980494, now seen corresponding path program 1 times [2020-10-27 20:35:14,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:14,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592372585] [2020-10-27 20:35:14,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:14,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:14,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:14,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:14,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:14,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:14,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:14,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:14,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:14,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:14,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:14,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:14,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:14,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:15,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:16,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:17,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:17,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:19,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:19,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 20:35:19,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 20:35:19,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 20:35:19,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:19,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:35:19,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:35:19,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:35:19,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:19,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:19,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:19,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:19,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:19,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:19,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:19,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:35:19,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:19,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:19,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:19,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:19,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:19,268 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 35 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-27 20:35:19,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592372585] [2020-10-27 20:35:19,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:35:19,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:35:19,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452118292] [2020-10-27 20:35:19,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:35:19,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:19,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:35:19,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:35:19,273 INFO L87 Difference]: Start difference. First operand 150 states and 186 transitions. Second operand 7 states. [2020-10-27 20:35:19,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:19,880 INFO L93 Difference]: Finished difference Result 377 states and 464 transitions. [2020-10-27 20:35:19,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:35:19,881 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-10-27 20:35:19,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:19,882 INFO L225 Difference]: With dead ends: 377 [2020-10-27 20:35:19,883 INFO L226 Difference]: Without dead ends: 234 [2020-10-27 20:35:19,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:35:19,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-27 20:35:19,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 192. [2020-10-27 20:35:19,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-27 20:35:19,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 234 transitions. [2020-10-27 20:35:19,942 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 234 transitions. Word has length 41 [2020-10-27 20:35:19,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:19,942 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 234 transitions. [2020-10-27 20:35:19,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:35:19,942 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 234 transitions. [2020-10-27 20:35:19,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 20:35:19,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:19,944 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:19,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:35:19,944 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:19,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:19,945 INFO L82 PathProgramCache]: Analyzing trace with hash -774631686, now seen corresponding path program 7 times [2020-10-27 20:35:19,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:19,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347738696] [2020-10-27 20:35:19,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:19,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:19,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:20,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:20,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:21,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:21,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:21,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:21,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:21,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:21,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:21,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:21,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:21,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:22,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:22,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:22,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:22,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:22,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:22,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:22,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:22,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:22,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:23,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:23,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:24,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:24,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 20:35:24,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-27 20:35:24,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 20:35:24,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:24,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:35:24,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:35:24,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 20:35:24,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:25,349 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2020-10-27 20:35:25,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:25,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:25,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:25,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:25,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:25,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:25,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:35:25,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:25,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:25,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:25,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:25,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:25,497 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2020-10-27 20:35:25,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347738696] [2020-10-27 20:35:25,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:35:25,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:35:25,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218088849] [2020-10-27 20:35:25,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:35:25,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:25,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:35:25,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:35:25,500 INFO L87 Difference]: Start difference. First operand 192 states and 234 transitions. Second operand 7 states. [2020-10-27 20:35:26,024 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2020-10-27 20:35:26,295 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-27 20:35:26,503 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2020-10-27 20:35:26,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:26,744 INFO L93 Difference]: Finished difference Result 376 states and 459 transitions. [2020-10-27 20:35:26,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:35:26,745 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2020-10-27 20:35:26,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:26,748 INFO L225 Difference]: With dead ends: 376 [2020-10-27 20:35:26,748 INFO L226 Difference]: Without dead ends: 373 [2020-10-27 20:35:26,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:35:26,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-10-27 20:35:26,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 242. [2020-10-27 20:35:26,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-27 20:35:26,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 296 transitions. [2020-10-27 20:35:26,832 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 296 transitions. Word has length 47 [2020-10-27 20:35:26,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:26,832 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 296 transitions. [2020-10-27 20:35:26,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:35:26,833 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 296 transitions. [2020-10-27 20:35:26,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 20:35:26,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:26,834 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:26,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:35:26,834 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:26,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:26,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1965468138, now seen corresponding path program 1 times [2020-10-27 20:35:26,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:26,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552110220] [2020-10-27 20:35:26,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:26,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:26,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:26,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:26,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:26,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:31,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:31,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:31,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:31,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:31,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:31,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:31,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:31,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:31,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:31,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 20:35:31,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 20:35:31,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 20:35:31,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:31,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:35:31,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:35:31,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 20:35:31,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:31,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:31,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:31,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:31,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:31,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:31,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:31,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:35:31,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:31,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:31,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:31,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:31,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:31,948 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-10-27 20:35:31,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552110220] [2020-10-27 20:35:31,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:35:31,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:35:31,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297441102] [2020-10-27 20:35:31,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:35:31,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:31,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:35:31,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:35:31,951 INFO L87 Difference]: Start difference. First operand 242 states and 296 transitions. Second operand 4 states. [2020-10-27 20:35:32,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:32,244 INFO L93 Difference]: Finished difference Result 580 states and 708 transitions. [2020-10-27 20:35:32,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:35:32,245 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2020-10-27 20:35:32,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:32,247 INFO L225 Difference]: With dead ends: 580 [2020-10-27 20:35:32,248 INFO L226 Difference]: Without dead ends: 345 [2020-10-27 20:35:32,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:35:32,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-10-27 20:35:32,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 246. [2020-10-27 20:35:32,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-27 20:35:32,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 298 transitions. [2020-10-27 20:35:32,336 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 298 transitions. Word has length 50 [2020-10-27 20:35:32,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:32,336 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 298 transitions. [2020-10-27 20:35:32,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:35:32,337 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 298 transitions. [2020-10-27 20:35:32,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 20:35:32,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:32,338 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:32,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:35:32,338 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:32,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:32,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1808917786, now seen corresponding path program 1 times [2020-10-27 20:35:32,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:32,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828565381] [2020-10-27 20:35:32,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:32,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:32,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:32,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:32,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:32,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:32,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:32,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:32,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:32,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:32,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:32,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:32,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:32,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:33,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:33,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:34,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:34,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:34,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:37,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:37,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 20:35:37,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 20:35:37,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 20:35:37,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:37,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:35:37,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:35:37,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 20:35:37,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:37,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:37,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:37,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:37,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:37,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:37,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:37,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:35:37,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:37,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:37,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:37,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:37,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:37,605 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 107 proven. 11 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-10-27 20:35:37,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [828565381] [2020-10-27 20:35:37,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:35:37,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:35:37,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742208787] [2020-10-27 20:35:37,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:35:37,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:37,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:35:37,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:35:37,608 INFO L87 Difference]: Start difference. First operand 246 states and 298 transitions. Second operand 8 states. [2020-10-27 20:35:38,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:38,754 INFO L93 Difference]: Finished difference Result 746 states and 902 transitions. [2020-10-27 20:35:38,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:35:38,755 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-27 20:35:38,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:38,757 INFO L225 Difference]: With dead ends: 746 [2020-10-27 20:35:38,758 INFO L226 Difference]: Without dead ends: 499 [2020-10-27 20:35:38,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:35:38,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2020-10-27 20:35:38,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 336. [2020-10-27 20:35:38,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-27 20:35:38,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 395 transitions. [2020-10-27 20:35:38,848 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 395 transitions. Word has length 65 [2020-10-27 20:35:38,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:38,848 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 395 transitions. [2020-10-27 20:35:38,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:35:38,849 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 395 transitions. [2020-10-27 20:35:38,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-27 20:35:38,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:38,850 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 7, 6, 6, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:38,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 20:35:38,850 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:38,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:38,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1352940530, now seen corresponding path program 2 times [2020-10-27 20:35:38,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:38,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218670568] [2020-10-27 20:35:38,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:38,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:38,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:38,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:38,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:39,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:39,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:39,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:39,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:39,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:39,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:39,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:39,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:39,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:39,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:40,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:40,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:40,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:40,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:43,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:43,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 20:35:43,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 20:35:43,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 20:35:43,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:43,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:35:43,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-27 20:35:43,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 20:35:43,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:44,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:44,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:44,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:44,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:44,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:44,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:44,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:35:44,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:44,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:44,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:44,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:44,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:44,103 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 275 proven. 6 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-10-27 20:35:44,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218670568] [2020-10-27 20:35:44,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:35:44,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:35:44,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059390589] [2020-10-27 20:35:44,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:35:44,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:44,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:35:44,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:35:44,106 INFO L87 Difference]: Start difference. First operand 336 states and 395 transitions. Second operand 8 states. [2020-10-27 20:35:45,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:45,090 INFO L93 Difference]: Finished difference Result 762 states and 891 transitions. [2020-10-27 20:35:45,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:35:45,091 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 86 [2020-10-27 20:35:45,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:45,093 INFO L225 Difference]: With dead ends: 762 [2020-10-27 20:35:45,093 INFO L226 Difference]: Without dead ends: 433 [2020-10-27 20:35:45,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:35:45,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2020-10-27 20:35:45,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 328. [2020-10-27 20:35:45,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-10-27 20:35:45,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 381 transitions. [2020-10-27 20:35:45,175 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 381 transitions. Word has length 86 [2020-10-27 20:35:45,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:45,175 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 381 transitions. [2020-10-27 20:35:45,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:35:45,175 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 381 transitions. [2020-10-27 20:35:45,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-27 20:35:45,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:45,177 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 8, 7, 7, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:45,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 20:35:45,178 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:45,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:45,179 INFO L82 PathProgramCache]: Analyzing trace with hash 469947530, now seen corresponding path program 3 times [2020-10-27 20:35:45,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:45,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324003184] [2020-10-27 20:35:45,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:45,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:45,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:45,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:45,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:45,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:45,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:45,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:45,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:46,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:50,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:50,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 20:35:50,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 20:35:50,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 20:35:50,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:50,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:35:50,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:35:50,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 20:35:50,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:50,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:50,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:50,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:50,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:50,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:50,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:50,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:35:50,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:50,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:50,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:50,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:50,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:50,324 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 568 trivial. 0 not checked. [2020-10-27 20:35:50,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324003184] [2020-10-27 20:35:50,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:35:50,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:35:50,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646757672] [2020-10-27 20:35:50,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:35:50,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:50,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:35:50,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:35:50,326 INFO L87 Difference]: Start difference. First operand 328 states and 381 transitions. Second operand 4 states. [2020-10-27 20:35:50,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:50,656 INFO L93 Difference]: Finished difference Result 641 states and 746 transitions. [2020-10-27 20:35:50,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:35:50,657 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 95 [2020-10-27 20:35:50,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:50,662 INFO L225 Difference]: With dead ends: 641 [2020-10-27 20:35:50,662 INFO L226 Difference]: Without dead ends: 422 [2020-10-27 20:35:50,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:35:50,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-10-27 20:35:50,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 329. [2020-10-27 20:35:50,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2020-10-27 20:35:50,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 380 transitions. [2020-10-27 20:35:50,795 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 380 transitions. Word has length 95 [2020-10-27 20:35:50,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:50,796 INFO L481 AbstractCegarLoop]: Abstraction has 329 states and 380 transitions. [2020-10-27 20:35:50,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:35:50,796 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 380 transitions. [2020-10-27 20:35:50,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-27 20:35:50,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:50,798 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 12, 11, 11, 6, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:50,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 20:35:50,799 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:50,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:50,799 INFO L82 PathProgramCache]: Analyzing trace with hash -933771334, now seen corresponding path program 4 times [2020-10-27 20:35:50,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:50,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755309482] [2020-10-27 20:35:50,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:50,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:50,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:51,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:51,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:51,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:51,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:51,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:51,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:51,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:51,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:51,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:51,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:51,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:51,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:51,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:51,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:52,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:55,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:55,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:55,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:55,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:55,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-27 20:35:55,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-27 20:35:55,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 20:35:55,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:55,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:35:55,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:35:55,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 20:35:55,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:56,163 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 19 [2020-10-27 20:35:56,333 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 27 [2020-10-27 20:35:56,879 WARN L193 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 88 [2020-10-27 20:35:57,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:35:57,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:57,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:57,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:35:57,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:35:57,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:35:57,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:35:57,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:35:57,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:35:57,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:35:57,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:35:57,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:35:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1361 backedges. 654 proven. 86 refuted. 0 times theorem prover too weak. 621 trivial. 0 not checked. [2020-10-27 20:35:57,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755309482] [2020-10-27 20:35:57,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:35:57,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:35:57,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375253175] [2020-10-27 20:35:57,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:35:57,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:35:57,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:35:57,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:35:57,115 INFO L87 Difference]: Start difference. First operand 329 states and 380 transitions. Second operand 8 states. [2020-10-27 20:35:57,578 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 63 [2020-10-27 20:35:57,892 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 72 [2020-10-27 20:35:58,085 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-10-27 20:35:58,239 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-10-27 20:35:58,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:35:58,682 INFO L93 Difference]: Finished difference Result 645 states and 749 transitions. [2020-10-27 20:35:58,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:35:58,682 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 140 [2020-10-27 20:35:58,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:35:58,686 INFO L225 Difference]: With dead ends: 645 [2020-10-27 20:35:58,686 INFO L226 Difference]: Without dead ends: 426 [2020-10-27 20:35:58,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:35:58,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-10-27 20:35:58,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 426. [2020-10-27 20:35:58,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2020-10-27 20:35:58,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 491 transitions. [2020-10-27 20:35:58,824 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 491 transitions. Word has length 140 [2020-10-27 20:35:58,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:35:58,824 INFO L481 AbstractCegarLoop]: Abstraction has 426 states and 491 transitions. [2020-10-27 20:35:58,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:35:58,824 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 491 transitions. [2020-10-27 20:35:58,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-27 20:35:58,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:35:58,827 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 31, 16, 15, 15, 8, 7, 7, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:35:58,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 20:35:58,827 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:35:58,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:35:58,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1448886922, now seen corresponding path program 5 times [2020-10-27 20:35:58,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:35:58,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274833674] [2020-10-27 20:35:58,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:35:58,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:35:58,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:59,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:59,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:59,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:59,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:59,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:59,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:59,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:59,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:35:59,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:03,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:03,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:03,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-27 20:36:03,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 20:36:03,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 20:36:03,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:03,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:36:03,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:36:03,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 20:36:03,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:04,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:04,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:04,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:04,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:04,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:04,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:04,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:36:04,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:04,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:04,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:04,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:04,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:04,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2490 backedges. 537 proven. 22 refuted. 0 times theorem prover too weak. 1931 trivial. 0 not checked. [2020-10-27 20:36:04,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274833674] [2020-10-27 20:36:04,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:36:04,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:36:04,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160885351] [2020-10-27 20:36:04,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:36:04,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:04,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:36:04,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:36:04,136 INFO L87 Difference]: Start difference. First operand 426 states and 491 transitions. Second operand 7 states. [2020-10-27 20:36:04,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:04,707 INFO L93 Difference]: Finished difference Result 463 states and 528 transitions. [2020-10-27 20:36:04,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:36:04,708 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 185 [2020-10-27 20:36:04,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:04,710 INFO L225 Difference]: With dead ends: 463 [2020-10-27 20:36:04,710 INFO L226 Difference]: Without dead ends: 286 [2020-10-27 20:36:04,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:36:04,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-10-27 20:36:04,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 253. [2020-10-27 20:36:04,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-27 20:36:04,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 284 transitions. [2020-10-27 20:36:04,804 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 284 transitions. Word has length 185 [2020-10-27 20:36:04,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:04,805 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 284 transitions. [2020-10-27 20:36:04,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:36:04,805 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 284 transitions. [2020-10-27 20:36:04,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-10-27 20:36:04,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:04,808 INFO L422 BasicCegarLoop]: trace histogram [52, 51, 51, 17, 16, 16, 8, 7, 7, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:04,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 20:36:04,808 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:04,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:04,809 INFO L82 PathProgramCache]: Analyzing trace with hash 520878850, now seen corresponding path program 6 times [2020-10-27 20:36:04,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:04,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453554263] [2020-10-27 20:36:04,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:04,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:05,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:05,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:05,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:05,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:05,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:05,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:06,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:06,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:06,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:06,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:06,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:06,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:07,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:08,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:10,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:10,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 256 [2020-10-27 20:36:10,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 20:36:10,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-27 20:36:10,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:10,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:36:10,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-27 20:36:10,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 20:36:10,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:10,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:10,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:10,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:10,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:10,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:10,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:10,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:36:10,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:10,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:10,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:10,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:10,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:10,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5365 backedges. 2802 proven. 50 refuted. 0 times theorem prover too weak. 2513 trivial. 0 not checked. [2020-10-27 20:36:10,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453554263] [2020-10-27 20:36:10,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:36:10,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:36:10,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197953325] [2020-10-27 20:36:10,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:36:10,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:10,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:36:10,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:36:10,434 INFO L87 Difference]: Start difference. First operand 253 states and 284 transitions. Second operand 10 states. [2020-10-27 20:36:11,103 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-10-27 20:36:13,367 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-10-27 20:36:13,576 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2020-10-27 20:36:13,743 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-10-27 20:36:14,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:14,113 INFO L93 Difference]: Finished difference Result 648 states and 731 transitions. [2020-10-27 20:36:14,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 20:36:14,114 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 248 [2020-10-27 20:36:14,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:14,117 INFO L225 Difference]: With dead ends: 648 [2020-10-27 20:36:14,117 INFO L226 Difference]: Without dead ends: 429 [2020-10-27 20:36:14,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:36:14,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2020-10-27 20:36:14,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 339. [2020-10-27 20:36:14,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-10-27 20:36:14,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 377 transitions. [2020-10-27 20:36:14,257 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 377 transitions. Word has length 248 [2020-10-27 20:36:14,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:14,257 INFO L481 AbstractCegarLoop]: Abstraction has 339 states and 377 transitions. [2020-10-27 20:36:14,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:36:14,258 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 377 transitions. [2020-10-27 20:36:14,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-10-27 20:36:14,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:14,263 INFO L422 BasicCegarLoop]: trace histogram [73, 72, 72, 24, 23, 23, 8, 7, 7, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:14,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 20:36:14,263 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:14,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:14,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1265374422, now seen corresponding path program 7 times [2020-10-27 20:36:14,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:14,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009639421] [2020-10-27 20:36:14,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:14,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:14,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:15,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:15,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:15,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:16,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:16,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:16,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:16,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:16,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:16,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:17,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:17,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:17,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:17,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:17,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:18,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:19,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:19,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 340 [2020-10-27 20:36:19,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 20:36:19,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 20:36:19,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:19,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:36:19,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-27 20:36:19,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 20:36:19,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:20,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:20,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:20,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:20,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:20,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:20,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:20,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:36:20,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:20,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:20,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:20,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:20,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:20,316 INFO L134 CoverageAnalysis]: Checked inductivity of 10552 backedges. 6740 proven. 465 refuted. 0 times theorem prover too weak. 3347 trivial. 0 not checked. [2020-10-27 20:36:20,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009639421] [2020-10-27 20:36:20,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:36:20,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:36:20,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874372486] [2020-10-27 20:36:20,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:36:20,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:20,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:36:20,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:36:20,320 INFO L87 Difference]: Start difference. First operand 339 states and 377 transitions. Second operand 10 states. [2020-10-27 20:36:20,872 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-27 20:36:21,007 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2020-10-27 20:36:21,196 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-10-27 20:36:21,616 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-10-27 20:36:21,830 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2020-10-27 20:36:22,236 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2020-10-27 20:36:22,389 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-10-27 20:36:22,859 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2020-10-27 20:36:23,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:23,152 INFO L93 Difference]: Finished difference Result 902 states and 1007 transitions. [2020-10-27 20:36:23,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 20:36:23,153 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 332 [2020-10-27 20:36:23,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:23,157 INFO L225 Difference]: With dead ends: 902 [2020-10-27 20:36:23,157 INFO L226 Difference]: Without dead ends: 650 [2020-10-27 20:36:23,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2020-10-27 20:36:23,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2020-10-27 20:36:23,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 495. [2020-10-27 20:36:23,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 495 states. [2020-10-27 20:36:23,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 549 transitions. [2020-10-27 20:36:23,356 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 549 transitions. Word has length 332 [2020-10-27 20:36:23,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:23,356 INFO L481 AbstractCegarLoop]: Abstraction has 495 states and 549 transitions. [2020-10-27 20:36:23,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:36:23,357 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 549 transitions. [2020-10-27 20:36:23,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-10-27 20:36:23,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:23,361 INFO L422 BasicCegarLoop]: trace histogram [109, 108, 108, 36, 35, 35, 12, 11, 11, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:23,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 20:36:23,361 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:23,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:23,362 INFO L82 PathProgramCache]: Analyzing trace with hash 768154410, now seen corresponding path program 8 times [2020-10-27 20:36:23,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:23,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919873790] [2020-10-27 20:36:23,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:23,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:24,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:24,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:25,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:27,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:27,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:28,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:28,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:28,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:28,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:28,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:28,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:28,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 496 [2020-10-27 20:36:28,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 20:36:28,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5118 [2020-10-27 20:36:28,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:28,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:36:28,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:36:28,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 242 [2020-10-27 20:36:28,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:29,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:29,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:29,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:29,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:29,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:29,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:29,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 20:36:29,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:29,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:29,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:29,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:29,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:30,061 INFO L134 CoverageAnalysis]: Checked inductivity of 23810 backedges. 12023 proven. 4010 refuted. 0 times theorem prover too weak. 7777 trivial. 0 not checked. [2020-10-27 20:36:30,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919873790] [2020-10-27 20:36:30,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:36:30,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:36:30,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931404951] [2020-10-27 20:36:30,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:36:30,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:30,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:36:30,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:36:30,064 INFO L87 Difference]: Start difference. First operand 495 states and 549 transitions. Second operand 10 states. [2020-10-27 20:36:30,708 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-10-27 20:36:31,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:31,513 INFO L93 Difference]: Finished difference Result 1299 states and 1444 transitions. [2020-10-27 20:36:31,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:36:31,514 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 488 [2020-10-27 20:36:31,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:31,519 INFO L225 Difference]: With dead ends: 1299 [2020-10-27 20:36:31,519 INFO L226 Difference]: Without dead ends: 1052 [2020-10-27 20:36:31,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2020-10-27 20:36:31,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2020-10-27 20:36:31,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 735. [2020-10-27 20:36:31,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 735 states. [2020-10-27 20:36:31,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 815 transitions. [2020-10-27 20:36:31,824 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 815 transitions. Word has length 488 [2020-10-27 20:36:31,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:31,824 INFO L481 AbstractCegarLoop]: Abstraction has 735 states and 815 transitions. [2020-10-27 20:36:31,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:36:31,825 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 815 transitions. [2020-10-27 20:36:31,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 729 [2020-10-27 20:36:31,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:31,832 INFO L422 BasicCegarLoop]: trace histogram [163, 162, 162, 54, 53, 53, 18, 17, 17, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:31,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 20:36:31,832 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:31,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:31,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1283567914, now seen corresponding path program 9 times [2020-10-27 20:36:31,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:31,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537543595] [2020-10-27 20:36:31,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:32,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:33,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:34,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:35,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:36,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:37,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:37,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:38,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:38,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 736 [2020-10-27 20:36:38,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:36:38,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5522 [2020-10-27 20:36:38,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:38,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:36:38,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:36:38,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 20:36:38,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:38,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:38,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:38,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:38,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:38,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:38,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:38,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:36:38,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:38,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:38,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:38,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:38,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:38,800 INFO L134 CoverageAnalysis]: Checked inductivity of 53748 backedges. 5658 proven. 111 refuted. 0 times theorem prover too weak. 47979 trivial. 0 not checked. [2020-10-27 20:36:38,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537543595] [2020-10-27 20:36:38,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:36:38,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:36:38,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902614404] [2020-10-27 20:36:38,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:36:38,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:38,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:36:38,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:36:38,802 INFO L87 Difference]: Start difference. First operand 735 states and 815 transitions. Second operand 8 states. [2020-10-27 20:36:39,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:39,750 INFO L93 Difference]: Finished difference Result 1840 states and 2052 transitions. [2020-10-27 20:36:39,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:36:39,750 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 728 [2020-10-27 20:36:39,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:39,756 INFO L225 Difference]: With dead ends: 1840 [2020-10-27 20:36:39,757 INFO L226 Difference]: Without dead ends: 1151 [2020-10-27 20:36:39,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:36:39,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2020-10-27 20:36:40,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 961. [2020-10-27 20:36:40,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 961 states. [2020-10-27 20:36:40,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1060 transitions. [2020-10-27 20:36:40,117 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1060 transitions. Word has length 728 [2020-10-27 20:36:40,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:40,117 INFO L481 AbstractCegarLoop]: Abstraction has 961 states and 1060 transitions. [2020-10-27 20:36:40,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:36:40,117 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1060 transitions. [2020-10-27 20:36:40,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 957 [2020-10-27 20:36:40,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:40,128 INFO L422 BasicCegarLoop]: trace histogram [220, 219, 219, 73, 72, 72, 18, 17, 17, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:40,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 20:36:40,128 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:40,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:40,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1603909634, now seen corresponding path program 10 times [2020-10-27 20:36:40,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:40,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996331794] [2020-10-27 20:36:40,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:41,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:42,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:44,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:46,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:47,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:47,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 964 [2020-10-27 20:36:47,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:36:47,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5740 [2020-10-27 20:36:47,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:47,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:36:47,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:36:47,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 20:36:47,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:47,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:47,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:47,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:47,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:47,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:47,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:47,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:36:47,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:47,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:47,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:47,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:47,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:47,798 INFO L134 CoverageAnalysis]: Checked inductivity of 97429 backedges. 7639 proven. 20 refuted. 0 times theorem prover too weak. 89770 trivial. 0 not checked. [2020-10-27 20:36:47,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996331794] [2020-10-27 20:36:47,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:36:47,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:36:47,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794113112] [2020-10-27 20:36:47,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:36:47,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:47,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:36:47,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:36:47,801 INFO L87 Difference]: Start difference. First operand 961 states and 1060 transitions. Second operand 8 states. [2020-10-27 20:36:48,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:48,594 INFO L93 Difference]: Finished difference Result 2266 states and 2537 transitions. [2020-10-27 20:36:48,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:36:48,598 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 956 [2020-10-27 20:36:48,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:48,603 INFO L225 Difference]: With dead ends: 2266 [2020-10-27 20:36:48,603 INFO L226 Difference]: Without dead ends: 1325 [2020-10-27 20:36:48,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:36:48,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2020-10-27 20:36:48,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 1180. [2020-10-27 20:36:48,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1180 states. [2020-10-27 20:36:48,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 1279 transitions. [2020-10-27 20:36:48,960 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 1279 transitions. Word has length 956 [2020-10-27 20:36:48,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:48,960 INFO L481 AbstractCegarLoop]: Abstraction has 1180 states and 1279 transitions. [2020-10-27 20:36:48,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:36:48,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 1279 transitions. [2020-10-27 20:36:48,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1176 [2020-10-27 20:36:48,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:48,975 INFO L422 BasicCegarLoop]: trace histogram [293, 292, 292, 73, 72, 72, 18, 17, 17, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:48,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 20:36:48,975 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:48,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:48,976 INFO L82 PathProgramCache]: Analyzing trace with hash 391209650, now seen corresponding path program 11 times [2020-10-27 20:36:48,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:48,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247596539] [2020-10-27 20:36:48,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:50,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:52,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:55,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:57,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:57,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1183 [2020-10-27 20:36:57,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:36:57,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6474 [2020-10-27 20:36:57,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:57,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:36:57,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:36:57,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 191 [2020-10-27 20:36:57,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:57,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:57,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:57,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:57,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:57,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:57,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:57,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:36:57,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:57,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:57,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:57,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:57,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:59,079 INFO L134 CoverageAnalysis]: Checked inductivity of 158676 backedges. 43742 proven. 3026 refuted. 0 times theorem prover too weak. 111908 trivial. 0 not checked. [2020-10-27 20:36:59,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247596539] [2020-10-27 20:36:59,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:36:59,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:36:59,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818781142] [2020-10-27 20:36:59,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:36:59,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:59,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:36:59,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:36:59,082 INFO L87 Difference]: Start difference. First operand 1180 states and 1279 transitions. Second operand 12 states. [2020-10-27 20:36:59,504 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-10-27 20:36:59,783 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-10-27 20:36:59,933 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-10-27 20:37:00,066 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2020-10-27 20:37:00,213 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2020-10-27 20:37:00,380 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2020-10-27 20:37:00,539 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2020-10-27 20:37:00,706 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2020-10-27 20:37:03,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:37:03,818 INFO L93 Difference]: Finished difference Result 2602 states and 2822 transitions. [2020-10-27 20:37:03,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 20:37:03,819 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 1175 [2020-10-27 20:37:03,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:37:03,824 INFO L225 Difference]: With dead ends: 2602 [2020-10-27 20:37:03,824 INFO L226 Difference]: Without dead ends: 1620 [2020-10-27 20:37:03,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=181, Invalid=521, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:37:03,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1620 states. [2020-10-27 20:37:04,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1620 to 1572. [2020-10-27 20:37:04,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1572 states. [2020-10-27 20:37:04,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 1703 transitions. [2020-10-27 20:37:04,369 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 1703 transitions. Word has length 1175 [2020-10-27 20:37:04,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:37:04,369 INFO L481 AbstractCegarLoop]: Abstraction has 1572 states and 1703 transitions. [2020-10-27 20:37:04,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:37:04,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 1703 transitions. [2020-10-27 20:37:04,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1491 [2020-10-27 20:37:04,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:37:04,391 INFO L422 BasicCegarLoop]: trace histogram [373, 372, 372, 93, 92, 92, 23, 22, 22, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:37:04,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 20:37:04,391 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:37:04,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:37:04,392 INFO L82 PathProgramCache]: Analyzing trace with hash 661338586, now seen corresponding path program 12 times [2020-10-27 20:37:04,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:37:04,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892658194] [2020-10-27 20:37:04,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:37:07,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:10,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:12,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:12,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1498 [2020-10-27 20:37:12,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:37:12,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5447 [2020-10-27 20:37:12,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:12,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:37:12,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:37:12,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:37:12,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:37:13,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:37:13,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:13,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:13,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:13,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:37:13,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:37:13,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:37:13,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:13,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:37:13,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:37:13,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:37:13,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:37:14,134 INFO L134 CoverageAnalysis]: Checked inductivity of 257646 backedges. 5396 proven. 22 refuted. 0 times theorem prover too weak. 252228 trivial. 0 not checked. [2020-10-27 20:37:14,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892658194] [2020-10-27 20:37:14,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:37:14,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:37:14,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697573812] [2020-10-27 20:37:14,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:37:14,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:37:14,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:37:14,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:37:14,137 INFO L87 Difference]: Start difference. First operand 1572 states and 1703 transitions. Second operand 9 states. [2020-10-27 20:37:15,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:37:15,185 INFO L93 Difference]: Finished difference Result 3609 states and 3970 transitions. [2020-10-27 20:37:15,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:37:15,186 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1490 [2020-10-27 20:37:15,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:37:15,192 INFO L225 Difference]: With dead ends: 3609 [2020-10-27 20:37:15,192 INFO L226 Difference]: Without dead ends: 2060 [2020-10-27 20:37:15,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:37:15,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2020-10-27 20:37:15,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1866. [2020-10-27 20:37:15,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1866 states. [2020-10-27 20:37:15,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 1997 transitions. [2020-10-27 20:37:15,744 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 1997 transitions. Word has length 1490 [2020-10-27 20:37:15,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:37:15,745 INFO L481 AbstractCegarLoop]: Abstraction has 1866 states and 1997 transitions. [2020-10-27 20:37:15,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:37:15,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 1997 transitions. [2020-10-27 20:37:15,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1770 [2020-10-27 20:37:15,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:37:15,773 INFO L422 BasicCegarLoop]: trace histogram [466, 465, 465, 93, 92, 92, 23, 22, 22, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:37:15,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 20:37:15,774 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:37:15,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:37:15,775 INFO L82 PathProgramCache]: Analyzing trace with hash 639202106, now seen corresponding path program 13 times [2020-10-27 20:37:15,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:37:15,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917095351] [2020-10-27 20:37:15,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:37:19,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:23,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:27,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:27,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1777 [2020-10-27 20:37:27,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:37:27,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7740 [2020-10-27 20:37:27,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:27,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:37:27,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:37:27,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 20:37:27,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:37:28,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:37:28,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:28,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:28,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:28,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:37:28,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:37:28,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:37:28,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:28,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:37:28,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:37:28,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:37:28,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:37:29,372 INFO L134 CoverageAnalysis]: Checked inductivity of 383010 backedges. 8065 proven. 35 refuted. 0 times theorem prover too weak. 374910 trivial. 0 not checked. [2020-10-27 20:37:29,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917095351] [2020-10-27 20:37:29,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:37:29,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:37:29,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631869293] [2020-10-27 20:37:29,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:37:29,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:37:29,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:37:29,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:37:29,374 INFO L87 Difference]: Start difference. First operand 1866 states and 1997 transitions. Second operand 10 states. [2020-10-27 20:37:30,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:37:30,665 INFO L93 Difference]: Finished difference Result 4194 states and 4555 transitions. [2020-10-27 20:37:30,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:37:30,666 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 1769 [2020-10-27 20:37:30,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:37:30,673 INFO L225 Difference]: With dead ends: 4194 [2020-10-27 20:37:30,673 INFO L226 Difference]: Without dead ends: 2354 [2020-10-27 20:37:30,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:37:30,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2354 states. [2020-10-27 20:37:31,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2354 to 2160. [2020-10-27 20:37:31,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2160 states. [2020-10-27 20:37:31,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2160 states to 2160 states and 2291 transitions. [2020-10-27 20:37:31,287 INFO L78 Accepts]: Start accepts. Automaton has 2160 states and 2291 transitions. Word has length 1769 [2020-10-27 20:37:31,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:37:31,288 INFO L481 AbstractCegarLoop]: Abstraction has 2160 states and 2291 transitions. [2020-10-27 20:37:31,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:37:31,288 INFO L276 IsEmpty]: Start isEmpty. Operand 2160 states and 2291 transitions. [2020-10-27 20:37:31,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2049 [2020-10-27 20:37:31,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:37:31,326 INFO L422 BasicCegarLoop]: trace histogram [559, 558, 558, 93, 92, 92, 23, 22, 22, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:37:31,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 20:37:31,327 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:37:31,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:37:31,327 INFO L82 PathProgramCache]: Analyzing trace with hash -494793254, now seen corresponding path program 14 times [2020-10-27 20:37:31,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:37:31,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211456276] [2020-10-27 20:37:31,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:37:36,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:41,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:46,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:46,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 2056 [2020-10-27 20:37:46,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:37:46,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9811 [2020-10-27 20:37:46,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:46,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:37:46,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:37:46,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 20:37:46,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:37:47,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:37:47,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:37:47,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:37:47,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:37:47,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:37:47,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:37:47,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:37:47,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:37:47,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:37:47,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:37:47,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:37:47,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:37:48,902 INFO L134 CoverageAnalysis]: Checked inductivity of 534321 backedges. 11286 proven. 51 refuted. 0 times theorem prover too weak. 522984 trivial. 0 not checked. [2020-10-27 20:37:48,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211456276] [2020-10-27 20:37:48,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:37:48,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:37:48,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315932911] [2020-10-27 20:37:48,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:37:48,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:37:48,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:37:48,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:37:48,905 INFO L87 Difference]: Start difference. First operand 2160 states and 2291 transitions. Second operand 11 states. [2020-10-27 20:37:50,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:37:50,364 INFO L93 Difference]: Finished difference Result 4779 states and 5140 transitions. [2020-10-27 20:37:50,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:37:50,365 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 2048 [2020-10-27 20:37:50,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:37:50,373 INFO L225 Difference]: With dead ends: 4779 [2020-10-27 20:37:50,373 INFO L226 Difference]: Without dead ends: 2648 [2020-10-27 20:37:50,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:37:50,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2020-10-27 20:37:51,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 2454. [2020-10-27 20:37:51,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2454 states. [2020-10-27 20:37:51,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2454 states to 2454 states and 2585 transitions. [2020-10-27 20:37:51,277 INFO L78 Accepts]: Start accepts. Automaton has 2454 states and 2585 transitions. Word has length 2048 [2020-10-27 20:37:51,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:37:51,277 INFO L481 AbstractCegarLoop]: Abstraction has 2454 states and 2585 transitions. [2020-10-27 20:37:51,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:37:51,277 INFO L276 IsEmpty]: Start isEmpty. Operand 2454 states and 2585 transitions. [2020-10-27 20:37:51,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2328 [2020-10-27 20:37:51,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:37:51,323 INFO L422 BasicCegarLoop]: trace histogram [652, 651, 651, 93, 92, 92, 23, 22, 22, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:37:51,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 20:37:51,323 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:37:51,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:37:51,324 INFO L82 PathProgramCache]: Analyzing trace with hash 952739642, now seen corresponding path program 15 times [2020-10-27 20:37:51,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:37:51,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337796493] [2020-10-27 20:37:51,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY